Spectral kinetics of 3 + 3 dipolar thermal dimerization in some carbanion monosubstituted 3-(p-halo-phenyl)-pyridazinium ylid solutions

✍ Scribed by Dana Dorohoi; M. Cotlet; I. Mangalagiu

• Publisher: John Wiley and Sons
• Year: 2002
• Tongue: English
• Weight: 194 KB
• Volume: 34
• Category: Article
• ISSN: 0538-8066
• DOI: 10.1002/kin.10089

✦ Synopsis

Abstract

The visible intramolecular charge transfer band of some carbanion monosubstituted 3‐(p‐halo‐phenyl)‐pyridazinium ylids in benzene solutions has been considered as an indicator of the ylid stability. The catalytic effect of light on 3 + 3 dipolar thermal dimerization reaction was revealed. The dimerization reaction was found to be of the second order in the ylid concentration. The rate of dimerization was found to be promoted by increasing the electronegativity of the substituents on the ylid carbanion. The associated intramolecular charge transfer band oscillator strength has been correlated with the rate constant. © 2002 Wiley Periodicals, Inc. Int J Chem Kinet 34: 613–619, 2002