engleski

Synthesis and characterization of cobalt(II), nickel(II) and copper(II) perchlorate complexes with bis [(diphenylphosphinyl)methyl] phenylphosphine oxide, bis [(disphenylphosphinyl)methyl]ethyl phosphinate, and bis [(diphenylphosphinyl)methyl] phosphinic acid

The synthesis and characterization of cobalt(II), nickel(II) and copper(II) perchlorate complexes containing bis[(diphenylphosphinyl)methyl]phenylphosphine oxide (RPPh), bis[(diphenylphosphinyl)methyl]ethyl phosphinate (RPOEt), and bis[(diphenylphosphinyl)methyl]phosphinic acid (RPOH) have been studied. The substituent at the central phosphorus atom of the ligand is responsible for the types of complexes formed. The new complexes [M(RPPh)_2](ClO_4)_2 center dot nH_2O, [M(RPPh)_3](ClO_4)_2 center dot 4H_2O, [M(RPOEt)_2](ClO_4)_2 center dot 2H_2O, and [M(RPOH)_3](ClO_4)_2 center dot nH_2O are characterized as high-spin species and most of them have an octahedral or distorted octahedral geometry [M = Co(II), Ni(II), or Cu(II) ; n = 2-5]. The coordination of two P=O groups from one ligand to the metal has been proposed for most of the complexes formed. The coordination of all three P=O groups has been assumed for complexes [M(RPPh)_2](ClO_4)_2 center dot nH_2O and [M(RPOEt)_2](ClO_4)_2 center dot 2H_2O.

transition metal complexes ; cobalt(II) ; nickel(II) ; copper(II) ; tripode organophosphorus ligands ; phosphine oxides

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