Total number of species among following which can use any one -orbital in back bonding

CHEMISTRY · Subjective · CBSE · Chemistry · Chemical Bonding and Molecular Structure · Chemical Bonding and Molecular Structure

Problem

Total number of species among following which can use any one

t_{2g}

d

-orbital in back bonding.

\text{H}_4\text{SiO}_4

\text{H}_2\text{NBF}_2

\text{O}(\text{SiH}_3)_2

\text{CCl}_2

\text{N}(\text{SiH}_3)_3

(\text{BN})_x

\text{R}_3\text{PO}

\text{P}_4\text{O}_{10}

\text{CCl}_3^-