Questions
Among the following metal carbonyls, the C – O bond order is lowest in
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a
MnCO6+
b
FeCO5
c
CrCO6
d
VCO6−
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Correct option is D
Carbon-oxygen bond order in ‘CO’ is three ;In metal carbonyls C-O bond order will be between 2-3;Due to back bonding M-C bond will have bond order of 1-2;Back bonding is due to donation of electron pair from metal to carbon of ‘CO’ into its π* ABMO.In option (4) the complex have negative charge, so backdonation by metal is high.∴M-C bond order increases.Ultimately C-O bond order decreases.Similar Questions
Which of the following is formed when n-butyl lithium reacts with tin (II) chloride?
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