Question
Question: Which of the following is not a correct statement for primary aliphatic amines?...
Which of the following is not a correct statement for primary aliphatic amines?
The intermolecular association in primary amines is less than the intermolecular association in secondary amines.
Primary amines can be prepared by the Gabriel phthalimide synthesis.
Primary amines on treating with nitrous acid solution generally form alcohols
Primary amines are less basic than the secondary amines in gaseous phase
The intermolecular association in primary amines is less than the intermolecular association in secondary amines.
Solution
Primary amines have two N-H bonds, enabling more extensive hydrogen bonding than secondary amines which have only one N-H bond. Thus, intermolecular association in primary amines is greater, not less, than in secondary amines. Statements (2), (3), and (4) are correct chemical facts: Gabriel synthesis yields primary amines, primary aliphatic amines react with nitrous acid to form alcohols, and secondary amines are more basic than primary amines in the gaseous phase due to the greater inductive effect of two alkyl groups.