Question

In which of the following molecular species axial bond length is shorter than equatorial bond length?

• A. ${PF}_2{Cl}_3$
• B. ${PF}_5$
• C. ${XeO}_3{F}_2$
• D. ${IO}_2{F}_2^{-}$

Answer 1

The correct option is A ${PF}_2{Cl}_3$

In $P{F}_{2}C{l}_3$ Axial bond length in shorter than equatorial Because on axial position $F$ atom present so $EN$ is more between $P$ & $F$ atom

Most $E.N$ atom, so $P-F$ bond length are shorter