Polarization of electrons in acrolein may be written as:

Options

A. `overset(delta-)CH_(2)=CH-overset(delta+)CH=O`
B. `overset(delta-)CH_(2)=CH-CH=overset(delta+)O`
C. `overset(delta-)CH_(2)=overset(delta-)CH-CH=O`
D. `overset(delta+)CH_(2)=CH-CH=overset(delta-)O`

Answer

D

Explanation

Because of - R effect of -CHO group oxygen has `delta`-charge and the terminal carbon atom has `delta` + charge
`thereforeoverset(delta+)CH_(2)=CH-CH=overset(delta-)O`