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1 | 7105-7108 | Intext Questions
Intext Questions
Intext Questions
Intext Questions
Intext Questions
Rationalised 2023-24
263
Amines
The free amine can be obtained from the ammonium salt by treatment
with a strong base:
Ammonolysis has the disadvantage of yielding a mixture of primary,
secondary and tertiary amines and also a quaternary ammonium salt However, primary amine is obtained as a major product by taking
large excess of ammonia The order of reactivity of halides with amines is RI > RBr >RCl 3 |
1 | 7106-7109 | However, primary amine is obtained as a major product by taking
large excess of ammonia The order of reactivity of halides with amines is RI > RBr >RCl 3 Reduction of nitriles
Nitriles on reduction with lithium aluminium hydride (LiAlH4) or
catalytic hydrogenation produce primary amines |
1 | 7107-7110 | The order of reactivity of halides with amines is RI > RBr >RCl 3 Reduction of nitriles
Nitriles on reduction with lithium aluminium hydride (LiAlH4) or
catalytic hydrogenation produce primary amines This reaction is
used for ascent of amine series, i |
1 | 7108-7111 | 3 Reduction of nitriles
Nitriles on reduction with lithium aluminium hydride (LiAlH4) or
catalytic hydrogenation produce primary amines This reaction is
used for ascent of amine series, i e |
1 | 7109-7112 | Reduction of nitriles
Nitriles on reduction with lithium aluminium hydride (LiAlH4) or
catalytic hydrogenation produce primary amines This reaction is
used for ascent of amine series, i e , for preparation of amines
containing one carbon atom more than the starting amine |
1 | 7110-7113 | This reaction is
used for ascent of amine series, i e , for preparation of amines
containing one carbon atom more than the starting amine 4 |
1 | 7111-7114 | e , for preparation of amines
containing one carbon atom more than the starting amine 4 Reduction of amides
The amides on reduction with lithium aluminium hydride yield
amines |
1 | 7112-7115 | , for preparation of amines
containing one carbon atom more than the starting amine 4 Reduction of amides
The amides on reduction with lithium aluminium hydride yield
amines Example 9 |
1 | 7113-7116 | 4 Reduction of amides
The amides on reduction with lithium aluminium hydride yield
amines Example 9 1
Example 9 |
1 | 7114-7117 | Reduction of amides
The amides on reduction with lithium aluminium hydride yield
amines Example 9 1
Example 9 1
Example 9 |
1 | 7115-7118 | Example 9 1
Example 9 1
Example 9 1
Example 9 |
1 | 7116-7119 | 1
Example 9 1
Example 9 1
Example 9 1
Example 9 |
1 | 7117-7120 | 1
Example 9 1
Example 9 1
Example 9 1
Solution
Solution
Solution
Solution
Solution
Write chemical equations for the following reactions:
(i) Reaction of ethanolic NH3 with C2H5Cl |
1 | 7118-7121 | 1
Example 9 1
Example 9 1
Solution
Solution
Solution
Solution
Solution
Write chemical equations for the following reactions:
(i) Reaction of ethanolic NH3 with C2H5Cl (ii) Ammonolysis of benzyl chloride and reaction of amine so formed
with two moles of CH3Cl |
1 | 7119-7122 | 1
Example 9 1
Solution
Solution
Solution
Solution
Solution
Write chemical equations for the following reactions:
(i) Reaction of ethanolic NH3 with C2H5Cl (ii) Ammonolysis of benzyl chloride and reaction of amine so formed
with two moles of CH3Cl Rationalised 2023-24
264
Chemistry
5 |
1 | 7120-7123 | 1
Solution
Solution
Solution
Solution
Solution
Write chemical equations for the following reactions:
(i) Reaction of ethanolic NH3 with C2H5Cl (ii) Ammonolysis of benzyl chloride and reaction of amine so formed
with two moles of CH3Cl Rationalised 2023-24
264
Chemistry
5 Gabriel phthalimide synthesis
Gabriel synthesis is used for the preparation of primary amines |
1 | 7121-7124 | (ii) Ammonolysis of benzyl chloride and reaction of amine so formed
with two moles of CH3Cl Rationalised 2023-24
264
Chemistry
5 Gabriel phthalimide synthesis
