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

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 $SP ^3$, which is not a planar structure. All other are 6 members planar structure.

$SP^2$ hybridisation with planar structure.

$SP^2$ hybridisation with planar structure.

$SP^2$ hybridisation with planar structure.

$SP^2$ hybridisation with planar structure.


$SP^3$ hybridization of each Phosphorous.