Bromidobis[3-(1H-pyrazol-1-yl-?N(2))propionamide-?O]copper(II) bromide methanol monosolvate.

ABSTRACT: 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.

SUBMITTER: Wagner T 

PROVIDER: S-EPMC3470141 | biostudies-literature | 2012 Oct

REPOSITORIES: biostudies-literature