
%0 Journal Article
%A Ang, KP 
%A Lee, TWS 
%T High acidity disulphonyl carbon acids
%J Australian Journal of Chemistry
%D 1977/03/01
%V 30
%N 3
%P 521-525
%K 
%R https://doi.org/10.1071/CH9770521
%U https://www.publish.csiro.au/paper/CH9770521 
%X Four disulphonyl carbon acids, (PhCH2SO2)2CHY (Y = H, Ph,p-CNC6H4,p- NO2C6H4), have been synthesized and their ionization constants determined by spectrophotometric measurements in 80% (w/w) dimethyl sulphoxide- water at 25°C. The pKa values, ranging from 11.65±0.02 to 7.75±0.02, present strong evidence for the conjugative effect of the two sulphonyl groups attached to the carbon acids. 
