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

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.

(±)-Ethyl 6,7-dimeth-oxy-1-(1H-pyrrol-2-yl)-1,2,3,4-tetra-hydroisoquinoline-2-car-boxyl-ate.

In the title compound, C(18)H(22)N(2)O(4), the dihedral angle between the pyrrolyl and quinolinyl fragments is 68.97 (2)°. Two non-classical intra-molecular C-H⋯O hydrogen bonds stabilize the mol-ecular geometry.