Isomere Kupfer(II)-Chelate mit Liganden vom Cuprointyp

摘要

Two pairs of isomeric copper(II) chelates of the composition Cu(dm)(NO3)2and Cu(dp)(NO3)2, resp., have been prepared (dm=6,7-dihydro-5,8-dimethyl-dibenzob,j1,10phenanthroline), anddp=6,7-dihydro-5,8-diphenyl-dibenzob,j1, 10-phenanthroline). By ESR, IR, and visible reflectance spectra the structures of the first coordination sphere of these chelates have been established, the two Cu(dm) (NO3)2chelates and the brown α-Cu(dp) (NO3)2, having coordination number six while the green β-Cu(dp) (NO3)2has coordination number seven. In comparison with the diamagnetically diluted complexes (solution, powder) the isomerism is found to be typical only for undiluted copper(II) complexe