作者:C. Marcos、J. M. Alía、V. Adovasio、M. Prieto、S. García-Granda
DOI:10.1107/s0108270198004314
日期:1998.9.15
The crystals of dichlorobis(thiourea-S)cadmium, [CdCl2SC(NH2)(2)}(2)], (I), and dibromobis(thiourea-S)cadmium, [CdBr2SC(NH2)(2)}(2)], (II), are orthorhombic (Pmn2(1) and Pnam, respectively), while those of diiodobis(thiourea-S)cadmium, [CdI2SC(NH2)(2)}(2)], (III), are monoclinic (P2(1)/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 all three cases. The average Cd-X distance increases from 2.541 (1) Angstrom in (I) to 2.655(3)Angstrom in (II) and 2.782(1) Angstrom in (III), whereas the average Cd-S distances in the three compounds are quite similar, their values being 2.517(1), 2.522(2) and 2.526 (2) Angstrom, for (I), (II) and (III), respectively.