write down the iupac name for each of the following complexes and indicate the oxidation state, electronic configuration and coordination number. also give stereochemistry and magnetic moment of the complex: (i) k[cr(h2o)2(c2o4)2].3h2o (ii) [co(nh3)5cl]cl2 (iii) [crcl3(py)3] (iv) cs[fecl4] (v) k4[mn(cn)6]