We present the detection of two H2C3O isomers, propynal and cyclopropenone, toward various starless cores and molecular clouds, together with upper limits for the third isomer propadienone. We review the processes controlling the abundances of H2C3O isomers in interstellar media showing that the reactions involved are gas-phase ones. We show that the abundances of these species are controlled by kinetic rather than thermodynamic effects.
@article{arxiv.1512.01582,
title = {The interstellar chemistry of H2C3O isomers},
author = {Jean-Christophe Loison and Marcelino Agúndez and Núria Marcelino and Valentine Wakelam and Kevin M. Hickson and José Cernicharo and Maryvonne Gerin and Evelyne Roueff and Michel Guélin},
journal= {arXiv preprint arXiv:1512.01582},
year = {2016}
}