Which of the following has highest `C-C` bond length among the following ?

Options

A. `[PtCl_(3)(C_(2)H_(4))]^(-)`
B. `[PtCl_(3)(C_(2)F_(4))]^(-)`
C. `C_(2)H_(4)`
D. `C_(2)F_(4)`

Answer

B

Explanation

Due to -I effect of F in `C_(2)F_(4)` , the ligand has strong tendency to accept electron from C.A. into their vacant `pi^(*)` orbitals, thus, increasing C-C B.L.