Which of the following carbonyls will have the strongest \[C-O\] bond? – McqOptions

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1.	Which of the following carbonyls will have the strongest \[C-O\] bond?
A.	\[{{[Mn{{\left( CO \right)}_{6}}]}^{+}}\]
B.	\[[Cr{{\left( CO \right)}_{6}}]\]
C.	\[{{[V{{\left( CO \right)}_{6}}]}^{-}}\]
D.	\[\left[ Fe{{\left( CO \right)}_{5}} \right]\]
Answer» B. \[[Cr{{\left( CO \right)}_{6}}]\]

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