Synthesis And Characterization Of New Metal Complexes Derived From 14-dihydroquinoxaline -2 3- Dione Orthophenylenediamine And Hydroquinone.
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Metal complex of the type [MLCI2], M=Zn(II), L=tetra- dentate cyclic ligand, has been preparedrnthrough the condensation of orthophenylenediamine and 1,4-dihydroquinoxaline-2,3-dione in thernpresence of ZnCl2 (template system). The ligand coordinates through the four imine nitrogenrnatoms formed up on condensation of –NH2 function of orthophenylenediamine with C=O groupsrnin 2-position of quinoxaline -2,3-dione. Another metal complex of zinc (II) was synthesized withrn1,4-dihydroquinoxaline-2,3-dione and hydroquinone with behaving as mixed ligand system. Theserncomplexes have been characterized with the help of various spectral technique, such as 1H andrn13CNMR, FT-IR, AAS elemental analysis and measurement of molar conductance inrn1x 10-3 M solutions of DMSO. Furthermore, the determination of chloride test in metal contentrnsupports the concluded structures. The octahedral geometry was proposed for Zn-L complex andrnsquare planar for Zn (QXD) (HQ) complex.
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