The first simple and efficient method for the synthesis of mono and gem-difluorinated molecules using [C8mim][PF6] ionic liquid as a recyclable solvent medium with diethylaminosulfurtrifluoride (DAST) as the fluorinating reagent, is reported.
Conformational identification and dipole moment of 4-fluoro-1-butene by microwave spectroscopy
作者:Ying-Sing Li、Bih-Ying Liu、Gamil A. Guirgis
DOI:10.1016/0022-2860(87)87061-8
日期:1987.11
Abstract The microwave spectrum of 4-fluoro-1-butene has been recorded in the frequency region 26.5–40.0 GHz. A -type rotational transitions in the ground vibrational state have been assigned. The effective rotational constants and centrifugal distortion constants were determined to be A = 19 196 ± 323, B = 2132.48 ± 0.01, C = 2112.52 ± 0.01 MHz, D J = 0.70 ± 0.03 and D JK = −26.16 ± 0.05 kHz. Analysis
On the reactivity of naphthalene and biphenyl dianions: tying up loose ends concerning an S<sub>N</sub>
2-ET dichotomy in alkylation reactions
作者:Inmaculada Blasco、Henoc Pérez、Albert Guijarro
DOI:10.1002/poc.3423
日期:2015.6
Naphthalene and biphenyl dianions are interesting compounds that can be obtained by double reduction of the corresponding arenes in solution with certain alkali metals. These dianions are highly reactive and rather elusive species with very high laying and highly delocalized electrons. They share many aspects of the reactivity of the alkali metal they originated from and consequently behave primarily