S-33 NMR-SPECTROSCOPY - SUBSTITUENT GAMMA-EFFECT, HALOGEN-DERIVATIVESOF TETRAHYDROTHIOPHENE 1,1-DIOXIDE

Citation
Ab. Rozhenko et al., S-33 NMR-SPECTROSCOPY - SUBSTITUENT GAMMA-EFFECT, HALOGEN-DERIVATIVESOF TETRAHYDROTHIOPHENE 1,1-DIOXIDE, Magnetic resonance in chemistry, 33(11), 1995, pp. 853-856
Citations number
43
Categorie Soggetti
Spectroscopy,Chemistry
ISSN journal
07491581
Volume
33
Issue
11
Year of publication
1995
Pages
853 - 856
Database
ISI
SICI code
0749-1581(1995)33:11<853:SN-SGH>2.0.ZU;2-A
Abstract
A series of halogen-substituted tetrahydrothiophene 1,1-dioxides (sulp holanes) were investigated by C-13, O-17 and S-33 NMR spectroscopy. It was shown that successive replacement of hydrogen atoms in positions 3 and 4 of the sulpholane ring led to an increase in S-33 nuclei shiel ding, The S-33 NMR chemical shift range exceeded 39 ppm. The variation of the S-33 nuclei shielding with increasing number of chlorine or br omine atoms was caused by an electrostatic through-space effect of the halogen atoms and the strongly polarized C-Hal bonds.