Complexes of heterocyclic thiones and Group 12 metals

Synthesis and Crystal Structures of Cadmium Iodide Complexes of N,N′-Diethylthiourea and 1,3-Diazinane-2-thione

“…In both complexes, the Cd-S and Cd-I bond lengths (Table 3) are in agreement with those reported for related compounds [10][11][12][13][14][15][16][17][18][19][20][21][22][23]. The SCN 2 moieties are essentially planar with bond lengths corresponding to values intermediate between single and double bonds.…”

“…In view of this, cadmium(II) complexes of thiones have been widely studied in recent years [8][9][10][11][12][13][14][15][16]. The structural studies on cadmium(II) halide complexes of thiones describe that in most of the cases the structures consist of discrete mononmeric molecules with cadmium adopting a somewhat distorted tetrahedral coordination geometry [11][12][13][14][15][16][17][18][19][20][21][22][23]. In some cases, polymeric structures are obtained through sulfur and halide bridging consisting of [CdS 3 X 3 ] distorted octahedra [18,19].…”

“…The structural studies on cadmium(II) halide complexes of thiones describe that in most of the cases the structures consist of discrete mononmeric molecules with cadmium adopting a somewhat distorted tetrahedral coordination geometry [11][12][13][14][15][16][17][18][19][20][21][22][23]. In some cases, polymeric structures are obtained through sulfur and halide bridging consisting of [CdS 3 X 3 ] distorted octahedra [18,19]. Whereas the complexes of cadmium halides are usually neutral, with cadmium(II) nitrate or sulfonate, ionic complexes of the type [CdL 4 ]X 2 are also known [24,25].…”

Complexation of Cd(SeCN)2with imidazolidine-2-thione and its derivatives: Solid state, solution NMR and anti-bacterial studies

“…Both N-and/or S-coordination is possible with these ambidentate ligands, as well as thione-thiol tautomers. However, although N-coordination was suggested earlier for some of the complexes from infrared spectroscopic studies, it has been confirmed crystallographically that coordination is via the exocyclic sulfur, predominantly in the thione form, with a reduction in the π-electron density of the exocyclic C=S bond [14,[16][17][18][19][20].…”

Synthesis and Crystal Structure of a New Cadmium(II) Complex with 1,3-Thiazolidine-2-thione and Bipyridine Ligands

“…2 The crystal structure on the metal complexes of this ligand is scarce.This ligand exhibits a thiol-thione tautomerism, as shown in the following thiol-thione equilibrium (N=C-SH and -NH-C=S) [Scheme 1].3 Deprotonation in a basic media produces the thionate moiety, which is capable of a monodentate, bidentate or bridging coordination behavior utilizing either sulfur or nitrogen atoms, or both of them, in the complexes. 4 Zinc and cadmium complexes with N2S2 ligand cores are of interest as structural and spectroscopic models for metal binding sites in a number of metallothioneins and metalloregulatory proteins.…”