C. Regassa et N. Retta, ORGANIC AMINES REDUCE TRANS-DICHLOROTETRAKIS(PYRIDINE)COBALT(III) CHLORIDE TO COBALT(II), Transition metal chemistry, 21(1), 1996, pp. 5-6
The reaction of dichlorotetrakis(pyridine)cobalt(III) chloride, [CoCl2
(Py)(4)]Cl, with alkyl- or arylamines in EtOH or i-PrOH yielded [CoCl2
(Py)(2)] in all cases. This reduction of Co-III to Co-II takes place o
nly in the presence of the amines. [CoCl2(Py)(2)] in EtOH is oxidized
by Cl-2 gas and in the presence of pyridine gives [CoCl2(Py)(4)](+), w
hile in pyridine alone [CoCl2(Py)(4)] is formed.