The kinetics of the reaction F+H-2->HF+H. A critical review of literature data

Published experimental studies concerning the determination of rate constants for the reaction F+H-2-->HF+H are reviewed critically and conclusions are presented as to the mos accurate results available. Based on these results, the recommended arrhenius expression for the temperature range 190-376 K is k(F+H2)=(1.1+/-0.1)x10(-10) exp[-(450+/-50)/T] cm(3) molecule(-1) s(-1), and the recommended value for the rate constant at 298 K is k(F+H2)=(2.43+/-0.15)x10(-11) cm(-3) molecule(-1) s(-1). The recommended Arrhenius expression for the reaction F+D-2-->DF+D, for the same temperature range, based on the recommended expression for k(F+H), and accurate results for the kinetic isotope effect k(F+H2)/k(F+D2) is k(F+D2)=(1.06+/-0.12x10(-10) exp [-(635+/-55)/T]cm(3) molecule(-1) s(-1), and the recommended value for 298 K is k(F+D2)=(1.25+/-0.10)x10(-11) cm(3) molecule(-1) s(-1). (C) 1997 John Wiley & Sons, Inc.