@article {6889, title = {QUANTUM PHENOMENA AND SOLVENT EFFECTS ON ADDITION OF HYDROGEN ISOTOPES TO BENZENE AND TO DIMETHYLBUTADIENE}, journal = {Berichte Der Bunsen-Gesellschaft-Physical Chemistry Chemical Physics}, volume = {94}, number = {11}, year = {1990}, note = {ISI Document Delivery No.: EU906Times Cited: 18Cited Reference Count: 4189TH GENERAL ASSEMBLY OF THE DEUTSCHE-BUNSEN-GESELLSCHAFT-FUR-PHYSIKALISCHE-CHEMIE ( ON THE 65TH BIRTHDAY OF THEODOR ACKERMANN ) : CHEMICAL ELEMENTAL REACTIONSMAY 24-26, 1990TUBINGEN, FED REP GERDEUT BUNSEN GESELL PHYS CHEM}, month = {Nov}, pages = {1224-1230}, type = {Proceedings Paper}, abstract = {Rate constants have been measured for the reaction of the light hydrogen isotope muonium with benzene and 2,3-dimethylbutadiene-1,3 in the gas phase and in several solvents. Comparison with H atom data reveals (1) appreciable kinetic isotope effects, (2) a strong contribution of tunnelling for the activated reaction with benzene, (3) encounter controlled reaction for Mu addition to the diene, (4) a mass dependence of the diffusion constant of hydrogen isotopes in solution, and (5) an enhancement of the rate constant in solution over that in the gas phase by a factor, except for water, of the inverse Ostwald solubility coefficient for hydrogen. The isotope-dependent reduction of the solvent effect in water is tentatively ascribed to the dynamics of the clathrate-like structure when the hydrogen atom reacts.}, keywords = {ATOM, DIFFUSION, electron, ELEMENTARY REACTIONS, GASES, ISOTOPE EFFECTS, KINETICS, LIQUIDS, muonium, radicals, RATE CONSTANTS, solutions, WATER}, isbn = {0005-9021}, url = {://A1990EU90600008}, author = {Roduner, E. and Louwrier, P. W. F. and Brinkman, G. A. and Garner, D. M. and Reid, I. D. and Arseneau, D. J. and Senba, M. and Fleming, Donald G.} }