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Question

The EAN of metal atoms in Fe(CO)2(NO)2 and Co2(CO)8 respectively are :

A
34, 35
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B
34, 36
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C
36, 36
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D
36, 35
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Solution

The correct option is C 36, 36
In Fe(CO)2(NO)2, Fe has 26 electron and it get 8 electron due to ligands and 2 electron due to negative valency so its EAN is 26+2+8=36.
In Co2(CO)8, Co has 27 electron and one electron due to covalent bond and 8 electron due to ligands so EAN =27+1+8=36.

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