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ZUSCHRIFTEN - Eliminative Ring Opening of Oxiranium Ions in the Gas Phase - Von stereoelektronischen Faktoren gesteuert wird eine neue Reaktion: Die Ringöffnung von Epoxiden unter Eliminierung, in saurer Lösung wegen der Dominanz der konkurrierenden nucleophilen Substitution bislang nicht beobachtet, kann in der Gasphase ablaufen. Die Befunde aus Kinetikstudien, die von der sorgfältigen theoretischen Untersuchung an einem Modellsystem gestützt werden, weisen auf einen konzertierten Mechanismus hin, bei dem der stereochemische Verlauf der Eliminierung von stereoelektronischen und konformativen Faktoren bestimmt wird (bei der gezeigten Reaktion wird das E-Isomer bevorzugt gebildet; kE > kZ)
Online Contents | 2000| -
COMMUNICATIONS - Eliminative Ring Opening of Oxiranium Ions in the Gas Phase - An unprecedented reaction governed by stereoelectronic factors: Eliminative ring opening of epoxides, unknown in acidic solution owing to the predominance of the competing nucleophilic displacement, can be made accessible in the gas phase. The kinetic evidence, supported by a comprehensive theoretical study on a model system, points to a concerted elimination mechanism in which stereochemistry is controlled by stereoelectronic and conformational factors (in the scheme, the E isomer is formed more readily than the Z isomer; kE > kz)
Online Contents | 2000| -
Search for dark matter from the centre of the Earth with 8 years of IceCube data
IOP Institute of Physics | 2021| -
Taste and Olfactory Disturbances After Upper and Middle Third Facial Fractures: A Preliminary Study
British Library Online Contents | 2002| -
DOSAGGIO QUALITATIVO DEGLI ANTICORPI HCV E HIV CON ADVIA CENTAUR: DUE VECCHI ESAMI NUOVI
British Library Conference Proceedings | 2004| -
STUDIES ON COFFEE ROASTING PROCESS BY MEANS OF NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY
British Library Online Contents | 2010| -
Short-term impact of two liquid organic fertilizers on Solanum lycopersicum L. rhizosphere Eubacteria and Archaea diversity
British Library Online Contents | 2015| -
Carbonic anhydrase inhibitors: topical sulfonamide antiglaucoma agents incorporating secondary amine moieties
British Library Online Contents | 2000| -
Evaluation of the esthetic results of a 40-patient group treated surgically for dentoskeletal Class III malocclusion
British Library Online Contents | 2003| -
Is Throat Screening Necessary To Detect Methicillin-Resistant Staphylococcus aureus Colonization in Patients upon Admission to an Intensive Care Unit?
British Library Online Contents | 2007| -
Emergence of OXA-48-producing Enterobacteriaceae in Switzerland
British Library Online Contents | 2012| -
Substituent Effects on the Stereochemistry of Gas-Phase Intracomplex Nucleophilic Substitutions
British Library Online Contents | 2006|
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