Abstract
The crystal structure of the title tin complex, [Sn(C6H5)3Cl(C2H6OS)], (I), has been reported with one mol-ecule in the asymmetric unit in an ortho-rhom-bic cell [Kumar et al. (2009 ▸). Acta Cryst. E65, m1602-m1603]. While using SnPh3Cl as a starting material for a reaction for which the products were recrystallized over a very long time (six months) from dimethyl sulfoxide (DMSO), a new polymorph was obtained for (I), with two independent mol-ecules in the asymmetric unit of a monoclinic cell. The coordination geometry of the Sn centres remains unchanged, with the Cl- ion and the DMSO mol-ecule in the apical positions and the phenyl C atoms in the equatorial positions of a trigonal bipyramid. The main difference between the polymorphs is the relative orientation of the phenyl rings in the equatorial plane, reflecting a degree of free rotation of these groups about their Sn-C bonds. In the crystal, mol-ecules are linked into [010] chains mediated by weak C-H⋯O inter-actions.
Highlights
The crystal structure of the title tin complex, [Sn(C6H5)3Cl(C2H6OS)], (I), has been reported with one molecule in the asymmetric unit in an orthorhombic cell [Kumar et al (2009)
The main difference between the polymorphs is the relative orientation of the phenyl rings in the equatorial plane, reflecting a degree of free rotation of these groups about their Sn—C bonds
Molecules are linked into [010] chains mediated by weak C—HÁ Á ÁO interactions
Summary
The Dakar research group and others worldwide have been focusing for a long time on the study of interactions of ammonium salts of oxyacids with metallic halides, to obtain adducts and complexes in which the oxyanion behaves as a ligand through its O atoms (Diasse -Sarr & Diop, 2011; Pouye et al, 2014; Toure et al, 2016; Sarr et al, 2016; Ng & Hook, 1999). The reported title compound, (I), a new monoclinic polymorph of a frequently used starting material in tin chemistry, was obtained in this way: in one of our research programs, we have initiated the study of the interactions between [CH3NH2(CH2)2NH2CH3]SO4 and SnPh3Cl in a mixture of CH2Cl2 and dimethyl sulfoxide (DMSO) as solvent. Note: (a) Kumar et al, 2009 With such contrasting features for the dimorphic phases of [SnPh3Cl(DMSO)], obtained basically from DMSO solutions using short and long evaporation times, one could expect the apparition of other phases under different conditions of crystallization, for example by varying the solvent or the temperature of crystallization
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