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Diiodo-3, 4, 5, 6-tetrahydropyrimidinium-2-thiolato-S-mercury(II)

The reaction of 3, 4, 5, 6-tetrahydropyrimidine-2-thione (H_4pymtH) with mercury(II) iodide in methanol in a 1:1 molar ratio resulted in the formation of single crystals of the title compound, [Hg(C_4H_8N_2S)I_2 ]. The Hg atom is coordinated by one S atom from H_4pymtH at 2.456 (2) A and by two I atoms at distances of 2.6872 (7) and 2.7044 (6) A , and has a characteristic deformed trigonal coordination geometry. The molecule has crystallographic m symmetry but the Hg atom is disordered above and below the mirror plane.

mercury(II) iodide; 3; 4; 5; 6-terahydropyrimidine-2-thione; crystal structure

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