Ligand Field Analysis of the Electronic Spectra of [M(H2O)6]3+, [M(NH3)6]3+, [M(en)3]3+, [M(chxn)3]3+ and [M(tacn)2]3+ Complexes (M = CoIII, RhIII, IrIII). Spectrochemical Strength and Nephelauxetic Effect of Aqua, Ammine and Amine Ligands.