Detail of "1003-78-7"

Reference

Thiophene dioxide derivatives

Thiophene dioxide derivatives. V. Carbon-13 NMR spectroscopy and LIS in proton spectra in determination of the molecular geometry of 2,5-dihydrothiophene dioxide derivatives. Kabzinska, Krystyna (Inst. Fundam. Probl. Chem., Univ. Pasteura, Warsaw, Pol.). Bull.There are some reagents with their cas registry numbers 1003-78-7 and 50590-79-9 are used in this study. Acad. Pol. Sci., Ser. Sci. Chim., 24(5), 363-74 (English) 1976. CODEN: BAPCAQ. DOCUMENT TYPE: Journal CA Section: 22 (Physical Organic Chemistry) The 13C NMR and lanthanide (LIS) and benzene-induced chem. shifts in the 1H NMR of I (R = R1 = H, Me; R = Me, R1 = H), II, and III (R = R1 = H, Me) were related to their mol. structures. Bond angle distortion, due to the nuclear repulsion of substituents in the planar ring skeleton, occurred in the 3-sulfenes. Steric interactions were diminished due to the relief of strain through the puckering of the tetrahydrothiophene ring in the sulfolanes. The shifts of .gamma.-C atoms reflected large steric effects of the S-O bond; heteroatom inductive effects were limited to the .alpha.-C atoms. .