A new series of chloride transition metal complexes containing a diethyl (pyridyn-2-ylmethyl) phosphate (2-pmOpe) ligand, of the general formula [M(2-pmOpe)2Cl2] (M = Cu, Ni, Mn) and [M(2-pmOpe)Cl2] (M = Co, Zn), were synthesized and studied. The stoichiometry and stereochemistry of the compounds were confirmed by elemental analysis, spectroscopic and magnetic studies. The ligand containing two donor atoms, heterocyclic pyridyl nitrogen and phosphoryl oxygen atoms, binds in a didentate chelate manner in all complexes. The octahedral (Cu, Ni, Mn) and tetrahedral (Co, Zn) coordination sphere complete chloride ions included in coordination. The magnetic behaviour (for paramagnetic centres) and spectroscopic analyses of the complexes indicate a mononuclear structure and suggest existence of a very weak exchange coupling between the metal centres in the crystal lattice.
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