Infrared photodissociation of hydrogen-bonded clusters: C2H4⋅HF and C2H4⋅HCl

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Abstract
Infrared photodissociation spectra of C2H4⋅HF, C2H4⋅HC1, and C2H4⋅NO formed in molecular beams are reported. Parameters determined are absorption frequencies ω0, initial‐state lifetimes τ, and transition moments 〈μ〉2: All are blue shifted relative to the 949 cm−1 monomer ν7 absorption frequency. While the frequency for C2H4⋅HF is close to that observed in an Ar matrix, the frequency for C2H4⋅HC1 is shifted 6.8 cm−1 further than that observed in a matrix. The results are discussed in terms of the bonding interaction and the photodissociation mechanism.