摘要:
Novel aryl-aryl, alkyl-alkyl, aryl-alkyl N,N'-disubstituted phenanthrene-9,10-diimines were synthesized by condensation of 9,10-phenanthrenequinone with primary amines. The novel two-stage method of synthesis of disubstituted phenanthrene-9,10-diimines with identical or different aryl and alkyl sub-stituents at the nitrogen atom was established. The investigated compounds undergo slow Z-EIE-Z interconversion which was studied by NMR spectroscopy. Thermodynamic parameters of interconversion were obtained by variable temperature NMR spectroscopy. (C) 2011 Published by Elsevier Ltd.