Number of following molecules showing planar symmetry is.

Question

Number of following molecules showing planar symmetry is. (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

(a) is not planar
(b) Ring is planar but hydrogens are not
(c) Benzene is planar
(d) The expected hybridization of

N

in Pyrrole is

s p^{3}

but the unavailability of the lone pair and partial double bond character with

N \equiv C

bonds, makes this molecule planar.
(e) The expected hybridization of

O

in furan is

s p^{3}

but one of the

2

lone pairs gets involved in resonance. Hence, the effective hybridization is

s p^{2}

which means, furan is planar.

Q. Number of following molecules showing planar symmetry is________.