Question

Specify the oxidation numbers of the metals in the following coordination entities: 
(i)\( [Co(H_2O)(CN)(en)_2] ^{2+}\)
(ii) \([CoBr_2(en)_2]^{+}\)
(iii)\( [PtCl_4]^{ 2–} \)
(iv) \(K_3[Fe(CN)_6]\)
(v) \([Cr(NH_3)_3Cl_3] \)

Answer 1

(i)\([Co(H_2O)(CN)(en)_2]^{2+}\)
Let the oxidation number of \( Co\) be x. 
The charge on the complex is\( +2.\)

 

(ii)\([Pt(Cl)_4]^{2-}\)
Let the oxidation number of Pt be \(x.\)
 The charge on the complex is\( - 2.\)