Gabriel synthesis is used for the preparation of primary amines Phthalimide on treatment with ethanolic potassium hydroxide forms
potassium salt of phthalimide which on heating with alkyl halide
followed by alkaline hydrolysis produces the corresponding primary
amine |
1 | 7122-7125 | Rationalised 2023-24
264
Chemistry
5 Gabriel phthalimide synthesis
Gabriel synthesis is used for the preparation of primary amines Phthalimide on treatment with ethanolic potassium hydroxide forms
potassium salt of phthalimide which on heating with alkyl halide
followed by alkaline hydrolysis produces the corresponding primary
amine Aromatic primary amines cannot be prepared by this method
because aryl halides do not undergo nucleophilic substitution with
the anion formed by phthalimide |
1 | 7123-7126 | Gabriel phthalimide synthesis
Gabriel synthesis is used for the preparation of primary amines Phthalimide on treatment with ethanolic potassium hydroxide forms
potassium salt of phthalimide which on heating with alkyl halide
followed by alkaline hydrolysis produces the corresponding primary
amine Aromatic primary amines cannot be prepared by this method
because aryl halides do not undergo nucleophilic substitution with
the anion formed by phthalimide 6 |
1 | 7124-7127 | Phthalimide on treatment with ethanolic potassium hydroxide forms
potassium salt of phthalimide which on heating with alkyl halide
followed by alkaline hydrolysis produces the corresponding primary
amine Aromatic primary amines cannot be prepared by this method
because aryl halides do not undergo nucleophilic substitution with
the anion formed by phthalimide 6 Hoffmann bromamide degradation reaction
Hoffmann developed a method for preparation of primary amines by
treating an amide with bromine in an aqueous or ethanolic solution
of sodium hydroxide |
1 | 7125-7128 | Aromatic primary amines cannot be prepared by this method
because aryl halides do not undergo nucleophilic substitution with
the anion formed by phthalimide 6 Hoffmann bromamide degradation reaction
Hoffmann developed a method for preparation of primary amines by
treating an amide with bromine in an aqueous or ethanolic solution
of sodium hydroxide In this degradation reaction, migration of an
alkyl or aryl group takes place from carbonyl carbon of the amide
to the nitrogen atom |
1 | 7126-7129 | 6 Hoffmann bromamide degradation reaction
Hoffmann developed a method for preparation of primary amines by
treating an amide with bromine in an aqueous or ethanolic solution
of sodium hydroxide In this degradation reaction, migration of an
alkyl or aryl group takes place from carbonyl carbon of the amide
to the nitrogen atom The amine so formed contains one carbon less
than that present in the amide |
1 | 7127-7130 | Hoffmann bromamide degradation reaction
Hoffmann developed a method for preparation of primary amines by
treating an amide with bromine in an aqueous or ethanolic solution
of sodium hydroxide In this degradation reaction, migration of an
alkyl or aryl group takes place from carbonyl carbon of the amide
to the nitrogen atom The amine so formed contains one carbon less
than that present in the amide Write chemical equations for the following conversions:
(i) CH3–CH2–Cl into CH3–CH2–CH2–NH2
(ii) C6H5–CH2–Cl into C6H5–CH2–CH2–NH2
Example 9 |
1 | 7128-7131 | In this degradation reaction, migration of an
alkyl or aryl group takes place from carbonyl carbon of the amide
to the nitrogen atom The amine so formed contains one carbon less
than that present in the amide Write chemical equations for the following conversions:
(i) CH3–CH2–Cl into CH3–CH2–CH2–NH2
(ii) C6H5–CH2–Cl into C6H5–CH2–CH2–NH2
Example 9 2
Example 9 |
1 | 7129-7132 | The amine so formed contains one carbon less
than that present in the amide Write chemical equations for the following conversions:
(i) CH3–CH2–Cl into CH3–CH2–CH2–NH2
(ii) C6H5–CH2–Cl into C6H5–CH2–CH2–NH2
Example 9 2
Example 9 2
Example 9 |
