59000-00-9Relevant articles and documents
Thermal energy reactions of CO2+ with chloromethanes
Tsuji, Masaharu,Funatsu, Tsuyoshi,Matsumura, Ken-ichi,Nishimura, Yukio
, p. 4526 - 4532 (1993)
Rate constants and product ions have been determined for thermal energy reactions of CO2+ with CHnCl4-n (n = 0-3) by using an ion-beam apparatus.Total rate constants are (8.7+/-3.7), (6.7+/-3.1), (9.1+/-4.1), and (4.9+/-1.6)x10-10 cm3 s-1 for CH3Cl, CH2Cl2, CHCl3, and CCl4, respectively.These values amount to 38percent-61percent of the collision rate constants estimated from either the Langevin or averaged dipole oriented theory.Although charge transfer followed by the successive loss of a Cl atom is the major product channel, parent ions are formed from CH3Cl and CH2Cl2 with branching ratios of 33percent+/-5percent and 25percent+/-3percent, respectively.The reaction mechanisms are interpreted in terms of the electronic states of the parent molecular ion accessible in the charge-transfer processes.The lack of formation of parent ions from CHCl3 and CCl4 is explained as due to complete (pre)dissociation of ionic states below 13.78 eV.
