journal menu
metal-organic compounds
The crystals of dichlorobis(thiourea-S)cadmium, [CdCl2{SC(NH2)2}2] (I), and dibromobis(thiourea-S)cadmium, [CdBr2{SC(NH2)2}2], (II), are orthorhombic (Pmn21 and Pnam, respectively), while those of diiodobis(thiourea-S)cadmium, [CdI2{SC(NH2)2}2], (III), are monoclinic (P21/c). In all these compounds, two S atoms from two thiourea molecules and two X (X = halogen) atoms coordinate to Cd in tetrahedral arrangements. Crystal packing is mainly determined by N—H
X hydrogen bonds, but is different in the three cases. The average Cd—X distances increase from 2.541 (1) in (I) to 2.655 (3) in (II) and 2.782 (1) Å in (III), whereas the Cd—S distances in the three compounds are quite similar, their values being 2.517 (1), 2.522 (2) and 2.526 (2) Å (average) for (I), (II) and (III), respectively.
X hydrogen bonds, but is different in the three cases. The average Cd—X distances increase from 2.541 (1) in (I) to 2.655 (3) in (II) and 2.782 (1) Å in (III), whereas the Cd—S distances in the three compounds are quite similar, their values being 2.517 (1), 2.522 (2) and 2.526 (2) Å (average) for (I), (II) and (III), respectively.
