STATE-SPECIFIC REACTIONS OF FE+(A(6)D,A(4)F) WITH D2O AND REACTIONS OF FEO+ WITH D-2

被引:196
作者
CLEMMER, DE [1 ]
CHEN, YM [1 ]
KHAN, FA [1 ]
ARMENTROUT, PB [1 ]
机构
[1] UNIV UTAH, DEPT CHEM, SALT LAKE CITY, UT 84112 USA
关键词
D O I
10.1021/j100077a017
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Reactions of Fe+ with D2O and FeO+ with D-2 are studied as a function of translational energy in a guided-ion beam tandem mass spectrometer. In the former system, the only products observed from single-collision events are FeD+ and FeOD+. These products are formed in endothermic reactions. At low energies, the FeOD2+ adduct is also observed, a result of secondary stabilizing collisions with D2O. Results for Fe+ produced in two different sources are analyzed to yield state-specific cross sections for reaction of the a(6)D ground and a(4)F first excited states of Fe+. In the reaction of FeO+ with D-2, three ionic products (Fe+, FeD+ and FeOD+) are observed. An inefficient exothermic process that forms Fe+ + D2O is observed, consistent with known thermochemistry; however, formation of Fe+ + D2O also occurs via another more efficient pathway that involves a reaction barrier of similar to 0.6 eV. The FeOD+ channel also proceeds via a pathway involving a reaction barrier of the same energy. Results for both the Fe+ + D2O and FeO+ + D-2 systems are used to derive potential energy surfaces for these systems.
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页码:6522 / 6529
页数:8
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