Portal de Periódicos da CAPES

Three-coordinated complexes of copper(I)

1969; Elsevier BV; Volume: 5; Issue: 12 Linguagem: Inglês

10.1016/0020-1650(69)80105-4

1878-3473

Walter T. Reichle,

Crystal structures of chemical compounds

Several new complexes of the type [Cu(NO3)(PPh3)2(L)m] (L = 3-methylpyrazole, 4-methylpyrazole, 3,5-dimethylpyrazole, 4-bromopyrazole or bis(4-methylpyrazol-1-yl)methane, m = 1; L = pyrazole, 1,2,4-triazole or 2-methylimidazole, m = 2), [Cu(NO3)(PPh3)] (L = 3,4,5-trimethylpyrazole or 4-phenylimidazole), [Cu(NO3) (PAr3)n(L)3] (Ar = p- or m-tolyl, n = 0 or 1, L = pyrazole), [CuX(PPh3)2(L)] (X = Cl, Br or I, L = pyrazole or 3,5-dimethylpyrazole) and [CuX(PPh3)(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 characterized by analytical and spectral data. The compounds [CuX(PPh3)2(L)] (X = Cl, Br or I, L = pyrazole or 3,5-dimethylpyrazole) are fluxional at temperature above 240 K. The dinuclear compound [Cu2(PPh3)3(pzH)2] was obtained when the reaction between [CuI(PPh3)3] and pyrazole (pzH) was carried out in methanol containing alkali. In the crystal structure of the title compound, the copper atom is found in a strongly distorted tetrahedral coordination [PCuP: 128.0(1)°] with two long CuO distances [2.217(9) and 2.184(9) Å].