1.

Choose the correct option regarding the following complex compound which follwos (F) and does not follow (NF) the Sidgwick EAN rule: (I) [Ph_(3)P)_(2)PdCl_(2)PdCl_(2)] (II) [NiBrCl(en)] (III) Na_(4)[Fe(CN)_(5)NOS] (IV) Cr(CO)_(3)(NO)_(2)

Answer»

(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

Solution :(I) `[(Ph_(3)P)_(2)PdCl_(2)PdCl_(2)],EAN` of Pd=46-2+4`xx2=52`
(II) `[NiBrCl(en)]:` EAN of Ni=28-2+8=34
(III) `[Na_(3)[Fe(CN)_(5)NOS],` EAN of Fe=26-2+`5xx2+2=36`[KR]
(IV) `Cr(CO)_(3)(NO)_(2),`EAN of
`Cr=24-0+3xx2+3xx2=36[Kr]`.


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