Ivanov, A. V., Lutsenko, I. A., Korneeva, E. V., Gerasimenko, A. V., Ogil’ko, G. V., Antzutkin, Oleg N. and Larsson, A. -C.. (2012) Binding of Au3+ from solutions by nickel(II) and cadmium diisopropyl dithiophosphates: MAS 31P NMR, structure and thermal behavior of the polynuclear complex [Au2{S2P(O-iso-C3H7)2}2] n. Russian Journal of Coordination Chemistry, Vol. 38 (No. 6). pp. 430-439. ISSN 1070-3284

Full text not available from this repository.

Abstract

The paper deals with reactions of freshly precipitated diisopropyl dithiophosphate (Dtph) complexes of nickel(II), [Ni{S2P(O-iso-C3H7)2}2] and cadmium, [Cd2{S2P(O-iso-C3H7)2}4], with the [AuCl4]− in 2M HCl, resulting in gold transition from the solution to the precipitate as polymeric gold(I) diisopropyl dithiophosphate. The reduction of gold(III) to gold(I) noted in both cases is due to oxidation of the relevant part of the Dtph group to bis(O,O′-di-(iso)-propoxythiophosphoryl) disulfide, (iso-C3H7O)2P(S)S-S(S)P(O-iso-C3H7)2. The polynuclear gold(I) complex [Au2{S2P(O-iso-C3H7)2}2] n (I) was isolated on a preparative scale from the chemisorption system and studied by MAS 31P NMR and X-ray diffraction. The key structural unit of I is the non-centrosymmetric binuclear molecule [Au2{S2P(O-iso-C3H7)2}2] in which the gold atoms are connected by two bridging Dtph groups. The structure contains two types of non-equivalent binuclear molecules related as conformational isomers. Owing to the relatively weak Au-Au contacts, the neighboring binuclear [Au2{S2P(O-iso-C3H7)2}2] molecules are involved in an infinite polymeric chain with conformer alternation along the chain. To elucidate the conditions for the recovery of bound gold(I), the precipitates formed in the sorption systems were studied by simultaneous thermal analysis under argon. As the final product, thermolysis gives reduced metallic gold. The ability of dithiophosphate complexes to bind gold from a solution is much lower than that of dithiocarbamate complexes, which is due to oxidation of some Dtph groups to disulfide.

Item Type:	Journal Article
Divisions:	Faculty of Science > Physics
Journal or Publication Title:	Russian Journal of Coordination Chemistry
Publisher:	Springer
ISSN:	1070-3284
Date:	2012
Volume:	Vol. 38
Number:	No. 6
Page Range:	pp. 430-439
Identification Number:	10.1134/S107032841205003X
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
URI:	http://wrap.warwick.ac.uk/id/eprint/47951

Data sourced from Thomson Reuters' Web of Knowledge

Request changes to a record

Actions (login required)

View Item