Abstract

The template reaction of isonitrosoacetylacetone (Hina) witho-phenylenediamine (o-phenen) in the presence of (MeCO2)2Ni·4H2O in EtOH yielded three types of nickel(II) complexes (depending on the molar ratio of the reactants) formulated as L1Ni(O2CMe)·2H2O (1), (L1)2Ni (2), and L2Ni·H2O (3). HL1 and H2L2 are the half unit and symmetric Schiff base ligands obtained from the (1∶1) and (2∶1) condensation of (Hina) with (o-phenen) respectively. The (1∶1) molar ratio reaction of (1) with either acetylacetone (Hacac) or (Hina) in CHCl3 led to the formation of mixed ligand complexes L1Ni(acac)·H2O (4) and L1Ni(ina)·H2O (5) whereas a similar reaction with salicylaldehyde (Hsal) produced L3Ni (6); H2L3 is the unsymmetric Schiff base formed by the (1∶1) condensation of the amino group in (1) with (Hsal). Analytical, spectral and magnetic moment evidence are compatible with the suggested structures of the metal complexes.

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