Abstract: A Study on the Mass Spectrometry of 4,5Bisalkoxy1,2Dibromobenzenes and 4,5Bisbenzoxy1,2DibromobenzeneAuthor Lin Jimao(Department of Chemistry,Shandong University,Jinan 250100,China)Sun Yuanping(Jinan Medical Company,Jinan 250012,China)Received 19980801 Abstract Mass spectra of 4,5bisundecanoxy 1,2ibromobenzene,4,5bistetradecanoxy1,2dibromobenzene and 4,5bisbenzoxy1,2dibromobenzene were studied.The characteristics of the former two compounds are of CC bonds fragmentation of alkyl groups and OC bonds fragmentation accompanied by hydrogen migration of alkoxy groups.The characteristic of the latter is of simple CC bonds fragmentation and m/z 181 formation.Key Words: mass spectrometry,4,5bisalkoxy1,2dibromobenzene 4,5bisbenzoxy1,2dibromobenzene,fragmentation