Bromidobis[3-(1H-pyrazol-1-yl-κN(2))propionamide-κO]copper(II) bromide methanol monosolvate

• Published in: Acta crystallographica. Section E, Structure reports online Vol. 68; no. Pt 10; pp. m1253 - m1254
• Main Authors: Wagner, Thomas, Hrib, Cristian G, Lorenz, Volker, Edelmann, Frank T, Gilje, John W
• Format: Journal Article
• Language: English
• Published: United States International Union of Crystallography 01-10-2012
• Subjects: Metal-Organic Papers
• ISSN: 1600-5368; 1600-5368
• DOI: 10.1107/S1600536812038111

The title copper(II) N-pyrazolylpropanamide (PPA) complex, [CuBr(PPA)(2)]Br, was obtained in 78% yield by treatment of CuBr(2) with an excess of the ligand in methanol. Crystallization from the mother liquid afforded the title compound, i.e. the methanol solvate [CuBr(C(6)H(9)N(3)O)(2)]Br·CH(3)OH or [CuBr(PPA)(2)]Br·MeOH, as bright green crystals. In the solid state, the title salt comprises isolated [CuBr(PPA)(2)](+) cations, separated bromide ions and methanol of crystallization. In the cation, the central Cu(II) ion is coordinated by two N,O-chelating PPA ligands and one Br(-) ion. The coordination geometry around the Cu(II) ion is distorted trigonal-bipyramidal with the bromide ligand and the amide O atoms occupying the equatorial positions [Cu-Br = 2.4443 (4) Å; Cu-O = 2.035 (2) and 2.179 (2) Å], while the pyrazole N atoms coordinate in the axial positions [Cu-N = 1.975 (2) and 1.976 (2) Å]. In the crystal, the three constituents are linked by N-H⋯Br, O-H⋯Br, and N-H⋯O hydrogen bonds, forming a three-dimensional network.