Vibrational relaxation of highly excited diatomics. II. HCl(v⩽7)+20 quenchers
120 vibrational relaxation rate constants kv,v−1Q are measured at 298 K for HCl (v⩽7) collisions with six diatomics: N2, CO, NO, HCl, DCl, and HF; three triatomics: CO2, N2O, NO2; and eleven polyatomics: CH4, C2H6, C3H8, iso-C4H10, CH3Cl, CH3F, CF4, SF6, CF3Cl, CF2Cl2, and CFCl3. For most quenchers,...
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Veröffentlicht in: | The Journal of chemical physics 1982-03, Vol.76 (6), p.2984-2992 |
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Hauptverfasser: | , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | 120 vibrational relaxation rate constants kv,v−1Q are measured at 298 K for HCl (v⩽7) collisions with six diatomics: N2, CO, NO, HCl, DCl, and HF; three triatomics: CO2, N2O, NO2; and eleven polyatomics: CH4, C2H6, C3H8, iso-C4H10, CH3Cl, CH3F, CF4, SF6, CF3Cl, CF2Cl2, and CFCl3. For most quenchers, kQ increases with increasing v independent of whether the vibrational energy gap is reduced or increased. Large collisional relaxation probabilities for high v, of order 0.1 to 1 gas kinetic, are encountered for 11 of 20 quenchers. For Q=HC1 (v=0), the relaxation is shown experimentally to be mainly V–R,T for high v. The rates reflect a mix of effects due to dipole and dispersion interactions, energy gap, rotation, and complex formation, and present interesting problems of interpretation. |
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ISSN: | 0021-9606 1089-7690 |
DOI: | 10.1063/1.443338 |