Abstract
We propose that photocycloaddition reactions in molecular complexes in normal interstellar clouds will create unusually large molecules. These may be sufficiently radiation stable to be circulated with the interstellar gas, and so provide convenient nucleation centres for growth of loosely bound grains in dark regions.
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Millar, T.J., Williams, D.A. Large interstellar molecules. Astrophys Space Sci 48, 243–248 (1977). https://doi.org/10.1007/BF00648113
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DOI: https://doi.org/10.1007/BF00648113