The Four Isotopomer Reactions of NH(a) and ND(a) with NH3(X̃) and ND3(X̃)
| LEADER | caa a22 4500 | ||
|---|---|---|---|
| 001 | 378913662 | ||
| 003 | CHVBK | ||
| 005 | 20180305123548.0 | ||
| 007 | cr unu---uuuuu | ||
| 008 | 161128e20040401xx s 000 0 eng | ||
| 024 | 7 | 0 | |a 10.1524/zpch.218.4.439.29201 |2 doi |
| 035 | |a (NATIONALLICENCE)gruyter-10.1524/zpch.218.4.439.29201 | ||
| 245 | 0 | 4 | |a The Four Isotopomer Reactions of NH(a) and ND(a) with NH3(X̃) and ND3(X̃) |h [Elektronische Daten] |c [L. Adam, W. Hack, Matthias Olzmann] |
| 520 | 3 | |a The reactions NH(a) + NH3(X̃) → products (1) ND(a) + NH3(X̃) → products (2) NH(a) + ND3(X̃) → products (3) ND(a) + ND3(X̃) → products (4) were studied in a quasi-static reaction cell at room temperature and pressures of 10 and 20mbar with He as the main carrier gas. The electronically excited reactants NH(a) and ND(a) were generated by laser-flash photolysis of HN3 and DN3, respectively, at λ = 308nm and detected by laser-induced fluorescence (LIF). Also the ground state species NH(X) and ND(X) as products were detected by LIF. From the measured concentration-time profiles of NH(a) and ND(a) under pseudo-first order conditions, the following rate constants were obtained: NH(a) + NH3(X̃) → products (1) ND(a) + NH3(X̃) → products (2) NH(a) + ND3(X̃) → products (3) ND(a) + ND3(X̃) → products (4) k1 = (9.1 ± 0.9) × 1013 cm3mol−1s−1 k2 = (9.6 ± 1.0) × 1013 cm3mol−1s−1 k3 = (8.0 ± 1.0) × 1013 cm3mol−1s−1 k4 = (7.2 ± 0.8) × 1013 cm3mol−1s−1. The major products are the corresponding NHiD2 − i(X̃) radicals (i = 0, 1, 2), whereas quenching processes such as NH(a) + ND3 → NH(X) + ND3 are of minor importance (1%). The isotope exchange NH(a) + ND3 → ND(X) + NHD2 is negligible, and the corresponding channel on the singlet surface NH(a) + ND3(X~) → ND(a) + NHD2(X̃) contributes with 1% to the overall NH(a) depletion in that reaction. The experimental findings are discussed in terms of a chemical activation mechanism by means of statistical rate theory. | |
| 540 | |a © 2004 Oldenbourg Wissenschaftsverlag GmbH | ||
| 690 | 7 | |a Thermodynamics & statistical physics |2 nationallicence | |
| 690 | 7 | |a Laboratory techniques, experiments |2 nationallicence | |
| 690 | 7 | |a Physical chemistry |2 nationallicence | |
| 700 | 1 | |a Adam |D L. |4 aut | |
| 700 | 1 | |a Hack |D W. |4 aut | |
| 700 | 1 | |a Olzmann |D Matthias |4 aut | |
| 773 | 0 | |t Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics |d Oldenbourg Wissenschaftsverlag GmbH |g 218/4/2004(2004-04-01), 439-456 |x 0942-9352 |q 218:4/2004<439 |1 2004 |2 218 |o zpch | |
| 856 | 4 | 0 | |u https://doi.org/10.1524/zpch.218.4.439.29201 |q text/html |z Onlinezugriff via DOI |
| 908 | |D 1 |a research article |2 jats | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1524/zpch.218.4.439.29201 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Adam |D L. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Hack |D W. |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Olzmann |D Matthias |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics |d Oldenbourg Wissenschaftsverlag GmbH |g 218/4/2004(2004-04-01), 439-456 |x 0942-9352 |q 218:4/2004<439 |1 2004 |2 218 |o zpch | ||
| 900 | 7 | |b CC0 |u http://creativecommons.org/publicdomain/zero/1.0 |2 nationallicence | |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-gruyter | ||