Which complex is expected to have the strongest C-O bond?
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
In metal carbonyls, stronger metal 
back-donation weakens the 
bond. The more electron-rich the, metal (higher d-electron count/negative charge, lower oxidation state), the weaker the 
bond. Among the choices, 
has the most electron poor metal center (cationic, Mn in +1 ), giving least back-bonding and hence the strongest 
bond (highest 
).
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