A NEW CLASS OF BIOMIMETICALLY RELEVANT SCORPIONATE LIGANDS - III - THE BIS(PYRAZOLYL)METHANE(PHEN-2'-OL)S - SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF MONO AND DINUCLEAR COPPER(II) COMPLEXES

From the tridentate, mixed functionality ligands, bis(pyrazol-l-yl)met hane(phen-2'-ol) (LlOH), bis(3,5-dimethylpyrazol-l-yl)methane (phen-2' -ol) (L2OH), and bis(3-isopropylpyrazol-l-yl)methane(phen-2'-ol) (L3OH ), the following Cu(II) complexes have been synthesized, [Cu(L1OH)(2)( solvent)][BF4](2) . H2O (1 . H2O), [Cu(L2OH)(L2O)] [BF4]. H2O (2 . H2O ), [Cu(L2O)(2)]. MeCN . H2O (3 . MeCN . H2O), and [Cu-2(mu-L30)(L3OH)( mu-OH)(H2O)][BF4](2) . 0.5CH(2)Cl(2) (4.0.5CH(2)Cl(2)). 1, 2 and 4 hav e been characterized by X-ray crystallography, giving the following st ructural parameters: 1(MeCN). MeCN, C30H28N10B2Cu1F8O2, monoclinic, a = 16.581(3); b = 12.041 (2); c = 18.111 (3) Angstrom; beta = 103.102(8 )degrees, V = 3521.0(10) Angstrom(3), space group P2(1),/c, Z = 4.2 . H2O, C34H39N8B1Cu1F4O3, monoclinic, a = 9.513(2); b = 26.808(3); c = 1 4.148(5) Angstrom; beta = 90.39(2)degrees, V = 3608.1(12) Angstrom(3), space group P2(1)/c, Z = 4. 4.2(CH3)(2)CO, C45H49N8B2Cu2F8O5, monocli nic, a = 10.934(3); b = 21.701(5); c = 22.646(6) Angstrom; beta = 96.7 7(3)degrees, V = 5336.0(20) Angstrom(3), space group P2(1)/c, Z = 4. ( C) 1998 Elsevier Science S.A. All rights reserved.