The effective atomic number (EAN) of Co(CO)_4 | vedclass

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(D) The $EAN$ of $Co(CO)_4$ is calculated as: $27 + (4 	imes 2) = 35$. Since $35 
eq 36$,it does not follow the Sidgwick $EAN$ rule. It can attain s

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Both $(b)$ and $(c)$

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(D) The $EAN$ of $Co(CO)_4$ is calculated as: $27 + (4 	imes 2) = 35$. Since $35 
eq 36$,it does not follow the Sidgwick $EAN$ rule. It can attain stability by gaining one electron (reduction of $Co$) to form $[Co(CO)_4]^-$,or by dimerization to form $Co_2(CO)_8$,where each $Co$ atom effectively shares an electron,resulting in an $EAN$ of $36$ for each $Co$ atom.

The effective atomic number $(EAN)$ of $Co(CO)_4$ is $35$ and hence it is less stable. It attains stability by

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