(Acetato-κO)(acetato-κO,O′)bis(1,3-diazinane-2-thione-κS)cadmium(II)

Mahmood, Rashid; Hussain, S. G.; Fettouhi, Mohammed; Isab, Anvarhusein A.; Ahmad, Saeed

doi:10.1107/s1600536812041852

Cited by 7 publications

(7 citation statements)

References 13 publications

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“…All other H atoms were placed at calculated positions and allowed to ride with a C-H distance of 0.97 Å and U iso (H) = 1.2U eq (C). The C7 (C7A) and C8 (C8A) atoms in one ligand molecule and C14 (C14A), C15 (C15A), and C16 (C16A) in the second ligand molecule were constrained to double site partial occupancies which were refined to 0.58 (2) and 0.55(2) respectively for the two ligands. The thermal displacement parameters of atoms involved in disorder are: C6, C7, C7A, C8, C8A, N4, N7, C14, C14A, C15, C15A, C16, C16A, and N8 were restrained with DELU and SIMU commands [35].…”

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

et al. 2015

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A cadmium(II) complex tetrakis(1,3-diazinane-2-thione)cadmium(II) sulfate [Cd(Diaz) 4 ]SO 4 (1) is prepared and its crystal structure is determined by X-ray crystallography. The crystal structure of 1 consists of [Cd(Diaz) 4 ] 2+ and 2 4 SO − ions. In the complex ion, the central cadmium atom is coordinated by four Diaz molecules through sulfur atoms adopting a distorted tetrahedral geometry. The molecular structure is stabilized by N-H…O and N-H…S hydrogen bonding interactions. The complex is also characterized by IR and NMR spectroscopy and the spectroscopic data are discussed in terms of the nature of bonding.In recent years, considerable research efforts have been devoted to the structural characterization of cadmium(II) complexes of thioamides [1-22] because of their applications in biological systems [23,24], in analytical chemistry [25,26], in environmental toxicology [27], and as precursors for the preparation of CdS nanoparticles [28][29][30]. 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]. Recently, we have reported the crystal structures of two new complexes [Cd(Detu) 4 (SO 4 )] (Detu = N,N′diethylthiourea) [1] and [Cd(Diaz) 2 (CH 3 COO) 2 ] (Diaz = 1,3-diazinane-2-thione) [2] in which cadmium(II) shows severe distortions from the octahedral geometry. In view of our continued interest in the structural chemistry of cadmium(II) complexes with thiones [1-10], we report here the synthesis and crystal structure of a cadmium(II) complex of the heterocyclic ligand 1,3-diazinane-2-thione (3,4,5,6-tetrahydropyrimidine) [Cd(Diaz) 4 ]SO 4 . Experimental. Materials. Cadmium sulfate (CdSO 4 ⋅8/3H 2 O) was obtained from Merck Chemical Company, Germany. Diazinane-2-thione (Diaz) was prepared according to the procedure published in the literature [31].Synthesis of [Cd(Diaz) 4 ]SO 4 (1). The title complex was prepared by adding 0.24 g (2.0 mmol) of Diaz in 15 ml of methanol to an aqueous solution (5 ml) of cadmium sulfate (1.0 mmol, 0.26 g) and stirring the mixture for 30 min. The very light yellow cloudy solution was filtered and the filtrate was kept at room temperature for crystallization. As a result, the offwhite crystalline product was obtained, which was washed with methanol and dried.

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

et al. 2015

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“…The 1:1 complexes, for example [Cd(Melmt)-(S e CN)] (Melmt = N-methylimidazolidine-2-thione; Fettouhi et al, 2008) usually exist in the polymeric form. The 1:2 complexes such as [Cd(Dmtu) 2 X 2 ] (Dmtu = N,N 0 -dimethylthiourea-S; X = Cl, Br, I; Ahmad et al, 2011) are the most common and often consist of discrete monomeric molecules with a terahedrally (Moloto et al, 2003) or octahedrally (Mahmood et al, 2012) coordinated Cd II ion. The 1:3 compounds are rare: the structure of [Cd(Tu) 3 (SO 4 )] shows that the complex is a dimer, and the coordination around the metal atom is intermediate between square pyramidal and trigonal bipyramidal (Corao & Baggio, 1969).…”

Section: Structure Descriptionmentioning

confidence: 99%

catena-Poly[[chloridotris(1,3-thiazolidine-2-thione-κS)cadmium(II)]-μ-chlorido]

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Kama

et al. 2020

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The synthesis and characterization of poly[dichloridotri(1,3-thiazolidine-2-thione)cadmium(II)], [CdCl2(C3H5NS2)3] n , prepared from CdCl2·H2O and C3H5NS2 (tzdSH) in a 1:3 ratio, are described. The CdII cation is coordinated by three 1,3-thiazolidine-2-thione molecules and three Cl− anions in a distorted octahedral environment. The Cd metal centres are connected via Cl− ligands, creating polymeric chains running along the a-axis direction. The conformation of the chains is stabilized by N—H...Cl hydrogen bonds.

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“…Therefore, complexes of cadmium with thiones are important as structural models to understand metal-sulfur interactions in biological systems (Akrivos, 2001;Bell et al, 2004). In view of this, the crystal structures of several cadmium complexes of thiones, such as imidazolidine-2-thione (Imt) and 1,3-diazinane-2-thione (Diaz), have been reported (Ahmad et al, 2012;Al-Arfaj et al, 1998;Bell et al, 2004;Lobana et al, 2008;Malik et al, 2010;Mahmood et al, 2012Mahmood et al, , 2015Wazeer et al, 2007). The complexity of structures of the L 2 CdX 2 type (where L is a thione and X is a halide or pseudohalide) ranges from mononuclear tetrahedral complexes to polymeric octahedral species.…”

Section: Chemical Contextmentioning

confidence: 99%