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Complexes of cobalt(III) with d-glucosamine and amines

✍ Scribed by Sergio Bunel; Carmen Ibarra; Exequiel Moraga; Víctor Calvo; Andrei Blaskó; Clifford A. Bunton

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
712 KB
Volume
239
Category
Article
ISSN
0008-6215

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✦ Synopsis

ABSTRACX o-Gl~amine and ammonia, 1,2_ethylenediamine, or l,lO-phenanthroline form complexes with Co(IID *. The complexes are: [Co@IH,)s~H,O .o-glucosamine]3+, [Co(en)Z.o-glucosamine]2' and [Co(phen),.o-glucosamine]'+.

Formation of the last two complexes is stereospecific with Co(III), with predominance of the A over the A diastereomer. The A and A diastereomers of the ethylenediamine and phenanthroline complexes with o-glucosamine were separated and their configurations about CoGID assigned from the CD and ORD spectra. The ethylenediamine complex has pK, u 3.4 and is more acidic than the other complexes, pointing to coordination of the alkoxide residue at position 1 of glucosamine.

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