Question

How many number of the following substances contains hexagonal planar rings in their structures?
Graphite, $(BN,B_3{N}_3{H}_6,C_6{H}_6,B_2{H}_6,H_3{P}_3{O}_9$

Answer 1

Answer: 4

From below structures we can see that all are $6$ member ring except $B_2{H}_6$ and in case of $H_3{P}_3{O}_9$ hybridisation of $P$ is $S{P}^3$, which is not a planar structure. All other are 6 members planar structure.

$S{P}^2$ hybridisation with planar structure.

$S{P}^2$ hybridisation with planar structure.

$S{P}^2$ hybridisation with planar structure.

$S{P}^2$ hybridisation with planar structure.


$S{P}^3$ hybridization of each Phosphorous.