1-Butyl-3-methyl-imidazolium tri-bromido-(tri-phenyl-phosphane-κ P )nickelate(II) butan-1-ol hemisolvate.

The solvated title salt, (C 8 H 15 N 2 )[NiBr 3 (P(C 6 H 5 ) 3 )]·0.5C 4 H 10 O, was obtained in the form of single crystals directly from the reaction mixture. The mol-ecular structure consists of separated 1-butyl-3-methyl-imidazolium cations, tri-bromido-(tri-phenyl-phosphane)nickelate(II) anions and half a solvent mol-ecule of 1-butanol, all connected via multiple hydrogen contacts to form a three-dimensional network. The co-crystallized 1-butanol mol-ecule is disordered and adopts two orientations. The central C-C bonds of both orientations are located on an inversion centre (Wyckoff site 2 b of space group P 2 1 / n ). Thereby, each orientation has again two orientations with the OH group being located either on one or the other side of the C 4 alkyl chain. The dried solvent-free compound exhibits a relatively low melting point (m.p. = 412 K).