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Titolo:
GAS-BUBBLES IN THE NMR TUBE - AN EASY WAY TO INVESTIGATE REACTIONS WITH GASES IN THE LIQUID-PHASE
Autore:
BAUMANN W; MANSEL S; HELLER D; BORNS S;
Indirizzi:
UNIV ROSTOCK,MAX PLANCK GESELL,ARBEITSGRP KOMPLEXKATALYSE,BUCHBINDERSTR 5-6 D-18055 ROSTOCK GERMANY UNIV ROSTOCK,MAX PLANCK GESELL,ARBEITSGRP ASYMMETR KATALYSE D-18055 ROSTOCK GERMANY
Titolo Testata:
Magnetic resonance in chemistry
fascicolo: 10, volume: 35, anno: 1997,
pagine: 701 - 706
SICI:
0749-1581(1997)35:10<701:GITNT->2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
KINETIC INVESTIGATIONS; ASYMMETRIC REDUCTION; CATALYST PRECURSORS; PROCHIRAL OLEFINS; HYDROGENATION; LIGANDS; MECHANISM;
Keywords:
NMR; H-1 NMR; C-13 NMR; P-31 NMR; ZIRCONIUM COMPLEXES; RHODIUM COMPLEXES; CATALYZED OLEFIN HYDROGENATION; REACTION KINETICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
W. Baumann et al., "GAS-BUBBLES IN THE NMR TUBE - AN EASY WAY TO INVESTIGATE REACTIONS WITH GASES IN THE LIQUID-PHASE", Magnetic resonance in chemistry, 35(10), 1997, pp. 701-706

Abstract

An easily accessible device for the study of reactions with gases in the liquid phase, consisting of a 10 mm NMR tube with a gas inlet, is presented. This arrangement serves for reaction monitoring and mechanistic studies by acquiring NMR spectra (H-1, C-13, P-31) with a resolution that allows one to observe and characterize intermediates that cannot be isolated as pure substances. The quantity of the gas to be consumed is not limited. Examples from organometallic chemistry are presented: the formation of a zirconacyclopentene from a zirconium-alkyne complex and ethylene and investigations on rhodium-catalysed olefin hydrogenation. The qualitative and quantitative evaluation of the measurements and application to reaction kinetics are discussed. An uptake of 0.1 ml of gas per minute at normal pressure (isobaric) is possible without a marked influence of diffusion (stationary conditions). (C) 1997John Wiley & Sons, Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 10:07:38