Co-Ordination Compounds Question 264
Question: Which of the following carbonyls will have the strongest $ C-O $ bond?
Options:
A) $ {{[Mn{{( CO )}_6}]}^{+}} $
B) $ [Cr{{( CO )}_6}] $
C) $ {{[V{{( CO )}_6}]}^{-}} $
D) $ [ Fe{{( CO )}_5} ] $
Show Answer
Answer:
Correct Answer: A
Solution:
As positive charge on the central metal atom increases, the less readily the metal can donate electron density into the $ \pi * $ orbitals of CO ligand (donation of electron density into $ \pi * $ orbitals of CO result in weakening of $ C-O $ bond).
Hence, the $ C-O $ bond would be strongest in $ {{[Mn{{(CO)} _6}]}^{+}}.$
