TY - JOUR
T1 - A selected ion flow tube investigation of the positive ion chemistry of a number of bromine containing fully and partially halogenated hydrocarbons
AU - Mayhew, Christopher
AU - Thomas, R
AU - Watts, P
PY - 2003/1/1
Y1 - 2003/1/1
N2 - In this paper we report the reactions of OH- with the halogenated methanes CCl4, CCl3F, CCl2F2, CCIF3, CF4, CHCl3, CHCl2F, CHClF2, CHF3. CH2Cl2, CH2CIF. CH2F2, CH3Cl, and CH3F in a 0.5 Torr helium buffer gas at 300 K using a selected ion flow tube. Reaction rate coefficients were measured and branching ratios determined for the large number of reactions studied. The results are discussed in terms of the thermochemistry of the reactions and barriers that exist to different reaction pathways. It is demonstrated that there is no barrier to proton and Cl+ abstraction. while significant barriers exist for nucleophilic substitution. (C) 2004 Elsevier B.V. All rights reserved.
AB - In this paper we report the reactions of OH- with the halogenated methanes CCl4, CCl3F, CCl2F2, CCIF3, CF4, CHCl3, CHCl2F, CHClF2, CHF3. CH2Cl2, CH2CIF. CH2F2, CH3Cl, and CH3F in a 0.5 Torr helium buffer gas at 300 K using a selected ion flow tube. Reaction rate coefficients were measured and branching ratios determined for the large number of reactions studied. The results are discussed in terms of the thermochemistry of the reactions and barriers that exist to different reaction pathways. It is demonstrated that there is no barrier to proton and Cl+ abstraction. while significant barriers exist for nucleophilic substitution. (C) 2004 Elsevier B.V. All rights reserved.
KW - ion-molecule reactions
KW - nucleophilic substitution
KW - halogenated methanes
UR - http://www.scopus.com/inward/record.url?scp=0037437693&partnerID=8YFLogxK
U2 - 10.1016/S1387-3806(02)00783-2
DO - 10.1016/S1387-3806(02)00783-2
M3 - Article
VL - 223-224
SP - 91
EP - 106
JO - International Journal of Mass Spectrometry
JF - International Journal of Mass Spectrometry
ER -