Each of the following pairs of complexes contains identical numbers of d electrons, but in each pair,

Question:

Each of the following pairs of complexes contains identical numbers of d electrons, but in each pair, one complex is high-spin and the other is low-spin. In each case, predict which is high-spin and which is low-spin, and give the number of unpaired electrons present in each complex. (a) [Cr(HO)]+ (b) [Fe(HO)]2+ (c) [Co(HO),]+ and [Mn(CN)6]- and [Ru(HO)]+ and [Co(CN); (HO)]-