Abstract
The title cobalt(III) complexes have been investigated by polarized absorption and Raman spectroscopies of the single crystals. The symmetry properties of the d-electron orbitals and of the vibrational modes attributable to the Raman bands of trans(Cl 2)-[CoCl 2(NH 3) n (H 2O) 4− n ]Cl complexes ( n = 2, 3, or 4) were examined to elucidated the peculiar observation that ligand substitution causes no splitting of the 15 200-cm −1 absorption band and the 250-cm −1 Raman band. Effects of replacing the NH 3 ligand with H 2O on the electronic structure, atom–atom force constants and vibrational modes of these complex ions are briefly described.
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