Question

Which is not an anionic complex?

a)[Cu(NH3)4]Cl2
b)K4[Fe(CN)6]
c) K3[Fe(CN)6]
d)[NiCl4]

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Answer 1

Option (a) [Cu(NH3)4]Cl2 is not a anionic complex

A negatively charged complex ion is called an anionic complex. complex ion is an anion, the name of the metal ends with the suffix –ate.

[Cu(NH3)4]Cl2 = [ Cu(NH3)4] + 2cl2-

where in 2cl2-

• X = 2(-1) = -2
• where [Cu(NH3)4] is +2
• so it is a cationic complex