作者:Hikaru Yanai、Pedro Almendros、Saori Takahashi、Carlos Lázaro-Milla、Benito Alcaide、Takashi Matsumoto
DOI:10.1002/asia.201800769
日期:2018.8.6
Phosphorus 1,3‐ and 1,4‐carbabetaines with ′P(+)−C−C(−)′ and ′P(+)−C−C−C(−)′ structures, respectively, in which the carbanion moiety was significantly stabilized by two trifluoromethylsulfonyl groups, have been synthesized and characterized. Analysis of their X‐ray crystal structures revealed that any attractive interactions between the anionic and cationic moieties were negligibly weak. This result
分别具有'P(+)-C-C(-)'和'P(+)-CC-C(-)'结构的磷1,3-和1,4-氨基甲酸甜菜碱,其中碳负离子部分合成和表征了由两个三氟甲基磺酰基显着稳定的二甲基甲酰胺。对它们的X射线晶体结构的分析表明,阴离子和阳离子部分之间的任何有吸引力的相互作用都微不足道。通过使用自然键轨道(NBO)和Bader的原子分子量子理论(QTAIM)模型,可以证实这一结果。相比之下,对已知的1,3-卡巴甜菜碱当量进行相同的分析,可以得出“ P(+)-CC-C = C-O(-)”的共振结构,结果表明两者之间存在明显的电荷转移相互作用阴离子和阳离子部分。