Electron impact studies. Part XCIV. Retro-Diels–Alder reaction in negative-ion mass spectrometry. Nitro-2H,4H-1,3- and -2,3-dihydro-1,4-benzodioxins

Author(s):  
John H. Bowie ◽  
Ah Chai Ho
1971 ◽  
Vol 24 (9) ◽  
pp. 1853 ◽  
Author(s):  
T Blumenthal ◽  
JH Bowie

The negative-ion mass spectra of 3- and 4-nitrophthalic anhydride contain a series of rearrangement ions. One of these, an M-CO2 ion, is mainly produced by loss of CO from the anhydride unit together with an oxygen of the nitro group.


1971 ◽  
Vol 24 (5) ◽  
pp. 989 ◽  
Author(s):  
JH Bowie

The three nitrophenyltrifluoroacetamides are readily differentiated by negative-ion mass spectrometry. Many unusual fragmentations are noted in these spectra and certain of these have been substantiated by labelling and defocusing studies.


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