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Acta Cryst. (2013). E69, m633-m634
[ doi:10.1107/S1600536813029693 ]

(2-{[4-(Chlorido­mercur­yl)phen­yl]imino­meth­yl}pyridine-[kappa]2N,N')di­iodido­mercury(II) dimethyl sulfoxide monosolvate

T. S. Basu Baul, I. Longkumer, S. W. Ng and E. R. T. Tiekink

Abstract: The title dimethyl sulfoxide solvate, [Hg2(C12H9ClN2)I2]·C2H6OS, features tetra­hedrally and linearly coordinated HgII atoms. The distorted tetrahedral coordination sphere is defined by chelating N atoms that define an acute angle [69.6 (3)°] and two I atoms that form a wide angle [142.80 (4)°]. The linearly coordinated HgII atom [177.0 (4)°] exists with a donor set defined by C and Cl atoms. Secondary inter­actions are apparent in the crystal packing with the tetra­hedrally and linearly coordinated HgII atoms expanding their coordination environments by forming weak Hg...I [3.772 (7) Å] and Hg...O [2.921 (12) Å] inter­actions, respectively. Mercury-containing mol­ecules stack along the a axis, are connected by [pi]-[pi] inter­actions [inter-centroid distance between pyridine and benzene rings = 3.772 (7) Å] and define channels in which the dimethyl sulfoxide mol­ecules reside. The latter are connected by the aforementioned Hg...O inter­actions as well as C-H...I and C-H...O inter­actions, resulting in a three-dimensional architecture.

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