Sp. Sovilj et K. Babic-samardzija, Cobalt(III) complexes with a tetraaza macrocyclic ligand and some heterocyclic dithiocarbamates, SYN REAC IN, 29(9), 1999, pp. 1655-1671
Citations number
27
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
SYNTHESIS AND REACTIVITY IN INORGANIC AND METAL-ORGANIC CHEMISTRY
Four new cobalt(III) complexes of the general formula [Co(Rdtc)cyclam](ClO4
)(2), where cyclam and Rdtc(-) refer to 1,4,8,11-tetraazacyclotetradecane a
nd 2-, 3-, 4-methylpiperidine (2-, 3-, 4-wMeepipdtc(-)) or 4-thiomorpholine
(Timdtc(-)) dithiocarbamates, respectively, have been prepared. Elemental
and thermal analyses, VIS, IR and H-1 and C-13 NMR spectroscopy have been u
sed to characterized them. In the complexes, cobalt is hexa-coordinated in
an octahedral geometry of a folded macrocyclic ligand and dithiocarbamates
are bound as bidentates. As regards to the influence of the position of the
methyl group on the piperidine ring, the nu(C - N) and nu(C - S) values in
crease in the order 2-Mepipdtc(-) < 3-Mepipdtc(-) < 4-Mepipdtc(-). Furtherm
ore, the position of the methyl substituent also influences the thermal sta
bility of the complexes and the order of stability decreases in the opposit
e order.