## Abstract Cyanoโsubstituted methyl radicals (cyanomethylโhand 2โcyanoโ2โpropyl radicals) and __syn__โand __anti__โ1โcyanoโallyl radicals were generated, and their recombination kinetics in solution were investigated between โ50 and +50ยฐC by timeโresolved electronโspinโresonance spectroscopy. The
Bimolecular rate constants for reactions of muonium in aqueous solutions
โ Scribed by Paul W. Percival; Emil Roduner; Hanns Fischer; Mario Camani; Fredy N. Gygax; Alexander Schenck
- Publisher
- Elsevier Science
- Year
- 1977
- Tongue
- English
- Weight
- 330 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Rate constants have been obtained from the rates of disappearance of the muonium precession signal in aqueous solutions of KMnOa,NaNOa, NaOH, NaCI, HCl, HC104, maleic acid and ethanol. They disqrce with the results of urtier, indirect determinations. Comparison with the rate constants for hydrogen atoms reveals large kinetic isotope effect%
๐ SIMILAR VOLUMES
The intemction bttwxn Mu and 02 in \intcr. \bhich could be a spin-conrcrsion procc>s. !ms A r.uc constant of(2\_-l = 03 X lO\*O .\l-\* s-' and is compared xsiith the diffusion-controlled hmit and the corresponding g&s ph.~sc rwction\_
Rate constants have been measured by pulse radiolysis for the reactions of the NO, radical with five cyclic ethers and a series of alcohols. Rate constants ranged from 3.5 x lo4 M-' 5 -l for deuterated methanol to 1.1 x lo7 M-' 5-l for tetrahydrofuran. The rate constants for the reactions of NO3 wit
The kinetics of the acqueous-phase reactions of the free radicals .OH, .Cl,, and SO; . with the halogenated acetates, CHzFCOO-, CHF2COO-, CF3COO-, and with CHzClC00-, CHClzC00-, CC13COOwere investigated. Generally, the reactivity decreases with increasing halogen substitution and is in the order k(.
Bimolecular QRRK (Quantum Rice-Ramsperger-Kassel) analysis is a simple method for calculating rate constants of addition and recombination reactions, based on unimolecular quantum-RRK theory. Input parameters are readily derived, and rate constants and reaction branching can be predicted with remark