Abstract
A number of divalent 3d metal chloride and perchlorate complexes with isoxazole were obtained by interaction of salt and ligand in triethyl orthoformate-ethanol. Characterization of these complexes was based on spectral (ir--electronic), magnetic and conductance evidence. The metal perchlorate complexes are of the following types (L = isoxazole): [FeL 2(OH 2) 4](ClO 4) 2 [CoL 3(OH 2) 3](ClO 4) 2, [NiL 4(OH 2) 2](ClO 4) 2 and [CuL 3(OH 2)](ClO 4) 2. The former three cationic complexes are low-symmetry hexacoordinated, while the Cu(II) complex is distorted square-planar. Isoxazole acts as a monodentate N-ligand in these compounds. NiCl 2 forms a 1:2 complex with isoxazole, containing both terminal and bridging chloro and isoxazole (N and O,Nbonded) ligands. This compound is polynuclear, hexacoordinated ([NiL 2Cl 2]x). CuCl 2 yields a 1:1 complex with this ligand. This compound is binuclear, square planar, involving terminal chloro and bridging, O,N bonded, isoxazole ([Cl 2Cu(OC 3H 3N) 2 CuCl 2]).
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