Determination of D[(C2H5)3Sn—C2H5] by the toluene carrier method and studies of the reaction of C2H5 with toluene

Abstract

The thermal decomposition of tetraethyltin in a toluene carrier flow System has been studied over the temperature range 725 to 833 K and decompositions of 3.4 to 98.0%. Total pressure in all runs were in the range 0.63 to 0.90 kPa and contact times of 0.59 to 4.2 s were used.The progress of the reaction was followed by carrying out full analysis of all pyrolysis products involving the C₂H₅ radical, assuming that all four C₂H₅ groups are released. In selected runs analysis for unreacted alkyl was also performed. The agreement between the two methods indicates that reaction 1 is followed rapidly by reactions 2, 3, and 4,[Formula: see text]or alternate reactions that result in the release of all four C₂H₅ groups each time reaction 1 occurs. The decomposition is essentially homogeneous and[Formula: see text]or −59 340/4.58T if the activation energy is expressed in cal rather than J. Combination of present values of k₅ with data from previous studies