The preparation of 1-bromo-1-propyne by the dehydrobromination of 1, 1, 2- tribromopropane has been reported3 but the analysis of the product was sufficiently in error to cast serious doubt upon the purity of the 1-bromo-1-propyne (Calcd. for C3H3-Br: Br, 67.2. Found: Br, 55.6, 57.7, 56.3). The only other reference to the synthesis of 1-bromo-1-propyne is that of Cleveland and Murray4 who prepared it by the reaction between propyne and ...