Dichloridobis(N,N′-diethylthiourea-κS)mercury(II)

Abstract

There are two mol­ecules in the asymmetric unit of the title compound, [HgCl2(C5H12N2S)2]. In both mol­ecules, the N,N′-diethyl­thio­urea ligands exhibit a cis,trans geometry around their C—N amide bonds. The shapes of the mol­ecules are, to a large extent, determined by intra­molecular N—H⋯Cl hydrogen bonds formed by the N—H groups from the cis amide groups. In one mol­ecule, these groups are involved in three-center hydrogen bonds involving both chloride ligands, whereas in the other mol­ecule only one Cl ligand takes part in intra­molecular hydrogen bonding. The coordination around the Hg atom is distorted tetra­hedral with an S2Cl2 donor set. Inter­molecular hydrogen bonds between N—H groups from the trans amide units of the thio­amide ligands and the chloride ligands connect the mol­ecules into a polymeric chain extending along the c axis. One of the ethyl groups of the N,N′-diethyl­thio­urea ligands is disordered over two positions in one of the mol­ecules, with an occupancy of 0.654 (17) for the major component.

Dicyanidobis(N,N′-dimethythiourea-κS)mercury(II)

“…1, Table 1). The bond distances and bond angles are in agreement with those reported for related compounds (Ahmad et al, 2009;Altaf et al, 2010;Jiang et al, 2001;Lobana et al, 2008;Mufakkar et al, 2010;Nawaz et al, 2010;Popovic et al, 2000;Wu et al, 2004). The SCN 2 moiety of dmtu is planar [to within 0.002 (1) In the crystal packing of the title complex, symmetry-related molecules are connected via intermolecular N-H···N hydrogen bonds, involving the thiourea NH atoms and the N atom of the CN -anions (Fig.…”

“…Several crystallographic reports about mercury(II) complexes of the type, L 2 HgX 2 (L = thiourea or its derivatives) reveal that these complexes usually consist of discrete monomeric molecules with tetrahedral (somewhat distorted) coordination environments around mercury(II) (Ahmad et al, 2009;Bell et al, 2001;Jiang et al, 2001;Lobana et al, 2008;Mufakkar et al, 2010;Nawaz et al, 2010;Popovic et al, 2000;Wu et al, 2004). Recently, we have reported the crystal structures of a number of cyanido complexes of d 10 metal ions with L-type ligands, including the crystal structure of a trinuclear complex, [{(tmtu) 2 Hg(CN) 2 } 2 .…”

Crystal structure of dichloridobis(N,N′-dimethylthiourea-κS)mercury(II)

“…At 102.47 (4) , the Cl-Hg-Cl bond angle is significantly smaller, which can be attributed to the bulkier Dmtu ligands. The Hg-S, Hg-Cl and other bond lengths (Table 1) have similar values compared with other [HgCl 2 L 2 ] complexes (Ahmad et al, 2009;Isab et al, 2011;Malik et al, 2010a;Mufakkar et al, 2010;Popović et al, 2000). In (I), the N-(C S)-N skeleton of the Dmtu ligand is essentially planar with an r.m.s.…”

“…In both types of complexes, monomeric (1:2) or polymeric (1:1), the coordination environment around Hg II is distorted tetrahedral or pseudo-tetrahedral. We have recently reported the crystal structures of HgCl 2 and Hg(CN) 2 complexes with methylthiourea as an auxiliary ligand (Isab et al, 2011), N,N 0 -dimethylthiourea (Malik et al, 2010a), N,N 0 -diethylthiourea (Mufakkar et al, 2010), N,N 0 -dibutylthiourea (Ahmad et al, 2009) and tetramethylthiourea (Nawaz et al, 2010).…”