1233242-05-1Relevant articles and documents
Spectroscopic and electron-transfer reactivity studies of bulky bis(N-cycloalkyl-3,5-tBu2-salicylaldiminato)copper(II) complexes: Generation of uncoordinated and coordinated phenoxyl radicals
Kasumov, Veli T.,K?ksal, Fevzi,Kutluay, Ay?egül
experimental part, p. 99 - 106 (2010/08/06)
This work summarizes the results of our studies on the spectral, magnetic, electrochemical and chemical redox properties of N-cycloalkyl-3,5-tBu2-salicylaldimine ligands [cycloalkyl = cyclo-C5H9(HL1), cyclo-C6H11 (HL2), cyclo-C7H13 (HL3), cyclo-C8H15 (HL4), 1-adamantyl (HL5), 2-adamantyl (HL6)] and their copper(II) complexes (1-6). The compounds have been characterized by IR, 1H NMR, UV-vis, EPR spectroscopy, electrochemical and magnetic susceptibility measurements. The geometry of 1-6, according to their EPR (gII and gII/AII) and visible spectral data, exhibit a significant amount distortion from slightly distorted square-planar to pseudo-tetrahedral. The cyclic voltammetric studies of 1-6 reveal that as the extent of the tetrahedral distortion of CuII center increases on going from 1 to 5, the values of CuII/CuI potentials became more negative. The compounds have been oxidized electrochemically and chemically and the generated relatively stable uncoordinated phenoxyl [HLx]{radical dot}+ and coordinated Cu(II)-phenoxyl radical [1-6]{radical dot}+ species have been characterized by UV/vis and EPR spectroscopy.
