Consider the d8 metal complex [Ni(en)(Cl)2(NH3)2]n+. Which of the following statements is correct concerning this metal complex? (Note: en = ethylenediamine)
(i) The oxidation state of Ni is 2+
(ii) n = 0 (i.e. the overall charge of the metal complex is zero)
(iii) The coordination number is 5
I'm pretty sure that i and ii are correct, can anyone validate this for me?