EPR studies on some copper(II) complexes of 1,4,7,10-tetra-azadecane and its hexamethyl derivative |
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| Authors: | M Massacesi G Ponticelli MN Chary BA Sastry |
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| Institution: | Istituto Chimico Policattedra, Universita di Cagliari, Via Ospedale 72, 09100 CagliariItaly;Physics Department, Osmania University, Hyderabad-500 007 India |
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| Abstract: | EPR studies have been carried out on solutions of the complexes Cu(trien)NCS](NO3), Cu(trien)I]I, Cu(Me6trien)NCS]B?4 and Cu(Me6trien)](ClO4)2, (trien = 1,4,7,10-tetraazadecane; Me6trien = hexamethyl trien) in different solvents to investigate the solute-solvent interactions. From calculations of the 4s contribution in the ground state and bond parameters it is found that the axial bond in Cu(trien)NCS](NO3) dissolved in pyridine is weaker than that in the other complexes dissolved in different solvents. For the two methylated complexes, in spite of the +I effect of the methyl group, the in-plane copper-nitrogen bonds are found to be weak, which is probably due to the changes in structure caused by methylation. |
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