Crystal structure of μ-oxalato-κ2 O 1:O 2-bis­[(dimethyl sulfoxide-κO)tri­phenyl­tin(IV)]

• Published in: Acta crystallographica. Section E, Crystallographic communications Crystallographic communications, 2017-06, Vol.73 (Pt 7), p.1033-1036
• Main Authors: Pouye, Serigne Fallou, Cisse, Ibrahima, Diop, Libasse, Dolmella, Alessandro, Bernès, Sylvain
• Format: Article
• Language: English
• Subjects: Research Communications
• ISSN: 2056-9890
• DOI: 10.1107/S2056989017008519

The structure of the studied adduct consists of two dimethyl sulfoxide mol­ecules coordinating the [C 2 O 4 (SnPh 3 ) 2 ] core via their oxygen atoms. The Sn atoms display a trans trigonal–bipyramidal [SnC 3 O 2 ] arrangement, and the oxalate dianion behaves as a bidentate bridging ligand. In the previously reported [C 2 O 4 (SnPh 3 ) 2 ] complex [Diop et al. (2003 ▸ ). Appl. Organomet. Chem. 17 , 881–882.], the Sn IV atoms are able to formally complete their coordination by addition of dimethyl sulfoxide (DMSO) mol­ecules provided by the reaction medium, affording the title complex, [Sn 2 (C 6 H 5 ) 6 (C 2 O 4 )(C 2 H 6 OS) 2 ]. The Sn IV atoms are then penta­coordinated, with a common trans trigonal–bipyramidal arrangement. The asymmetric unit contains one half-mol­ecule, which is completed by inversion symmetry in space group type C 2/ c . The inversion centre is placed at the mid-point of the central bis-monodentate oxalate dianion, C 2 O 4 2− , which bridges the [(SnPh 3 )(DMSO)] moieties. The mol­ecule crystallizes as a disordered system, with two phenyl rings disordered by rotation about their Sn—C bonds, while the DMSO mol­ecule is split over two positions due to a tetra­hedral inversion at the S atom. All disordered parts were refined with occupancies fixed of 0.5.