G. Wei, C. C. Allen, T. Hambley
Sep 15, 1997
Citations
0
Influential Citations
6
Citations
Journal
Inorganica Chimica Acta
Abstract
Abstract During extended equilibration of the potentially sexidentate ligand 6-amino-6-methyl-1, 11-dithia-4,8-diazacyclotetradecan-13-ol with cobalt ion at elevated temperature in acid in the presence of activated carbon, we observed loss of the secondary alcohol. An X-ray crystal structure characterised the hydrogenolysis product (6-amino-6-methyl-1, 11-dithia-4,8-diazacyclotetradecane) chlorocobalt(III) which crystallises in the P2 1 a space group, a = 24.800(16), b = 9.743(5), c = 26.707(9), A, β = 98.65(4)°. The cobalt ion lies in a distorted octahedral environment with the secondary amines and thioethers of the macrocycle as well as the pendant primary amine coordinated, and a chloride ion bound cis to the primary amine. Saturation of the bonds to the carbon once bonded to the alcohol group is defined by standard single CC distances (1.47–1.53 A) and albeit distorted tetrahedral geometry around all carbon centres in the carbon chain linking the secondary thioethers, supported by NMR spectroscopy.