Nuclear Magnetic Resonance Studies of Sulfur Compounds. II. The Substituent Effect on Geminal Coupling Constants and on Magnetic Nonequivalence of the Methylene Protons of Sulfoxides.
作者:Motohiro Nishio
DOI:10.1248/cpb.15.1669
日期:——
Nuclear magnetic resonance spectra were obtained for a number of sulfoxides, whose methylene protons are magnetically nonequivalent. The coupling constants between these protons depend on the electronic properties of the substituent adjacent to the coupling protons. The substituent effect on magnetic nonequivalence was also studied and it is demonstrated that the electronic properties of the substituent constitute an important factor responsible for the magnitude of magnetic nonequivalence.
为若干亚砜得到了核磁共振谱,它们的甲撑质子在磁性上是属于非等性的。这些质子之间的偶合常数依赖于和偶合质子临近的取代基的电子性质。也对取代基对磁性非等性的影响作了研究,并证明取代基的电子性质是对磁性非等性大小起决定作用的一个重要因素。