New pyrazole-derived ligands, 3,5-bis(2-pyridyl)pyrazole (HL), 2-(6-methyl) pyridyl-2-pyridyl-3,5-pyrazole (HL1) and 3,5-bis-2-(6-methyl)pyridyl-3,5-pyrazole (HL2), are reported. Complexes of formulae [ML(NO3)]·xH2O (M = CoII, NiII, ZnII and CdII), [ML(NCS)]·H2O (M = CoII, NiII, ZnII and CdII), [ML1(NO3)]·H2O (M = NiII and CoII), [M2L2(NO3)2(OH)]·H2O (M = NiII and CoII), [M2L1Cl2(OH)] (M = CoII and NiII) were synthesized and characterized by IR and UV-vis spectroscopies and magnetic susceptibility measurements. Dinuclear compounds containing a di-μ-pyrazole bridge are found in nitrate and thiocyanate complexes with the first two ligands, while mixed μ-hydroxo, μ-pyrazole-bridged structures are found in chloride complexes with the second ligand and nitrate complexes with the last ligand. © 1990.
|Publication status||Published - 1 Jan 1990|