Hydrogen bonding of hydroxy groups to carbanions in indenide- and fluorenide-derivatized alcohols directly observed by UV, IR, and NMR spectroscopy
作者:Ian Mc Ewen、Mats Roennqvist、Per Ahlberg
DOI:10.1021/ja00063a019
日期:1993.5
For investigation of hydrogen bonding to carbanions a number of carbanions containing hydroxy groups have been designed and synthesized. The carbanions were of the type R'-CR 2 -CHR-CR 2 -OH, with R'being an indenide or a fluorenide group and R a methyl group or a hydrogen, and were generated from the corraponding indenes and fluorenes. Intramolecular hydrogen bonding was observed by UV, IR, and NMR
为了研究与碳负离子的氢键合,已经设计并合成了许多含有羟基的碳负离子。碳负离子的类型为 R'-CR 2 -CHR-CR 2 -OH,其中 R' 是茚基或芴基,R 是甲基或氢,并且由茚和芴相互对应生成。在极性 [二甲亚砜 (DMSO) 和四氢呋喃 (THF)] 和非极性(苯和甲苯)非氢键供体溶剂中,通过 UV、IR 和 NMR 光谱观察到具有适当设计的碳负离子的分子内氢键。在后一种溶剂中,穴状配体 211 用于络合反锂 + 阳离子