Research Article: Bis{4-phenyl-1-[1-(pyridin-2-yl-κN)ethyl­idene]thio­semicarbazidato-κ2N1,S}cadmium

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Alexandra de Souza Fonseca, Vanessa Carratu Gervini, Leandro Bresolin, Aline Locatelli, Adriano Bof de Oliveira.


The reaction of cadmium acetate dihydrate with 2-acetyl­pyridine (4-phenyl­thio­semicarbazone) yielded the title compound, [Cd(C14H13N4S)2]. The CdII atom is six-coordin­ated in a distorted octa­hedral environment by two deproton­ated thio­semicarbazone ligands acting in a tridentate chelating mode through two N and one S atoms, forming metalla-rings. In the crystal, mol­ecules are connected through inversion centers via pairs of N—H⋯S inter­actions, building a one-dimensional hydrogen-bonded polymer along [0-1-1].

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For the synthesis of 2-acetyl­pyridine-(4-phenyl­thio­semi­carbazone), see: Offiong & Martelli (1997 ▶). For thio­semi­carbazone complexes with similar coordination environments, see: Ali et al. (2002 ▶); Kovala-Demertzi et al. (2005 ▶). For the anti­bacterial and anti­fungal activity of CdII thio­semicarbazone complexes, see: Alomar et al. (2010 ▶). For the bioinorganic chemistry of the CdII ion and its relation to biologically important ions, namely ZnII and CaII, see: Kaim & Schwederski (1995 ▶).