Question
Write a note about structure of Amines.
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Answer
1. Nitrogen atom of amines is trivalent and carries a lone pair of electron and $s p^3$ hybridised, out of the four $sp ^3$ hybridised orbitais of nitrogen, three $sp ^3$ orbitais overlap with orbitais of hydrogen (or) alkyl groups of carbon, the fourth $sp ^3$ orbital contains a lone pair of electron. Hence, amines posses pyramidal geometry.
2. Due to presence of lone pair of electron C – N – H (or) C – N – Cbond angle is less than the normal tetrahedral bond angle 109.5v. For example, the C – N – C bond angle of trimethylamine is 108°. This is due to the repulsion between the bulky methyl groups.
2. Due to presence of lone pair of electron C – N – H (or) C – N – Cbond angle is less than the normal tetrahedral bond angle 109.5v. For example, the C – N – C bond angle of trimethylamine is 108°. This is due to the repulsion between the bulky methyl groups.
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