Crystal structure of methyl trans-3-[(2-(methoxycarbonyl) phenyl)sulfinyl]acrylate: a product resulting from trapping of a sulfenic acid by methyl propiolate

Evidence for the formation of unstable sulfenic acids (RSOH) as reaction in termediates is commonly provided by trapping these compounds with methyl pr opiolate. The crystal structure of a vinyl sulfoxide derived from the trapp ing of a sulfenic acid with methyl propiolate is reported here. The title c ompound C12H12O5S crystallized in the triclinic space group, P1 with unit c ell parameters: a = 6.1600(4), b = 9.7286(7), c = 11.3698(8) Angstrom, alph a = 112.024(1), beta = 94.662(1), gamma = 95.429(1)degrees, and Z = 2.