Choose the correct option regarding the following complex compound which follows (F) and does not follow (NF) the Sidgwick EAN rule : (I) Ph3P2PdCl2PdCl2 (II) [NiBrCl(en)] (III) Na4Fe(CN)5NOS (IV) Cr(CO)3(NO)2

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(I) - NF (II) - NF (III) - NF (IV)-NF

(I) - F (II) - F (III) - NF (IV) -F

(I) - NF (II) - NF (III) - F (IV) - F

(I) - NF (II) - NF (III) - F (IV) - NF

answer is C.

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Detailed Solution

(I) Ph3P2PdCl2PdCl2; EAN of Pd=46−2+4×2=52 (II) [NiBrCl(en)]: EAN of Ni=28−2+8=34 (III) Na4Fe(CN)5NOS; EAN of Fe=26−2+5×2+2=36[Kr] (IV) Cr(CO)3(NO)2; EAN of Cr=24−0+3×2+3×2=36[Kr]

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