Poly[bis(μ-4-benzoyl-1-isonicotinoylthiosemicarbazide-κ²N:S)dichloridocadmium(II)]

Abstract

The asymmetric unit of the title complex, [CdCl(2)(C(14)H(12)N(4)O(2)S)(2)](n), consists of one Cd(II) ion located on the crystallographic inversion centre, one 4-benzoyl-1-isonicotinoylthiosemicarbazide ligand and one chloride ligand. The central Cd(II) ion adopts a distorted octahedral coordination geometry formed by two pyridyl N atoms of two ligands, two S atoms of two other ligands and two chloride ligands. The thiosemicarbazide ligands act as bridges, linking the metal ions into a two-dimensional layered structure parallel to the bc plane. Intermolecular N-H...O hydrogen bonds and C-H...pi interactions exist between adjacent layers.

Poly[[(μ2-4,4′-bipyridyl-κ2N:N′)bis{μ2-N-[2-(2-hydroxybenzoyl)carbamothioyl]acetamidato-κ4O,N,O′:S}bis(nitrato-κ2O,O′)dicadmium] dimethylformamide tetrasolvate]

“…The axial positions are occupied by one N atom from 4,4′-bipyridine and one S atom from a neighbouring thiosemicarbazide ligand. The Cd1-N4 bond distance is 2.360 (5) Å, indicating the strong coordination between Cd and 4,4′-bipyridine, while the Cd1-S1 i [symmetry code: (i) -x+2, -y, -z+1] bond length is 2.628 (5) Å, which is slightly shorter than that previously reported (2.7364 (8) Å) for a Cd complex with thiosemicarbazones (Wang et al, 2010) (Table 1) play an important role in stabilizing the packing (Fig. 3).…”

“…For background to the properties and applications of thiosemicarbazone complexes, see: Quiroga & Ranninger (2004); Kasuga et al (2003); Floquet et al (2009); Hassanien et al (2008); Latheef et al (2006); Babb et al (2003). For related structures, see: Ke et al (2007); Wang et al (2010); Liu et al (2013). For the synthesis of the N-(2-(2-hydroxybenzoyl)carbamothioyl)acetamide ligand, see: Wang et al (2000).…”

Di-μ2-chlorido-dichloridobis(dimethylformamide)tetrakis[μ3-1-(2-oxidobenzoyl)-2-(2-oxo-2-phenylethanethioyl)hydrazine-1,2-diido]octacopper(II) dimethylformamide disolvate

“…Acylthiosemicarbazide ligands contain O, S and N as potential donor atoms, and can support mono-and multinuclear structural complexes. Two complexes have so far been reported by our group based on 1,4-diacylthiosemicarbazone ligands, and they are an extended structure (Wang et al, 2010) and a mononuclear complex (Ke et al, 2007).…”

“…In a previously reported cobalt complex (Ke et al, 2007), the tridentate thiosemicarbazone ligands coordinate to the Co II cation through one N atom and two carbonyl O atoms in a chelating mode, and the complex has a mononuclear structure. In a previously reported cadmium complex (Wang et al, 2010), the ligands coordinate to the Cd II cations via N and S atoms in a bridging motif, and the structure is characterized by a two-dimensional architecture. In the present copper octanuclear complex, (I), each ligand chelates two Cu II cations and then, through the O atom of the phenolate group, bridges a third Cu II cation, which unites the two dinuclear components and forms the saddle-shaped tetranuclear structure.…”