Crystal structure of chlorido(2-{[2-(phenylcarbamothioyl)hydrazin-1-ylidene](pyridin-2-yl)methyl}pyridin-1-ium)gold(I) chloride sesquihydrate

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 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 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 molecules, one of which is located on a twofold rotation axis, and a non-coordinating chloride ion complete the structural assembly. The molecular structure is stabilized by intramolecular and intermolecular N—H...Cl, N—H...N, O—H...Cl and O—H...O hydrogen bonding.

Keywords

• crystal structure
• gold(I) complex
• thiosemicarbazone
• hydrogen bonding