Raman Spectrum of 1.3.Cyclohexadiene

Abstract

WE published in May last year¹ an account of the Raman spectrum of 1.3.cyclohexadiene (obtained by the Harries-Willstätter method). Another method for the preparation of that compound is that of Crossley². However, Harries³ first and Willstätter and Hatt⁴ afterwards stated that the 1.3.cyclohexadiene prepared in accordance with Crossley's method was very impure as regards cyclohexene, bromocyclohexene and benzene. On the other hand, Willstätter⁴ stated that a pure 1.3.cyclohexadiene can be obtained with his method. In Fig. 1 we give the position of the Raman lines of the two samples of 1.3.cyclohexadiene prepared by us using these two methods.