Thermal decomposition of iodobenzene using I-atom absorption

• Published in: Chemical physics letters Vol. 269; no. 1; pp. 99 - 106
• Main Authors: Kumaran, S.S., Su, M.-C., Michael, J.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.04.1997
• ISSN: 0009-2614; 1873-4448
• DOI: 10.1016/S0009-2614(97)00256-X

The I-atom atomic resonance absorption spectrometric (ARAS) technique has been used in Kr bath gas to study the thermal decomposition kinetics of iodobenzene, C 6H 5I, over T- and P-ranges of 1082–1416 K and 103–731 Torr, giving the first order expression, k(±60%) = 1.982 × 10 11 exp(−23120 K/ T)s −1. Two unimolecular theoretical approaches were used to rationalize the data implying E 0 = δ H 0 0 = (66.7 ± 0.7) kcal mol −1 and 〈 δE〉 down = (447 ± 92) cm −1.