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

Abstract

Two cadmium(II) iodide complexes, [Cd(Detu) 2 I 2 ] (1) and [Cd(Diaz) 2 I 2 ] (2) (Detu = N,N 0 -diethylthiourea; Diaz = 1,3-diazinane-2-thione) have been prepared and their structures been determined by X-ray crystallography. The crystal structures show that both complexes are mononuclear with the cadmium atom coordinated to two iodide ions and two thione ligands adopting a distorted tetrahedral geometry. Whereas, 2 exists as discrete monomeric species, the structure of 1 consists of three crystallographically independent molecules. The complexes were also characterized by IR and NMR ( 1 H and 13 C) spectroscopy.

Structural characterization of tetrakis(1,3-diazinane-2-thione)cadmium(II) sulfate

“…In 13 C NMR, the >C=S, C-N and C-C resonances of Diaz in the complex are observed at 173.25 ppm, 40.20 ppm, and 19.11 ppm respectively (175.62 ppm, 39.76 ppm, 19.19 ppm for free Diaz). The upfield shift of 2.4 ppm in the >C=S resonance is in accordance with the data observed for other cadmium(II) complexes[1,3,4,10].…”

“…These structural reports describe that in most of the cases, cadmium(II) complexes exist as neutral monomeric [3][4][5][6][7][8][9][10][11][12][13][14][15][16] or polymeric [17][18][19] molecules of the general formula [CdL 2 X 2 ] with the cadmium atom possessing a tetrahedral or distorted octahedral coordination environment respectively. In some cases, ionic complexes of the type [CdL 4 ]X 2 (X = nitrate or sulfonate) are also formed [21, 22].…”

Tetrakis(1-3-diazinane-2-thione)platinum(II) chloride monohydrate complex: Synthesis, spectroscopic characterization, crystal structure and in vitro cytotoxic activity against A549, MCF7, HCT15 and HeLa human cancer lines

“…The selected mid-IR frequencies are given in Table 6. The presence of ν(C_S), ν(N\H) and ν(C\N) absorption bands validates the coordination of ligand to Pt(II) ion in the solid state [48][49][50][51].…”

“…The dose dependent in vitro cytotoxic effect was obtained by the stipulated increase in concentrations of complex 1 and cisplatin against the fixed number of human cancer cells. The IC 50 Table 7).…”

Synthesis and Characterization of Coordination Compounds of Silver(I) Nitrite with Ligands Ethylenethiourea and N,N'-diethylthiourea

“…Closed shell metal ion can be conducted with thiourea (tu) and it's derivatives ligands [1][2][3][4][5][6]. Ligands coordinate through sulfur, nitrogen, or both of these atoms.…”