
%0 Journal Article
%A Porter, QN 
%A Ramsay, CR 
%T Mass spectrometric studies. IX. Benzylidenemalonic esters and related compounds
%J Australian Journal of Chemistry
%D 1971/04/01
%V 24
%N 4
%P 823-834
%K 
%R https://doi.org/10.1071/CH9710823
%U https://www.publish.csiro.au/paper/CH9710823 
%X Skeletal rearrangements resulting from alkoxy-group migrations are prominent in the mass spectra of some benzylidenemalonic esters, and involve elimination of C3O2 as a neutral fragment. Similar rearrangements of a chloride atom dominate the mass spectra of benzylidenemalonyl chloride, but migrations of alkyl and aryl groups are unimportant in the mass spectra of structurally related benzylidene &#946;-diketones. The rearrangements observed have been rationalized as the result of a four-centre migration to a carbonium ion centre. 
