Relaxation of vibrationally excited HF in levels v=1 and v=2. II. By CH4, C2H6, C3H8, C2H2, and C2H4

The rate constants for the vibrational deactivation of HF(v = 1,2) by CH₄, C₂H₆, C₃H₈, and C₂H₂ were measured by monitoring the decay of ${\mathrm{HF}}^{†}$ rotation‐vibration emission in a fast flow system. For these hydrocarbons the energy transfer processes are very efficient. In the case of C₂H₄ the rate constant could only be estimated.