Abstract

The crystal structure of catena-bis(2-thiobarbiturato-O,S)diaquacadmium (C8H10CdN4O6S2) n (I), [Cd(H2O)2(HTBA)2] n (C4H4N2O2S is 2-thiobarbituric acid, H2TBA) has been determined. The crystals of compound I are triclinic, a = 6.9433(3) A, b = 7.2257(3) A, c = 7.4047(3) A, α = 88.559(2)°, β = 75.346(2)°, γ = 111.687(1)°, V = 331.05(3) A3, space group \(P\bar 1\), Z = 1. The Cd2+ ion is coordinated to the two oxygen atoms of water molecules and the two oxygen and two sulfur atoms of four HTBA− ions at the vertices of an octahedron. Octahedra are linked by bridging μ2-HTBA−-O,S ions into infinite chains. Intermolecular hydrogen bonds form infinite chains. The structure is also stabilized by the π-π interaction of HTBA− ions.

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