ANIONOPENTAAMINECOBALT(III) COMPLEXES WITH POLYAMINE LIGANDS .13. SYNTHESIS AND CHARACTERIZATION OF SOME ISOMERS OF CHLORO(DIETHYLENE-TRIAMINE)BIS(MONOAMINE)COBALT(III) COMPLEXES

The reaction of mer-CoCl3(dien0 with greater than 2.5 mol equivalents of several monoamines, A (A = methylamine, ethylamine, n-propylamine, n-butylamine, i-butylamine, n -pentylamine, n-hexylamine, benzylamine, cyclohexylamine, cyclohexymethylamine pyridine, 3,5-dimethylpyridine, 3-ethyl-4-methylpyridine, 4-benzylpyridine and 4-n-propylpyridine) in aqueaous or aqueous methanol solution produces various amounts of rac-unsym-fac-X-a,bcf,de-CoCl(dien)(A)2+2, mer-cis-a,bcd,ef-CoCl(dien)(A)2+2 and trans-af,bcd,e-ClCl2(dien)(A)+. The chloropentaaminecobalt(III) complexes were isolated as ZnCl2-4 salts and the green trans-dichloro complexes as the perchlorates. The isomeric purity and composition was established on the basis of C-13 NMR and i.r. spectra and the unsym-fac-cis- geometry was confirmed by the resolution of the complexes with A = n-pentylamine and pyridine. © 1978.