Synthesis and spectroscopic characterization of copper (II) metal complexes of a 16 membered pentaaza (N5) bis (macrocyclic) complexes

Copper (II) complexes were synthesized with 1,1’-diphenyl, and 1,1’-diphenyl methane– bis(8,10-dimethyl-1,3,7,11,15-pentaazacyclohexadeca-7,11-diene) a tetradentate ligand (L) and characterized by elemental analysis, molar conductance measurements, IR, electronic and EPR spectral studies. The molar conductance measurements of all the complexes in DMF solution correspond to non-electrolytic nature for (ML)2RX4 complexes,1:4 electrolytes for (ML)2RY4 . Thus the complexes may be formulated by [(ML)2RX4 ] and [(ML)2R]Y4 respectively [where M = Cu (II), R = (C6H4NH2 ) 2 , (C6H4NH2 ) 2CH2 ., X= Cl, CH3COO, NO3 - and Y = ClO4 - . All the complexes are of the high-spin type and found to have six-coordinated octahedral geometry except the complexes of perchlorate which were four coordinate and square planar in geometry.

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