Question

In which of the following cases M-F bond has partial double bond character where M is the central atom.

• A. ${OF}_2$
• B. ${PF}_3$
• C. ${CCl}_{3}F$
• D. All of these

Answer 1

Answer: (B)

${PF}_3$

In oxygen (N) and Carbon (C) there is no any vacant orbital in which other atoms like fluorine and chlorine can donate their lone pair. Therefore there will be no any partial double bond character. But in phosphorus (P) there is vacant d-orbitals therefore it shows partial double bond character.