1 | 7130-7133 | Write chemical equations for the following conversions:
(i) CH3–CH2–Cl into CH3–CH2–CH2–NH2
(ii) C6H5–CH2–Cl into C6H5–CH2–CH2–NH2
Example 9 2
Example 9 2
Example 9 2
Example 9 |
1 | 7131-7134 | 2
Example 9 2
Example 9 2
Example 9 2
Example 9 |
1 | 7132-7135 | 2
Example 9 2
Example 9 2
Example 9 2
Solution
Solution
Solution
Solution
Solution
Rationalised 2023-24
265
Amines
The lower aliphatic amines are gases with fishy odour |
1 | 7133-7136 | 2
Example 9 2
Example 9 2
Solution
Solution
Solution
Solution
Solution
Rationalised 2023-24
265
Amines
The lower aliphatic amines are gases with fishy odour Primary amines
with three or more carbon atoms are liquid and still higher ones are
solid |
1 | 7134-7137 | 2
Example 9 2
Solution
Solution
Solution
Solution
Solution
Rationalised 2023-24
265
Amines
The lower aliphatic amines are gases with fishy odour Primary amines
with three or more carbon atoms are liquid and still higher ones are
solid Aniline and other arylamines are usually colourless but get
coloured on storage due to atmospheric oxidation |
1 | 7135-7138 | 2
Solution
Solution
Solution
Solution
Solution
Rationalised 2023-24
265
Amines
The lower aliphatic amines are gases with fishy odour Primary amines
with three or more carbon atoms are liquid and still higher ones are
solid Aniline and other arylamines are usually colourless but get
coloured on storage due to atmospheric oxidation Lower aliphatic amines are soluble in water because they can form
hydrogen bonds with water molecules |
1 | 7136-7139 | Primary amines
with three or more carbon atoms are liquid and still higher ones are
solid Aniline and other arylamines are usually colourless but get
coloured on storage due to atmospheric oxidation Lower aliphatic amines are soluble in water because they can form
hydrogen bonds with water molecules However, solubility decreases
with increase in molar mass of amines due to increase in size of the
hydrophobic alkyl part |
1 | 7137-7140 | Aniline and other arylamines are usually colourless but get
coloured on storage due to atmospheric oxidation Lower aliphatic amines are soluble in water because they can form
hydrogen bonds with water molecules However, solubility decreases
with increase in molar mass of amines due to increase in size of the
hydrophobic alkyl part Higher amines are essentially insoluble in water |
1 | 7138-7141 | Lower aliphatic amines are soluble in water because they can form
hydrogen bonds with water molecules However, solubility decreases
with increase in molar mass of amines due to increase in size of the
hydrophobic alkyl part Higher amines are essentially insoluble in water Considering the electronegativity of nitrogen of amine and oxygen of
alcohol as 3 |
1 | 7139-7142 | However, solubility decreases
with increase in molar mass of amines due to increase in size of the
hydrophobic alkyl part Higher amines are essentially insoluble in water Considering the electronegativity of nitrogen of amine and oxygen of
alcohol as 3 0 and 3 |
1 | 7140-7143 | Higher amines are essentially insoluble in water Considering the electronegativity of nitrogen of amine and oxygen of
alcohol as 3 0 and 3 5 respectively, you can predict the pattern of
solubility of amines and alcohols in water |
1 | 7141-7144 | Considering the electronegativity of nitrogen of amine and oxygen of
alcohol as 3 0 and 3 5 respectively, you can predict the pattern of
solubility of amines and alcohols in water Out of butan-1-ol and
butan-1-amine, which will be more soluble in water and why |
1 | 7142-7145 | 0 and 3 5 respectively, you can predict the pattern of
solubility of amines and alcohols in water Out of butan-1-ol and
butan-1-amine, which will be more soluble in water and why Amines
are soluble in organic solvents like alcohol, ether and benzene |
1 | 7143-7146 | 5 respectively, you can predict the pattern of
solubility of amines and alcohols in water Out of butan-1-ol and
