Resonance-stabilized phenylazo-ene-phenylimine cations of cyclobutanetetraone derivatives
作者:Hassan S El Khadem、Bruce Coxon
DOI:10.1016/s0008-6215(02)00119-2
日期:2002.11
Cyclobutenedione phenylazo-phenylamines A,ere found to exhibit bathochromic shifts in acidic media and hypsochromic shifts in basic media, like phenylazo-phenylhydrazones. The bathochromic shifts are due to the formation of resonance-stabilized cations and the hypsochromic shifts to enolization. The phenylazo-phenylamines and their cations and anions have been studied by NMR spectroscopy. (C) 2002 Elsevier Science Ltd. All rights reserved.