Journal of the Chemical Society, Dalton Transactions p. 1477 - 1484 (1992)
Update date:2022-07-31
Topics:
Alcock, Nathaniel W.
Culver, Jane
Roe, S. Mark
Seven complexes of general type Ph2MX2 with X = carboxylate or dithiocarbamate have been prepared and their molecular structures determined (M = Sn, X = O2CMe, O2CCH2Cl, or S2CNEt2; M = Te, X = O2CCCl3, S2CNEt2, S2CNEtPh, or S2CNPh2).All but one show unsymmetrical bidentate co-ordination by the carboxylate or dithiocarbamate ligands; the tellurium complexes show substantially greater differences between the longer and shorter M-O or M-S distances.The presence of the lone pair transforms the co-ordination geometry from approximately tetrahedral (M = Sn) to pseudo-trigonal bipyramidal (M = Te).Replacing carboxylates by dithiocarbamate has a modest effect when M = Te, but in the tin compound the sulfur ligand co-ordination is almost symmetrical.This contrasts with the unsymmetrical bonding in Me2Sn(S2CNEt2)2.
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