正丙硫基苯氧基N-烷基磷酰胺δ_P^(31)与烷基物化参数的关系及其偶合常数特点

The Relationship between the δ_P^(31) of Phenoxyl N-alkyl (n-propylthio) Phosphoiamides and the Physico-chemical Parameters of N-alkyl, and the Features of Coupling Constants of Phosphorus-Hydrogen

探讨了正丙硫基苯氧基磷酰胺的δ3 1P与胺基上烷基的多种物化参数的关系 ,并对其偶合常数3 JPSCH和3 JPNCH的特点进行了解释。线性回归分析表明 :δ3 1P与Taft常数σ 有良好的正相关性 ,并受烷基的立体效应的影响 ;本系列化合物的偶合常数一般3 JPSCH>3 JPNCH。

This paper investigated the relationship between the δ 31 P of phenoxyl N alkyl( n propylthio) phosphoramides and the physico chemical parameters of N alkyl. The features of the coupling constants ( 3 J PSCH and 3 J PNCH ) were analyzed and reasonable interpretations were given. The linear regression results showed that δ 31 P had good positive correlation with Taft constant (σ *) and were influenced by stereoeffects. In general, the values of 3 J PSCH were greater than those of 3 J PNCH ,which reflected the bonding properties of P\_N and P\_S bonds in the molecules.