Motivated by the recent discovery of gas-phase interstellar vinyl alcohol, CH 2 =CH(OH), we present laboratory experiments on this molecule's solid-phase formation. Through a combination of reaction chemistry, infrared spectroscopy, isotopic substitution, thermal annealings, and independent syntheses, we have identified vinyl alcohol in proton-irradiated H 2 O + C 2 H 2 ices and have measured its column density at ~15 K. UV photolysis of H 2 O + C 2 H 2 ices at ~15 K also produces vinyl alcohol. It is suggested that vinyl alcohol is formed in interstellar ices and then ejected into the gas phase, where it might undergo additional reactions.
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Hudson et al. (2003) studied this question.
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