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

The title complex, [AuCl(C(18)H(16)N(5)S)]Cl·1.5H(2)O, 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.