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Fixation modes of gold(III) from solutions using cadmium(II) dithiocarbamates: Preparation, supramolecular structure and thermal behaviour of polynuclear and heteropolynuclear gold(III) complexes: bis(N,N-dialkyldithiocarbamato-S,S’)gold(III) polychlorometallates, [Au(S2CNR2)2]nX (n =1: X = [AuCl4]–; n = 2: X = [CdCl4]2–, [Cd2Cl6]2–)
Institute of Geology and Nature Management, Far East Branch, Russian Academy of Sciences, Blagoveshchensk.
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Industriell miljö- och processteknik.
Institute of Chemistry, Far Eastern Branch of the Russian Academy of Sciences.
Institute of Geology and Nature Management, Far East Branch, Russian Academy of Sciences, Blagoveshchensk.
Vise andre og tillknytning
2012 (engelsk)Inngår i: Polyhedron, ISSN 0277-5387, E-ISSN 1873-3719, Vol. 40, nr 1, s. 53-64Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Four novel heteropolynuclear and polynuclear complexes of the general formulae [Au(S2CNR2)2]2X (X = [CdCl4]2-, R = CH3 (1); X = [Cd2Cl6]2-, R = C3H7 (2)) and [Au(S2CNR2)2][AuCl4] (R = iso-C3H7 (3); R = iso-C4H9 (4)) were prepared using heterogeneous reactions between appropriate freshly precipitated binuclear cadmium(II) dialkyl dithiocarbamates and AuCl3 in 2 M hydrochloric acid. The isolated complexes were studied by 13C CP/MAS NMR spectroscopy, single-crystal X-ray diffraction and simultaneous thermal analysis (STA) under an argon atmosphere. In all molecular structures (1–4), one of the gold atoms coordinates two dialkyl dithiocarbamate ligands in the S,S’-bidentate mode, forming a square-planar coordination polygon [AuS4], while the other gold atom (in 3 and 4) has four neighbouring chlorine atoms [AuCl4]. At the supramolecular level, compounds 1 and 2 comprise binuclear cations, [Au2{S2CN(CH3)2}4]2+ and polynuclear chains, ([Au{S2CN(C3H7)2}2]+)n in a combination with [CdCl4]2- and [Cd2Cl6]2- anions, respectively. Unexpected structural distinctions at the supramolecular level were discovered for the chemically related compounds 3 and 4. In these ionic complexes, there are either cationic trinuclear formations, {[Au{S2CN(iso-C3H7)2}2]2[AuCl4]}+, or polynuclear chains, ([Au{S2CN(iso-C4H9)2}2]+)n, both combined with [AuCl4]– anions, in the structural basis of compounds 3 and 4, respectively.

sted, utgiver, år, opplag, sider
2012. Vol. 40, nr 1, s. 53-64
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URN: urn:nbn:se:ltu:diva-7115DOI: 10.1016/j.poly.2012.03.043ISI: 000305590800007Scopus ID: 2-s2.0-84862673918Lokal ID: 56f288ea-59de-4c5e-8fca-285a96492d2aOAI: oai:DiVA.org:ltu-7115DiVA, id: diva2:980002
Merknad
Validerad; 2012; 20120410 (andbra)Tilgjengelig fra: 2016-09-29 Laget: 2016-09-29 Sist oppdatert: 2018-07-10bibliografisk kontrollert

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