butan-1-amine, which will be more soluble in water and why Amines
are soluble in organic solvents like alcohol, ether and benzene You
may remember that alcohols are more polar than amines and form
stronger intermolecular hydrogen bonds than amines |
1 | 7144-7147 | Out of butan-1-ol and
butan-1-amine, which will be more soluble in water and why Amines
are soluble in organic solvents like alcohol, ether and benzene You
may remember that alcohols are more polar than amines and form
stronger intermolecular hydrogen bonds than amines Primary and secondary amines are engaged in intermolecular
association due to hydrogen bonding between nitrogen of one and
hydrogen of another molecule |
1 | 7145-7148 | Amines
are soluble in organic solvents like alcohol, ether and benzene You
may remember that alcohols are more polar than amines and form
stronger intermolecular hydrogen bonds than amines Primary and secondary amines are engaged in intermolecular
association due to hydrogen bonding between nitrogen of one and
hydrogen of another molecule This intermolecular association is more
in primary amines than in secondary amines as there are two hydrogen
atoms available for hydrogen bond formation in it |
1 | 7146-7149 | You
may remember that alcohols are more polar than amines and form
stronger intermolecular hydrogen bonds than amines Primary and secondary amines are engaged in intermolecular
association due to hydrogen bonding between nitrogen of one and
hydrogen of another molecule This intermolecular association is more
in primary amines than in secondary amines as there are two hydrogen
atoms available for hydrogen bond formation in it Tertiary amines do
not have intermolecular association due to the absence of hydrogen
atom available for hydrogen bond formation |
1 | 7147-7150 | Primary and secondary amines are engaged in intermolecular
association due to hydrogen bonding between nitrogen of one and
hydrogen of another molecule This intermolecular association is more
in primary amines than in secondary amines as there are two hydrogen
atoms available for hydrogen bond formation in it Tertiary amines do
not have intermolecular association due to the absence of hydrogen
atom available for hydrogen bond formation Therefore, the order of
boiling points of isomeric amines is as follows:
9 |
1 | 7148-7151 | This intermolecular association is more
in primary amines than in secondary amines as there are two hydrogen
atoms available for hydrogen bond formation in it Tertiary amines do
not have intermolecular association due to the absence of hydrogen
atom available for hydrogen bond formation Therefore, the order of
boiling points of isomeric amines is as follows:
9 5
9 |
1 | 7149-7152 | Tertiary amines do
not have intermolecular association due to the absence of hydrogen
atom available for hydrogen bond formation Therefore, the order of
boiling points of isomeric amines is as follows:
9 5
9 5
9 |
1 | 7150-7153 | Therefore, the order of
boiling points of isomeric amines is as follows:
9 5
9 5
9 5
9 |
1 | 7151-7154 | 5
9 5
9 5
9 5
9 |
1 | 7152-7155 | 5
9 5
9 5
9 5 Physical
Physical
Physical
Physical
Physical
Properties
Properties
Properties
Properties
Properties
9 |
1 | 7153-7156 | 5
9 5
9 5 Physical
Physical
Physical
Physical
Physical
Properties
Properties
Properties
Properties
Properties
9 3
How will you convert
(i) Benzene into aniline (ii) Benzene into N, N-dimethylaniline
(iii) Cl–(CH2)4–Cl into hexan-1,6-diamine |
1 | 7154-7157 | 5
9 5 Physical
Physical
Physical
Physical
Physical
Properties
Properties
Properties
Properties
Properties
9 3
How will you convert
(i) Benzene into aniline (ii) Benzene into N, N-dimethylaniline
(iii) Cl–(CH2)4–Cl into hexan-1,6-diamine Intext Question
Intext Question
Intext Question
Intext Question
Intext Question
Write structures and IUPAC names of
(i) the amide which gives propanamine by Hoffmann bromamide
reaction |
1 | 7155-7158 | 5 Physical
Physical
Physical
Physical
Physical
Properties
