18370-19-9Relevant academic research and scientific papers
Kinetics and mechanism of the dehydrohalogenation of Ar2CHCX3 and Ar2CHCHX2 by strong N-bases
Schroeder, Grzegorz,Leska, Boguslawa,Gierczyk, Blazej,Bartosz Rozalski,Brzezinski, Bogumil
, p. 173 - 179 (2007/10/03)
The kinetics and mechanism of the elimination reactions of 1,1,1- trifluoro-, 1,1,1-trichloro-, 1,1,1-tribromo-, 1,1-dichloro- and 1,1-dibromo- 2,2-bis(4-nitrophenyl)ethanes and two strong N-bases: 1,5,7- triazabicyclo[4.4.0]dec-5-ene (TBD) and 7-methyl-1
CARBANIONS IN E1cB ELIMINATION AND ADDITION REACTIONS
Schroeder, G.,Leska, B.,Przybyl, J.
, p. 2063 - 2070 (2007/10/02)
Visible absorption spectra of the reaction products of di(4-nitrophenyl)methanes derivatives with bases promoted by macrocyclic compounds, are discussed.The kinetic and equilibrium measurements are reported for the reactions: 1,1,1-trifluoro-2,2-di(4-nitr
KINETICS AND ISOTOPE EFFECTS OF THE β-ELIMINATION REACTIONS OF 1,1-DICHLORO-2,2-BIS-(4-NITROPHENYL)-ETHANE PROMOTED BY PIPERIDINE, PYRROLIDINE AND QUINUCLIDINE BASES IN ACETONITRILE SOLVENT
Dworniczak, Miroslaw,Jarczewski, Arnold
, p. 599 - 604 (2007/10/02)
The kinetics of the reaction of 1,1-dichloro-2,2-bis-(4-nitrophenyl)ethane (I) with piperidine, pyrrolidine and quinuclidine bases in acetonitrile solvent are reported.The reaction is complex, leading to 1-amino-2,2-bis-(4-nitrophenyl)ethene (III) as the final product via the intermediate 1-chloro-2,2-bis-(4-nitrophenyl)ethene (II).The reaction shows a 100percent conversion of the substrate (I) to (II).The rate of reaction of I to II is several times faster than II to III, allowing for kinetic measurements of the initial step.The entropies of activation (ΔS*/J mol-1K-1) are negative and large (-184, -149, -145) for the reaction with piperidine, pyrrolidine and quinuclidine respectively.The free enthalpy of activation (ΔG*/kJ mol-1) are rather small, oscillating between 75-79 kJ mol-1.The kinetic isotope effects kH/kD fall between 6.8 and 7.6 at 20 deg C.The results obtained are interpreted in terms of E2H with a contribution of (E1cB)I mechanism.
Kinetics and Isotope Effects of the Dehydrochlorination of 1,1-Dichloro-2,2-bis-(4-nitrophenyl)ethane with 1,5-Diazabicyclonon-5-ene in Aprotic Solvents
Schroeder, Grzegorz,Jarczewski, Arnold
, p. 964 - 970 (2007/10/02)
The kinetics of the reaction of 1,1-dichloro-2,2-bis-(4-nitrophenyl)ethane (1) with 1,5-diazabicyclo-non-5-ene (DBN) in acetonitrile (MeCN), dichloromethane (DCM), tetrahydrofuran (THF), isopropylether (IPE) and hexane (Hex) solvents are reported.T
KINETICS, ISOTOPE EFFECTS AND MECHANISM OF THE REACTION OF SOME DINITROPHENYLETHANES WITH SODIUM PROPANETHIOLATE IN PROPANOL
Schroeder, Grzegorz
, p. 565 - 576 (2007/10/02)
The reaction between Ar2CHCF3, Ar2CHCCl3, Ar2CHCHCl2 (where Ar=O2NC6H4) and sodium propanethiolate in propanol has been investigated.The reaction of Ar2CHCF3 with sodium propanethiolate gave the following alkenes: Ar2C=CF2, Ar2C=CF(SPr) and Ar2C=C(SPr)2,
Kinetics and isotope effects of the β-elimination reactions of some 2,2-di(4-nitrophenyl)chloroethanes promoted by tetramethylguanidine in aprotic solvents
Jarczewski, Arnold,Waligorska, Malgorzata,Leffek, Kenneth T.
, p. 1194 - 1197 (2007/10/02)
Rate constants for the β-elimination of HCl from 2,2-di(4-nitrophenyl)-1,1-dichloroethane (I) and 2,2-di(4-nitrophenyl)-1,1,1-trichloroethane (II) promoted by tetramethylguanidine in the aprotic solvents acetonitrile, tetrahydrofuran, and n-hexane have be
