The Crystal Structures of 2-(3’-Hydroxypropyl)benzimidazolium Hexa- and Tetrachloroplatinate

2-(3’-Hydroxypropyl)benzimidazolium (Hhpb) hexa- and tetrachloroplatinate (C O) ·[PtCl ] 1 and (C O) ·[PtCl ] 2 were synthesized and their crystal structures determined. Compound 1 is monoclinic, space group P2 /n, a = 8.800(1), b = 14.389(2), c = 10.264(2) Å, β = 98.540(10)°, V = 1285.3(3) Å , Z = 2 and Dc = 1.959 g cm . Compound 2 is triclinic, space group P1̄, a=7.8480(10), b=9.0460(10), c=9.6980(10) Å ,α =65.420(10), β =68.810(10), γ = 76.770(1)°,V =581.26(4) Å , Z =1 and Dc =1.969 g cm . In both compounds, the Pt atoms reside at a centre of inversion. Compounds 1 and 2 are comprised of 2-(3’-hydroxypropyl)benzimidazolium (Hhpb) : (C O) and [PtCl and [PtCl ions, respectively, linked by intermolecular hydrogen bonds N...Cl [range from 3.428(3) to 3.584(4) Å ], N···O [2.769(5) Å ] and O···Cl [3.338(4) and 3.321(3) Å ] for 1, and N···Cl [3.162(7) Å ], N···O [2.749(8) Å ] and O···Cl [3.289(6) Å ] for 2.