Properties
Properties
Properties
Properties
9 3
How will you convert
(i) Benzene into aniline (ii) Benzene into N, N-dimethylaniline
(iii) Cl–(CH2)4–Cl into hexan-1,6-diamine Intext Question
Intext Question
Intext Question
Intext Question
Intext Question
Write structures and IUPAC names of
(i) the amide which gives propanamine by Hoffmann bromamide
reaction (ii) the amine produced by the Hoffmann degradation of benzamide |
1 | 7156-7159 | 3
How will you convert
(i) Benzene into aniline (ii) Benzene into N, N-dimethylaniline
(iii) Cl–(CH2)4–Cl into hexan-1,6-diamine Intext Question
Intext Question
Intext Question
Intext Question
Intext Question
Write structures and IUPAC names of
(i) the amide which gives propanamine by Hoffmann bromamide
reaction (ii) the amine produced by the Hoffmann degradation of benzamide (i) Propanamine contains three carbons |
1 | 7157-7160 | Intext Question
Intext Question
Intext Question
Intext Question
Intext Question
Write structures and IUPAC names of
(i) the amide which gives propanamine by Hoffmann bromamide
reaction (ii) the amine produced by the Hoffmann degradation of benzamide (i) Propanamine contains three carbons Hence, the amide molecule must
contain four carbon atoms |
1 | 7158-7161 | (ii) the amine produced by the Hoffmann degradation of benzamide (i) Propanamine contains three carbons Hence, the amide molecule must
contain four carbon atoms Structure and IUPAC name of the starting
amide with four carbon atoms are given below:
Butanamide
(ii) Benzamide is an aromatic amide containing seven carbon atoms |
1 | 7159-7162 | (i) Propanamine contains three carbons Hence, the amide molecule must
contain four carbon atoms Structure and IUPAC name of the starting
amide with four carbon atoms are given below:
Butanamide
(ii) Benzamide is an aromatic amide containing seven carbon atoms Hence, the amine formed from benzamide is aromatic primary amine
containing six carbon atoms |
1 | 7160-7163 | Hence, the amide molecule must
contain four carbon atoms Structure and IUPAC name of the starting
amide with four carbon atoms are given below:
Butanamide
(ii) Benzamide is an aromatic amide containing seven carbon atoms Hence, the amine formed from benzamide is aromatic primary amine
containing six carbon atoms Aniline or benzenamine
Example 9 |
1 | 7161-7164 | Structure and IUPAC name of the starting
amide with four carbon atoms are given below:
Butanamide
(ii) Benzamide is an aromatic amide containing seven carbon atoms Hence, the amine formed from benzamide is aromatic primary amine
containing six carbon atoms Aniline or benzenamine
Example 9 3
Example 9 |
1 | 7162-7165 | Hence, the amine formed from benzamide is aromatic primary amine
containing six carbon atoms Aniline or benzenamine
Example 9 3
Example 9 3
Example 9 |
1 | 7163-7166 | Aniline or benzenamine
Example 9 3
Example 9 3
Example 9 3
Example 9 |
1 | 7164-7167 | 3
Example 9 3
Example 9 3
Example 9 3
Example 9 |
1 | 7165-7168 | 3
Example 9 3
Example 9 3
Example 9 3
Solution
Solution
Solution
Solution
Solution
Rationalised 2023-24
266
Chemistry
Primary > Secondary > Tertiary
Intermolecular hydrogen bonding in primary amines is shown in
Fig |
1 | 7166-7169 | 3
Example 9 3
Example 9 3
Solution
Solution
Solution
Solution
Solution
Rationalised 2023-24
266
Chemistry
Primary > Secondary > Tertiary
Intermolecular hydrogen bonding in primary amines is shown in
Fig 9 |
1 | 7167-7170 | 3
Example 9 3
Solution
Solution
Solution
Solution
Solution
Rationalised 2023-24
266
Chemistry
Primary > Secondary > Tertiary
Intermolecular hydrogen bonding in primary amines is shown in
Fig 9 2 |
1 | 7168-7171 | 3
Solution
Solution
Solution
Solution
Solution
Rationalised 2023-24
266
Chemistry
Primary > Secondary > Tertiary
Intermolecular hydrogen bonding in primary amines is shown in
Fig 9 2 Boiling points of amines, alcohols and alkanes of almost the same
molar mass are shown in Table 9 |
