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(CH₃)₂NH (secondary) has one N-H bond, while CH₃CH₂NH₂ (primary) has two, leading to less hydrogen bonding and a lower boiling point, as per the PDF.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
Dimethylamine ((CH₃)₂NH), a secondary amine, has one N-H bond to donate and one lone pair to accept, forming two hydrogen bonds, as per the PDF’s solubility.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Reaction with Nitrous Acid and Diazonium Salts - Part 1
In (CH₃)₂NH, nitrogen forms two sigma bonds with carbon atoms and one with hydrogen, totaling three sigma bonds, as per the PDF’s structure discussion.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Chemical Reactions - Carbylamine Reaction and General Reactions
In CH₃NHCH₃, nitrogen has three sigma bonds (two C, one H) and one lone pair, giving a pyramidal shape due to sp3 hybridization, as per the PDF’s structure.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Chemical Reactions - Alkylation, Acylation and Electrophilic Substitution
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