Hydrogen bonded carbanions directly observed by 1H n.m.r. and i.r. spectroscopy
Abstract
Intramolecular hydrogen bonding between the fluorenide and indenide anions and the hydroxy groups of 9-(3-hydroxy-1,1,2,3-tetramethylbutyl)fluoren-9-ide (1) and 3-(3-hydroxy-1,1,2,3-tetramethylbutyl)inden-3-ide (7), respectively, in dimethyl sulphoxide has been observed by 1H n.m.r. and i.r. spectroscopy.