1 | 7169-7172 | 9 2 Boiling points of amines, alcohols and alkanes of almost the same
molar mass are shown in Table 9 2 |
1 | 7170-7173 | 2 Boiling points of amines, alcohols and alkanes of almost the same
molar mass are shown in Table 9 2 Fig |
1 | 7171-7174 | Boiling points of amines, alcohols and alkanes of almost the same
molar mass are shown in Table 9 2 Fig 9 |
1 | 7172-7175 | 2 Fig 9 2 Intermolecular hydrogen bonding in primary amines
Table 9 |
1 | 7173-7176 | Fig 9 2 Intermolecular hydrogen bonding in primary amines
Table 9 2:
Comparison of Boiling Points of Amines, Alcohols and
Alkanes of Similar Molecular Masses
Sl |
1 | 7174-7177 | 9 2 Intermolecular hydrogen bonding in primary amines
Table 9 2:
Comparison of Boiling Points of Amines, Alcohols and
Alkanes of Similar Molecular Masses
Sl No |
1 | 7175-7178 | 2 Intermolecular hydrogen bonding in primary amines
Table 9 2:
Comparison of Boiling Points of Amines, Alcohols and
Alkanes of Similar Molecular Masses
Sl No Compound
Molar mass
b |
1 | 7176-7179 | 2:
Comparison of Boiling Points of Amines, Alcohols and
Alkanes of Similar Molecular Masses
Sl No Compound
Molar mass
b p |
1 | 7177-7180 | No Compound
Molar mass
b p /K
1 |
1 | 7178-7181 | Compound
Molar mass
b p /K
1 n-C4H9NH2
73
350 |
1 | 7179-7182 | p /K
1 n-C4H9NH2
73
350 8
2 |
1 | 7180-7183 | /K
1 n-C4H9NH2
73
350 8
2 (C2H5)2NH
73
329 |
1 | 7181-7184 | n-C4H9NH2
73
350 8
2 (C2H5)2NH
73
329 3
3 |
1 | 7182-7185 | 8
2 (C2H5)2NH
73
329 3
3 C2H5N(CH3)2
73
310 |
1 | 7183-7186 | (C2H5)2NH
73
329 3
3 C2H5N(CH3)2
73
310 5
4 |
1 | 7184-7187 | 3
3 C2H5N(CH3)2
73
310 5
4 C2H5CH(CH3)2
72
300 |
1 | 7185-7188 | C2H5N(CH3)2
73
310 5
4 C2H5CH(CH3)2
72
300 8
5 |
1 | 7186-7189 | 5
4 C2H5CH(CH3)2
72
300 8
5 n-C4H9OH
74
390 |
1 | 7187-7190 | C2H5CH(CH3)2
72
300 8
5 n-C4H9OH
74
390 3
Difference in electronegativity between nitrogen and hydrogen atoms and
the presence of unshared pair of electrons over the nitrogen atom makes
amines reactive |
1 | 7188-7191 | 8
5 n-C4H9OH
74
390 3
Difference in electronegativity between nitrogen and hydrogen atoms and
the presence of unshared pair of electrons over the nitrogen atom makes
amines reactive The number of hydrogen atoms attached to nitrogen
atom also decides the course of reaction of amines; that is why primary
(–NH2), secondary
N
H and tertiary amines
N
differ in many
reactions |
1 | 7189-7192 | n-C4H9OH
74
390 3
Difference in electronegativity between nitrogen and hydrogen atoms and
the presence of unshared pair of electrons over the nitrogen atom makes
amines reactive The number of hydrogen atoms attached to nitrogen
atom also decides the course of reaction of amines; that is why primary
(–NH2), secondary
N
H and tertiary amines
N
differ in many
reactions Moreover, amines behave as nucleophiles due to the presence
of unshared electron pair |
1 | 7190-7193 | 3
Difference in electronegativity between nitrogen and hydrogen atoms and
the presence of unshared pair of electrons over the nitrogen atom makes
amines reactive The number of hydrogen atoms attached to nitrogen
atom also decides the course of reaction of amines; that is why primary
(–NH2), secondary
N
H and tertiary amines
N
differ in many
reactions Moreover, amines behave as nucleophiles due to the presence
of unshared electron pair Some of the reactions of amines are described
below:
1 |
1 | 7191-7194 | The number of hydrogen atoms attached to nitrogen
atom also decides the course of reaction of amines; that is why primary
(–NH2), secondary
N
H and tertiary amines
N
differ in many
reactions Moreover, amines behave as nucleophiles due to the presence
of unshared electron pair Some of the reactions of amines are described
below:
1 Basic character of amines
Amines, being basic in nature, react with acids to form salts |
1 | 7192-7195 | Moreover, amines behave as nucleophiles due to the presence
of unshared electron pair Some of the reactions of amines are described
below:
1 Basic character of amines
