question_answer

The no. of o and n bonds in allyl isocyanides are:

A) \[9\sigma ,\,\,3\pi \]

B)               \[9\sigma ,\,\,9\pi \]

C) \[3\sigma ,\,\,4\pi \]                    

D) \[5\sigma ,\,\,7\pi \]

Correct Answer: A

Solution :

\[9\sigma ,\,\,3\pi \,\operatorname{bonds}\] \[\operatorname{Allyl} isocyanide, ie,\] \[{{\operatorname{CH}}_{2}}=CH-C{{H}_{2}}-Na\underrightarrow{=}c\] \[\sigma -\operatorname{bond}\,\,-:\]it is formed by head - on overlapping of atomic orbitals therefore overlapping is large. \[\pi \operatorname{bond}\,\,-:\]it is formed by sideway overlapping which small.