THE SPIN-DELOCALIZATION SUBSTITUENT PARAMETER SIGMA-CENTER-DOT-JJ. .9. CYCLODIMERIZATION RATES OF PARA-METHYLSULFINYL AND PARA-METHYLSULFONYL ALPHA,BETA,BETA-TRIFLUOROSTYRENES
Xk. Jiang et al., THE SPIN-DELOCALIZATION SUBSTITUENT PARAMETER SIGMA-CENTER-DOT-JJ. .9. CYCLODIMERIZATION RATES OF PARA-METHYLSULFINYL AND PARA-METHYLSULFONYL ALPHA,BETA,BETA-TRIFLUOROSTYRENES, Journal of fluorine chemistry, 66(2), 1994, pp. 187-192
F-19 NMR data and rate constants for the thermal cyclodimerization of
para-methylsulfinyl alpha,beta,beta-trifluorostyrene (1) and para-meth
ylsulfonyl alpha,beta,beta-trifluorostyrene (2) have been measured. On
the basis of these data, the sigma(mb) and sigma(JJ). values for p-Me
SO and p-MeSO2 groups have been evaluated. Three methods for the calcu
lation of the sigma(JJ). scale yielded the same set of sigma(JJ). cons
tants.