Amines, being basic in nature, react with acids to form salts 9 |
1 | 7193-7196 | Some of the reactions of amines are described
below:
1 Basic character of amines
Amines, being basic in nature, react with acids to form salts 9 6
9 |
1 | 7194-7197 | Basic character of amines
Amines, being basic in nature, react with acids to form salts 9 6
9 6
9 |
1 | 7195-7198 | 9 6
9 6
9 6
9 |
1 | 7196-7199 | 6
9 6
9 6
9 6
9 |
1 | 7197-7200 | 6
9 6
9 6
9 6 Chemical
Chemical
Chemical
Chemical
Chemical
Reactions
Reactions
Reactions
Reactions
Reactions
Rationalised 2023-24
267
Amines
Amine salts on treatment with a base like NaOH, regenerate the
parent amine |
1 | 7198-7201 | 6
9 6
9 6 Chemical
Chemical
Chemical
Chemical
Chemical
Reactions
Reactions
Reactions
Reactions
Reactions
Rationalised 2023-24
267
Amines
Amine salts on treatment with a base like NaOH, regenerate the
parent amine Amine salts are soluble in water but insoluble in organic solvents
like ether |
1 | 7199-7202 | 6
9 6 Chemical
Chemical
Chemical
Chemical
Chemical
Reactions
Reactions
Reactions
Reactions
Reactions
Rationalised 2023-24
267
Amines
Amine salts on treatment with a base like NaOH, regenerate the
parent amine Amine salts are soluble in water but insoluble in organic solvents
like ether This reaction is the basis for the separation of amines from
the non basic organic compounds insoluble in water |
1 | 7200-7203 | 6 Chemical
Chemical
Chemical
Chemical
Chemical
Reactions
Reactions
Reactions
Reactions
Reactions
Rationalised 2023-24
267
Amines
Amine salts on treatment with a base like NaOH, regenerate the
parent amine Amine salts are soluble in water but insoluble in organic solvents
like ether This reaction is the basis for the separation of amines from
the non basic organic compounds insoluble in water The reaction of amines with mineral acids to form ammonium salts
shows that these are basic in nature |
1 | 7201-7204 | Amine salts are soluble in water but insoluble in organic solvents
like ether This reaction is the basis for the separation of amines from
the non basic organic compounds insoluble in water The reaction of amines with mineral acids to form ammonium salts
shows that these are basic in nature Amines have an unshared pair
of electrons on nitrogen atom due to which they behave as Lewis base |
1 | 7202-7205 | This reaction is the basis for the separation of amines from
the non basic organic compounds insoluble in water The reaction of amines with mineral acids to form ammonium salts
shows that these are basic in nature Amines have an unshared pair
of electrons on nitrogen atom due to which they behave as Lewis base Basic character of amines can be better understood in terms of their Kb
and pKb values as explained below:
K =
3
2
2
R
OH
R
H
NH
NH
O
2
or
K[H O]
=
3
2
O
H
N H
H
R
R
N
or
Kb
=
3
2
O
N H
NH
H
R
R
pKb = –log Kb
Larger the value of Kb or smaller the value of pKb, stronger is the
base |
1 | 7203-7206 | The reaction of amines with mineral acids to form ammonium salts
shows that these are basic in nature Amines have an unshared pair
of electrons on nitrogen atom due to which they behave as Lewis base Basic character of amines can be better understood in terms of their Kb
and pKb values as explained below:
K =
3
2
2
R
OH
R
H
NH
NH
O
2
or
K[H O]
=
3
2
O
H
N H
H
R
R
N
or
Kb
=
3
2
O
N H
NH
H
R
R
pKb = –log Kb
Larger the value of Kb or smaller the value of pKb, stronger is the
base The pKb values of few amines are given in Table 9 |
1 | 7204-7207 | Amines have an unshared pair
of electrons on nitrogen atom due to which they behave as Lewis base Basic character of amines can be better understood in terms of their Kb
and pKb values as explained below:
K =
3
2
2
R
OH
R
H
NH
NH
O
2
or
K[H O]
=
3
2
O
H
N H
H
R
R
N
or
Kb
=
3
2
O
N H
NH
H
R
R
pKb = –log Kb
Larger the value of Kb or smaller the value of pKb, stronger is the
base The pKb values of few amines are given in Table 9 3 |
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