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Issue 3, 1998
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Preparation and structural studies of neutral oxorhenium(V) complexes with D-penicillamine methyl ester

Abstract

Reaction of oxorhenium(V) gluconate with D-penicillamine methyl ester (methyl 3-sulfanylvalinate) yielded three neutral 1∶2 complexes. For two complexes (1 and 2) the 1H NMR spectrum in (CD3)2SO shows the presence of a deprotonated and a neutral nitrogen donor group in the ReO(NS)2 system which is an unusual co-ordination mode for bidentate N,S ligands. Complex 1, [ReO{SC(CH3)2CH(CO2CH3)NH2}{SC(CH3)2CH(CO2CH3)NH}], possibly containing in non-co-ordinating solvents an ester oxygen co-ordinated trans to the Re[double bond, length half m-dash]O group, is able to bind a water molecule trans to the oxo core to give species 2. In aqueous solution the mixed-ligand complex [ReO{SC(CH3)2CH(CO2CH3)NH2}{SC(CH3)2CH(CO2)NH2}] 3 was unexpectedly formed out of 1 and 2. It contains bidentate D-penicillamine methyl ester and tridentate D-penicillamine in a co-ordination geometry similar to that of the known D-penicillamine complex [ReO{SC(CH3)2CH(CO2H)NH2}{SC(CH3)2CH(CO2)NH2}] 4. Complexes 3 and 4 were structurally characterized by X-ray diffraction.

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J. Chem. Soc., Dalton Trans., 1998, 455-460
Article type
Paper

Preparation and structural studies of neutral oxorhenium(V) complexes with D-penicillamine methyl ester

S. Kirsch, B. Noll, H. Spies, P. Leibnitz, D. Scheller, T. Krueger and B. Johannsen, J. Chem. Soc., Dalton Trans., 1998, 455
DOI: 10.1039/A706127G

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