The temperature dependence of the visible/ultraviolet spectra of some cobalt, vitamin B-12 model, compounds.
The visible/ultraviolet spectra of aqua- and pyridine-alkyl(10-hydroxyimino-3,9-dimethyl-4,8-diazaundeca-3,8-dien-2-oneoximato,-N,N',N'',N''')cobalt perchlorates have been found to be very sensitive to temperature. The phenomenon fits the explanation of an equilibrium between two forms of complex, one with a short and the other a long cobalt-ligand bond.
D003035:Cobalt; D011725:Pyridines; D013053:Spectrophotometry; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D014805:Vitamin B 12
D011725:Pyridines; D003035:Cobalt; D014805:Vitamin B 12