Synthesis and Characterization of Osmium (III) Complexes with Substituted Nitrones

Abstract

New series of complexes of general formula [OsL(Cl)₂(H₂O)₂].nH₂O ; where LH=[alpha-(2-hydroxy-1-naphthyl)-N-(para-R-phenyl nitrone] , n=number of the crystallization water(0-6) and R=H, Cl , Br , COCH₃ , NHCOCH₃ , NH₂  and CH₃ were synthesized . The complexes were synthesized from direct reaction of the osmium(III) chloride with ligand (L) in a molar ratio of 1:1 respectively. These complexes were characterized by several physical methods such as melting points, molar conductance and elemental analysis(CHN),magnetic moments as well spectral such as  infrared and electronic spectral  measurements. These studies revealed that the Ligand (L) was behaved  as a bidentate, univalent and coordinated to the osmium(III) ion through the oxygen atoms of both , the hydroxyl and the  nitrone groups, as well, the presence of two chloride ions and two aqua molecules to give the most probable octahedral geometry around each osmium ion in each complex. The elemental analysis(CHN) as well the infrared spectra showed the presence crystallization water molecules outside the coordination sphere. Their molar conductance measurements revealed the non-electrolytic behavior of the synthesized complexes.

Keywords

• Osmium (III),Nitrone,Schiff base,Complexes

References

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