Interconvertible molecular crystals 1 and 1 composed of 4-pyridyl-1,3-indanedione dimer 1 were selectively obtained. Thermal removal of solvent molecules in 1 afforded 1. Further dipping of 1 in a specific solvent reproduced 1. No crystallinity loss was observed even though both processes involved a drastic change of molecular packing arrangements.

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http://dx.doi.org/10.1039/d0cc03408hDOI Listing

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