Previous Issues
Volume :26 Issue : 2 1999
Add To Cart
Download
Synthesis and photochromic properties of E,E-Bis-ل-(2,5-dimethyl-3-furyl)ethylidenesuccinic anhydride and its 2-dicyaDomethylene derivative
Auther : ABDULLAH MOHAMED ASIRI
Chemistry Department, Faculty of Science, King Abdul-Aziz University, Jeddah 21413, P.O. Box 9028, Saudi Arabia
ABSTRACT
The deep yellow fulgide 6 and its dicyanomethylene 9 underwent a conrotatory ring closure to the colored forms 7 and 10 respectively. The latter compounds revert back to the original forms on exposure to white light. The replacement of the carbonyl group by the dicyanomethylene group resulted in a large bathochromic shift of both the colored and uncolored forms 9 and 10 respectively.