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Which is not true about metal carbonyls?
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By Expert Faculty of Sri Chaitanya
a
Here CO acts as a Lewis base as well as l,ewis acid
b
Here metal acts as Lewis base as well as Lewis acid
c
Here dπ−pπ back bonding takes place
d
Here pπ−pπ back bonding takes place
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Correct option is D
CO is called π-acid ligand. In metal carbonyl complexes, there is donation of an electron pair from carbon to the empty orbital of metal and then simultaneously a back π-bonding is formed by sideways overlap of a filled orbital on the metal with empty antibonding π2py∗ orbital of CO.
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The d-electron configuration of and respectively are:
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