Abstract
The title complex, [AuCl(C18H16N5S)]Cl·1.5H2O, may be considered as a gold(I) compound with the corresponding metal site coordinated by a thio-semicarbazone ligand through the S atom. The ligand adopts an E conformation and the gold(I) atom displays the expected linear geometry with a Cl atom also bonded to the metal ion [Cl-Au-S = 174.23 (5)°]. One of the pyridyl rings is protonated, giving the gold complex an overall positive charge. Two solvent water mol-ecules, one of which is located on a twofold rotation axis, and a non-coordinating chloride ion complete the structural assembly. The mol-ecular structure is stabilized by intra-molecular and inter-molecular N-H⋯Cl, N-H⋯N, O-H⋯Cl and O-H⋯O hydrogen bonding.
Highlights
Laboratory of Inorganic Synthesis and Crystallography, University of Brasılia, IQ, Campus Universitário Darcy Ribeiro, Edited by M
Compound with the corresponding metal site coordinated by a thiosemicarbazone ligand through the S atom
The ligand adopts an E conformation and the gold(I) atom displays the expected linear geometry with a Cl atom bonded to the metal ion [Cl—Au—S = 174.23 (5) ]
Summary
Thiosemicarbazones are generated from reactions of thiosemicarbazides with either an aldehyde or a ketone. They are compounds that can coordinate to transition metals and exhibit keto–enol tautomerism (Duan et al, 1996). Thiosemicarbazones are known to have diverse biological activity, including anti-malarial properties and antibacterial, antitubercular, antiviral and antitumor activity 2004, Casini et al, 2008, Khanye et al, 2010). The study of gold compounds with thiosemicarbazones has great importance: the literature reports that some compounds of this type have been shown to exhibit biological activity and have potential applications (Casini et al, 2008, Lessa et al., 2011). Symmetry codes: (i) x þ 12; y þ 32; z; (ii) x; y þ 1; z 12
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