1.

Which of the following coordinate complexes is an exception to EAN rule? (Given At. No. Pt =78, Fe=26, Zn=30, Cu=29]

Answer»

`[Pt(NH_(3))(6)]^(4+)`
`[FE(CN)(6)]^(4-)`
`[Zn(NH_(3))_(4)]^(2+)`
`[Cu(NH_(3))_(4)]^(2+)`

Solution :EAN = Z-X +Y
(a) EAN = 78-4+12=86
b) EAN = 26-2+12=36
C) EAN 30-2 +8 = 36
(d) EAN = 29-2+8=35


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