Chiral and C2-symmetric seven-membered cycloalkanones 2--6 bearing 1,2-diphenylethane-1,2-diamine and cyclohexane-1,2-diamine backbones were synthesized and evaluated their asymmetry inductive behaviours in an asymmetric epoxidation of stilbene with oxone. Although the reaction of the ketones 2 and 3 of a 1,2-diphenylethane-1,2-diamine backbone gave stilbene oxide in trace to 31% yield, those o...

Di-1,1-chlorophenyl-2,2,2-trichloroethane (DDT) and its derivatives di-1,1-chlorophenyl-2,2dichloroethane (DDD), di-1,1-chlorophenyl-2,2-dichloroethene (DDE), and di-1,1-chlorophenyl-2-chloroethene (DDMU) were dechlorinated in heptane solution over a sulphide Ni-Mo/C catalyst in a batch reactor. The process was carried out at 150-260oC and hydrogen pressure of 3 MPa. For DDT, fast elimination o...

The direct experimental evidence shows that ethylbenzene disproportionation is a transition state shape selective reaction on zeolites: a bimolecular reaction mechanism via diphenylethane-mediated pathway on large-pore zeolites X and Y (ca. 0.74 nm) and a monomolecular reaction mechanism on medium-pore zeolites ZSM-5 (ca. 0.56 nm) via the ethoxy-mediated intermolecular ethyl group transfer. The...

Mg0/Pd4+ was able to dechlorinate >99% of extractable DDT (initial concentration of 10 mg DDT kg(-1) of soil) and >90% of extractable DDT (initial concentration of 50 mg DDT kg(-1) of soil) in soil slurry. Mg0/Pd4+ was also found to be effective in dechlorinating of 50 mg kg(-1) DDD and DDE, in soil aged for varying time periods. GC-MS analyses revealed the formation of 1,1-diphenylethane as an...

Electron transfer behavior of 1,2-diphenyl-o-carborane was investigated by cyclic voltammetry (CV). In the presence of 1,2-dibromo-1,2-diphenylethane, a significant catalytic current was observed. The macroscale electrocatalytic reduction of the dibromide using a catalytic amount (1 mol%) of the carborane mediator afforded the desired trans-stilbene in excellent yield.

The first example of a dyotropic rearrangement of an enantiomerically pure, conformationally unconstrained, vicinal dibromide confirms theoretical predictions: D and L-1,2-dibromo-1,2-diphenylethane racemise stereospecifically in refluxing benzene without crossover to the meso-isomer. An orbital analysis of this six-electron pericyclic process is presented.