Australian Journal of Chemistry Australian Journal of Chemistry Society
An international journal for chemical science

Phosphorus-31, cadmium-113 and mercury-199 N.M.R. studies on dithiolate complexes of cadmium and mercury and their phosphine adducts

AM Bond, R Colton, D Dakternieks, ML Dillon, J Hauenstein and JE Moir

Australian Journal of Chemistry 34(7) 1393 - 1400
Published: 1981


Phosphorus-31, cadmium-113 and mercury-199 n.m.r. spectra have been recorded for a series of O,O-dialkyldithiophosphate (dtp) and dialkyldithiocarbamate (dtc) complexes of cadmium and mercury in dichloromethane solution. Both types of ligand are labile on the n.m.r. time scale at room temperature, although the exchange of dtc ligands can be slowed at low temperatures.

.The complexes interact with tributylphosphine and tricyclohexylphosphine (pcy), but at room temperature the phosphines are also labile. At low temperatures, however, the phosphine exchange becomes slow on the n.m.r. time scale to allow identification of the adducts except for Cd(dtc)2 adducts with PBu3 which are still labile at -110°C.

All the data indicate that cadmium has a lower affinity for phosphine than mercury and that dtc ligands are more strongly bound to the metals than dtp ligands.

© CSIRO 1981

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