Chemical Reactions of NCl(a-1 Delta): Generation and Removal
Abstract
The Cl + N3 reaction was used to provide a source of NCl(a-1 Delta) molecules in a room temperature flow reactor. The total quenching rate constants were measured for 40 molecular reagent species and for F, N, O and H atoms. In most cases, rate constants were obtained for both NF(a-1 Delta) and NCl(a-1 Delta) so that the data could be confirmed by comparison with earlier studies of NF(a-1 Delta)). The quenching rate constants for NCl(a-1 Delta) range from ^1 x 10(exp -15) to 4 x 10(exp -11)cu cm molecule/s. Except for H, F, O, CH3Cl, HBr, HCl and HI, the rate constants for the NCl(a-1 Delta) molecule are generally smaller than or comparable to those for NF(a-1 Delta), and NCl(a-1 Delata) is not especially reactive at 300 K. Small rate constants were obtained for common gases, such as H2, CO2 and CH4; the rate constants are larger for unsaturated hydrocarbons and they increase with the number of carbon atoms in the molecule. A correlation was found between the basicity of a series of amines and the magnitudes of quenching rate constants of NF(a-1 Delta) and NCl(a-1 Delta); the rate constants for NCl(a) were smaller than for NF(a) indicating a less acidic nature for NCl(a-1 Delta).
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 08, 2000
- Accession Number
- ADA383720
Entities
People
- D. W. Setser
Organizations
- Kansas State University