activation of CCl bonds of hydrochlorofluoromethanes and chloromethanes at moderate reaction conditions using ACF in a combination with Et3GeH is presented. The reactions of the chloromethanes (CH3Cl, CH2Cl2, CHCl3 and CCl4) in the presence of Et3GeH and ACF as catalyst led to the activation of only one CCl bond resulting in the hydrodechlorination. Friedel-Crafts reactions with benzene as solvent are suppressed
The conformational distribution in diphenylmethane determined by nuclear magnetic resonance spectroscopy of a sample dissolved in a nematic liquid crystalline solvent
作者:G. Celebre、G. De Luca、J. W. Emsley、E. K. Foord、M. Longeri、F. Lucchesini、G. Pileio
DOI:10.1063/1.1555631
日期:2003.4.8
The deuterium decoupled, proton nuclear magneticresonance spectrum of a sample of diphenylmethane-d3 dissolved in a nematic liquidcrystallinesolvent has been analyzed to yield a set of dipolar couplings, Dij. These have been used to test models for the conformational distribution generated by rotation about the two ring-CH2 bonds through angles τ1 and τ2. Conformational distributions, particularly
'Al'l about F: Aluminum chlorofluoride (ACF) catalyzes the hydrodefluorination, as well as Friedel–Crafts reactions of fluorinated methanes in the presence of Et3SiH. A surface‐bound silylium‐ion‐like species is considered to be a crucial intermediate in achieving the CF bond cleavage.
Activation of Chlorinated Methanes at the Surface of Nanoscopic Lewis Acidic Aluminum Fluorides
作者:Agnieszka K. Siwek、Mike Ahrens、Michael Feist、Thomas Braun、Erhard Kemnitz
DOI:10.1002/cctc.201601238
日期:2017.3.8
toluenes and 1,2‐dichloroethane were also tested. The strong Lewis acids are able to promote the cleavage of C−Cl bonds in the presence of Et3SiH. The C−Cl bonds were converted into C−Hbondsthrough hydrodechlorination reactions or, in the presence of benzene, into C−Cbondsthrough Friedel–Crafts type reactions. The catalytic reactions show high conversions.
Deoxygenative Reduction of Carbon Dioxide to Methane, Toluene, and Diphenylmethane with [Et2Al]+ as Catalyst
作者:Manish Khandelwal、Rudolf J. Wehmschulte
DOI:10.1002/anie.201201282
日期:2012.7.16
The strong Lewis acid [Et2Al]+ catalyzes the reduction of carbon dioxide with hydrosilanes under mild conditions to methane. In benzene solution, the side products toluene and diphenylmethane are also obtained through Lewis acid catalyzed benzene alkylation by reaction intermediates.