Polar substituent effects in the sodium borohydride reduction of 2- and 3- substituted fluorenones
作者:G.G. Smith、R.P Bayer
DOI:10.1016/s0040-4020(01)93246-6
日期:1962.1
The kinetics in the sodium borohydride reduction of fluorenone and twelve 2- and 3-substituted fluorenones were determined at three temperatures in isopropyl alcohol and the entropies and enthalpies of activation calculated. A linear Hammett σ ϱ plot was obtained using meta and para σ constants. The positive ϱ value (ϱ = +2·65) confirmed the nucleophilicity of sodium borohydride. Deviations of the