Heats of Formation of Radicals and Molecules by a Photoacoustic Technique

A photoacoustic technique was used to measure heats of free radical reactions. To illustrate the method, bond dissociation energies were measured for the Sn–H bond in n-Bu3SnH, for the C3–H bond in 1,4-cyclohexadiene, and for the C2–H bond in diethyl ether. Heats of formation of t-BuOPPh3and t-BuOP(Bu-n)2were determined, and the method was also used to measure quantum yields for the photolysis of di-tert-butyl peroxide and diphenyl disulfide. © 1986, American Chemical Society. All rights reserved