
TY  - JOUR
A1  - Duewell, H 
A1  - Haig, TJ 
T1  - A Neighboring Group Effect of Carbonyl as Shown in the Mass Fragmentation Patterns of 4-Oxochroman-5-acetic Acids and of Some Related Compounds
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1988
VL  - 41
IS  - 4
SP  - 535
EP  - 548
KW  - 
UR  - https://doi.org/10.1071/CH9880535 
N2  - Two examples of a neighbouring group effect of carbonyl first observed with 4-oxochroman-5-acetic acids are shown to occur quite generally during electron impact mass spectrometry of 2-acylbenzeneacetic acids, 2-acylbenzoic acids and their methyl esters. The free acids readily give the [parent - CO2] ion. 2-Acylbenzeneacetic acids and their methyl esters after loss of water or methanol, respectively, as a first step, lead to very stable isobenzofuran radical cations which form the base peaks in the mass spectra of the esters. 
ER  -

