Temperature-dependent study of the kinetics of Os(a(5)D(4)) with N2O and O-2

被引：24

作者：

Campbell, ML

机构：

[1] Chemistry Department, United States Naval Academy, Annapolis

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1996年 / 100卷 / 50期

关键词：

D O I：

10.1021/jp962505a

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：

The gas-phase reactivity of Os(a(5)D(4)) with N2O and O-2 in the temperature range 373-623 K is reported. Osmium atoms were produced by the photodissociation of osmocene and detected by laser-induced fluorescence. The reaction rate constants of the ground a(5)D(4) state with N2O and O-2 are temperature-dependent. The bimolecular rate constants are described in Arrhenius form by k(N2O) = (5.8 +/- 1.4) x 10(-11) exp(-38.1 +/- 1.2 kJ/mol/RT) cm(3) s(-1) and k(O-2) = (2.7 +/- 0.4) x 10(-11) exp(-9.0 +/- 0.5 kJ/mol/RT) cm(3) s(-1) where the uncertainties are +/-2 sigma. The disappearance rates in the presence of both reactants are independent of buffer gas identity (Ar or N-2) and total pressure, indicating a bimolecular abstraction mechanism.

引用

页码：19430 / 19435

页数：6

共 58 条

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