
%0 Journal Article
%A Blackman, GL 
%A Brown, RD 
%A Brown, RFC 
%A Eastwood, FW 
%A McMullen, GL 
%A Robertson, ML 
%T Methyleneketenes and methylenecarbenes. X. Precursors for the generation of methyleneketene and deuterated methyleneketenes for microwave spectroscopy
%J Australian Journal of Chemistry
%D 1978/01/01
%V 31
%N 1
%P 209-213
%K 
%R https://doi.org/10.1071/CH9780209
%U https://www.publish.csiro.au/paper/CH9780209 
%X The synthesis of a mixture of deuterated cyclopentadiene adducts (3) required for the pyrolytic generation of CHD=C=C=O and CD2=C=C=O is described. Methyleneketene is conveniently generated for microwave spectroscopy by flash vacuum pyrolysis of acrylic anhydride at 510- 560&#176;. Pyrolysis of diphenylmethyl propiolate gives benzophenone and methyleneketene (or its decomposition products)as the major process, but minor processes leading to diphenylmethane, fluorene and 3-phenylphthalide also occur. 
