Preparation and photochemistry of cobalt(III) amino and amino acidato complexes containing tripodal polypyridine ligands.
The photochemical reactivities of cobalt(III)-diamine and cobalt(III)-amino acid compounds have been compared using complexes that also contain polypyridyl ligands. Metallacyclic complexes result from UV-induced photodecarboxylation reactions of the amino acid complexes. UV-irradiation of closely related complexes with amine donors replacing the carboxylate donors does not lead to the production of the same metallacyclic products. The reported UV-induced fragmentation of amine donors and subsequent metallacycle formation appears not to be a general reaction. Nine cobalt(III) complexes of polypyridyl ligands have been structurally characterised, including four that also contain amino acid ligands and one that contains a three-membered metallacyclic ring.
Otter
Carl A
CA
Department of Chemistry, University of Canterbury, Private Bag 4800, Christchurch, New Zealand.
Hartshorn
Richard M
RM
D000588:Amines / Q000737:chemistry*; D000596:Amino Acids / Q000737:chemistry*; D003035:Cobalt / Q000737:chemistry*; D018360:Crystallography, X-Ray; D008956:Models, Chemical; D008958:Models, Molecular; D015394:Molecular Structure; D010777:Photochemistry; D011725:Pyridines / Q000737:chemistry
D000588:Amines; D000596:Amino Acids; D011725:Pyridines; D003035:Cobalt