Nuclear magnetic resonance spectroscopy reactions

Surface modification of polyvinyl chloride films, both plasticised and unplasticised, using amino thiophenol in dimethyl formamide and water mixtures, was examined using attenuated total reflection fourier transform infrared spectroscopy, Raman spectroscopy and nuclear magnetic resonance spectroscopy. Reaction kinetics, and the amount of dioctyl phthalate plasticiser leached out during the reaction were determined. Surface selectivity and degree of modification was found to depend on reaction time. 19 refs. 

Nuclear Magnetic Resonance Spectroscopy Reaction order (dimensionless)... 

The presence of iminium salts can be detected by chemical means or by spectroscopic methods. The chemical means of detecting iminium salts are reactions with nucleophiles and are the subject of this review. The spectroscopic methods are more useful for rapid identification because with the large number of model compounds available now the spectroscopic methods are fast and reliable. The two methods that are used primarily are infrared and nuclear magnetic resonance spectroscopy. Some attempts have been made to determine the presence of iminium salts by ultraviolet spectroscopy, but these are not definitive as yet (14,25). 

In either dilute or concentrated solutions, additional reactions occur that result in both intra- and intermolecular cross-linking of proteins. There is little direct chemical information from such techniques as nuclear magnetic resonance spectroscopy or mass spectrometry to detail the precise nature of these cross-links.5,6... 

Nuclear magnetic resonance spectroscopy for /V-acyloxy-/V-alkoxyamides 13C NMR spectroscopy, 56-58 15N NMR spectroscopy, 58-59 dynamic 1H NMR spectroscopy, 59 Nucleophilic substitution (SN2) reactions, /V-acyloxy-/V-alkoxyamidcs, 70-90 alcoholysis reactions, 89-90 with aromatic amines, HERON reactions, 70-74... 

Bob Ardrey obtained a first degree in Chemistry from the University of Surrey where he went on to obtain his doctorate studying the chemistry of trans-2,3-dichloro-l,4-dioxan and the stereochemistry of its reaction products using primarily mass spectrometry and nuclear magnetic resonance spectroscopy. He then carried out post-doctoral research at King s College, London, into the development of emitters for field-desorption mass spectrometry. 

T. Nakada, I.L. Kwee, C.B. Conboy, Noninvasive in vivo denonstratlon of 2-fluoro-2-deoxy-D-glucose metabolism beyond the hexokinase reaction In rat-brain by F-19 nuclear-magnetic-resonance spectroscopy. J. Neurochem. 46 (1986) 198. 

Hodson, J., The Estimation of the Photodegradation of Organic Compounds by Hydroxyl Radical Reaction Rate Constants Obtained from Nuclear Magnetic Resonance Spectroscopy Chemical Shift Data, Chemosphere, 17, 2339-2348 (1988). 

In this article we have considered some structural and energetic features of proteins that have been observed through physical techniques, particularly X-ray crystallography and nuclear magnetic resonance spectroscopy. We have not considered the details of the energetics of enzymic reactions, which are discussed in recent reviews,3-6 37 but have mentioned certain features related to structural observations. 

Hunger and Wang provide an account of advances in the characterization of solid catalysts in the functioning state by nuclear magnetic resonance spectroscopy. Examples include investigations of zeolite-catalyzed reactions with isotopic labels that allow characterization of transition states and reaction pathways as well as characterization of organic deposits, surface complexes, and reaction intermediates formed in catalyst pores. 

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