A new monoclinic polymorph of dichlorido-tetra-kis(dimethyl sulfoxide)-ruthenium(II)

Abstract

The title compound, cis,fac-dichloridotetra-kis(dimethyl sulfoxide)-κ(3)S,κO-ruthenium(II), [RuCl(2)(C(2)H(6)OS)(4)], was obtained from newly synthesized ruthenium complexes of 3-amino-2-chloro-pyridine. The Ru atom has a distorted octa-hedral coordination with two cis-oriented chloride ligands and four dimethyl sulfoxide ligands. Three of the sulfoxide ligands are S-bonded in a fac configuration, while the fourth is O-bonded. The title compound represents a new, and fourth, polymorph of the complex. Two other monoclinic forms and an ortho-rhom-bic modification have been reported previously.

Fig. 1.

View of the structure and the atom-numbering scheme of (I) showing 50% probability displacement ellipsoids. H atoms are shown as small spheres of arbitrary radii.

Fig. 2.

A view of the molecular packing in (I). Short contacts are represented by dotted lines. All H atoms except those involved in the short contacts have been omitted. [Symmetry codes: (i) -x, y - 1/2,1/2 - z; (ii) -x1, -y, 1 - z].

Fig. 3.

The preparation of the title compound.