Trinuclear Gold(I) Complexes with Various Coordination Modes of N,N-dimethyldithiocarbamate |
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| Authors: | Eduardo J Fernández José M López-de-Luzuriaga Miguel Monge Elena Olmos Antonio Laguna M Dolores Villacampa Peter G Jones |
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| Institution: | (1) Departamento de Química, Universidad de La Rioja, Grupo de Síntesis Química de La Rioja, UA-CSIC, Obispo Bustamante 3, E-26001 Logroño, Spain;(2) Departamento de Química Inorgánica, Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza-CSIC, E-50009 Zaragoza, Spain;(3) Institüt für Anorganische und Analytische Chemie der Technischen Universität, Postfach 3329, D-38023 Braunschweig, Germany |
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| Abstract: | The compounds Au3(S2CNMe2)3{
3-(PPh2)3CH]} (1) and Au3(S2CNMe2)(-S2CNMe2){
3-(PPh2)3CH}]ClO4 (2) are obtained by reaction of Au3Cl3{
3-(PPh2)3CH}] with three equivalents of sodium dimethyldithiocarbamate or two equivalents of the same reagent in the presence of excess NaClO4. Reaction of 2 with the group 11 metal complexes AuCl(tht)], CuCl or Au(C6F5)(tht)] takes place with displacement of M(S2CNMe2)]n (M=Cu, Au) and formation of the new complexes Au3X(-S2CNMe2){
3-(PPh2)3CH}]ClO4 (X=Cl (3), X=C6F5 (4)); further reaction of 3 with Ag(OClO3)(tht)] (tht=tetrahydrothiophene) affords the dicationic species Au3(-S2CNMe2){
3-(PPh2)3CH}(tht)](ClO4)2 (5). Treatment of Au3Cl3{
3-(PPh2)3CH}] with one equivalent of NaS2CNMe2 allows the substitution of only one chlorine atom, giving rise to the complex Au3Cl2(S2CNMe2){
3-(PPh2)3CH}] (6), in which the dithiocarbamate ligand acts as monodentate rather than bidentate bridging as observed in compounds 3–5. The crystal structures of complexes 1 and 2 have been established by X-ray diffraction studies and show close gold–gold contacts. |
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| Keywords: | gold dithiocarbamate tris(diphenylphosphino)methane gold– gold interactions |
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