Which of the following complex species does not obey EAN rule? |
[Cu(CN)4]3- [Cr(NH3)6]3+ [Fe(CN)6]4- [Ni(CO)4] |
[Cr(NH3)6]3+ |
EAN is effective atomic number and it is represented as: EAN = Z - (O.N) + 2(C.N) or number of lone pairs donated to central atom where Z = atomic number O.N. = oxidation number C.N. = coordination number In [Cr(NH3)6]3+ x + 6(0) = +3 x = 3 Cr3+ (Z = 24) EAN = 24 - 3 + 2(6) = 21 + 12 = 33 |