Abstract
1H and 2H NMR spectra of the title copper(II) complexes and its derivatives have been measured. In contrast with their 1H NMR spectra, 2H NMR spectra gave well resolved sharp signals, and demonstrated that two diastereomers attributable to two asymmetric ligand nitrogens are readily resolved. The remarkable linewidth-narrowing was found in the peripheral methyl groups, which make 2H NMR spectra very useful even for copper(II) complexes with a long electron spin relaxation time. By using 2H NMR spectra, meso-racemate equilibrium was pursued and examined in aqueous and acetonitrile solutions.
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