SYNTHESIS AND CHARACTERIZATION OF DERIVATIVES OF COPPER(I) WITH N-DONOR LIGANDS .1. AZOLE AND BIS(AZOLYL)ALKANE COMPOUNDS - CRYSTAL-STRUCTURE OF NITRATO BIS(TRI-P-TOLYLPHOSPHINE)COPPER(I)

Several new complexes of the type [Cu(NO3)(PPh(3))(2)(L)(m)] (L = 3-me thylpyrazole, 4-methylpyrazole, 3,5-dimethylpyrazole, 4-bromopyrazole or bis(4-methylpyrazol-1-yl)methane, m = 1; L = pyrazole, 1,2,4-triazo le or 2-methylimidazole, m = 2), [Cu(NO3)(PPh(3))(L)] (L = 3,4,5-trime thylpyrazole or 4-phenylimidazole) [Cu(NO3) (PAr3)(n)(L)(3)] (Ar = p- or m-tolyl, n = 0 or 1, L = pyrazole), [CuX(PPh(3))(2)(L)] (X = Cl, Br or I, L = pyrazole or 3,5-dimethylpyrazole) and [CuX(PPh(3))(L)] (X = Cl or Br, L = bis (pyrazol-1-yl)methane, bis(3,5-dimethylpyrazol-1-yl ) methane or bis(triazol-1-yl)methane) have been prepared and characte rized by analytical and spectral data. The compounds [CuX(PPh(3))(2)(L )] (X = Cl, Br or I, L = pyrazole or 3,5-dimethylpyrazole) are fluxion al at temperature above 240 K. The dinuclear compound [Cu-2(PPh(3))(3) (pzH)(2)] was obtained when the reaction between [CuI(PPh(3))(3)] and pyrazole (pzH) was carried out in methanol containing alkali. In the c rystal structure of the title compound, the copper atom is found in a strongly distorted tetrahedral coordination [P-Cu-P: 128.0(1)degrees] with two long Cu-O distances [2.217(9) and 2.184(9) Angstrom].