Structural effects on the solid-state photodimerization of 5-chloro and 5-nitro-2(1<Emphasis Type="Italic">H</Emphasis>)-pyridone in molecular compounds |
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Authors: | Thekku Veedu Sreevidya Gilad Golden Noam Saper Jared Feldman Mark Botoshansky Menahem Kaftory |
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Institution: | (1) Schulich Faculty of Chemistry, Technion, Israel Institute of Technology, 32000 Haifa, Israel; |
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Abstract: | Abstract The preparation and crystal structure of six molecular compounds consist of light-stable host molecules (1-cyclohexyl-4-hydroxybenzene,
1,1,6,6-tetraphenyl-2,4-hexadiyne-1,6-diol, 4-((10-4-(ethoxycarbonyl)phenoxy]decyl)oxy)benzene, 1,2,4,5-benzenetetracarboxylic
acid, resorcinol] and light-sensitive guest molecules (5-chloro-2(1H)-pyridone or 5-nitro-2(1H)-pyridone] are described in light of their failure to undergo 4 + 4] photodimerization in the solid-state upon irradiation
with UV light. Unlike in many cases were pyridone and its derivatives undergo such dimerization in the solid-state due to
the packing arrangement in the crystalline form in which the geometric requirement for photodimerization meet, the compounds
described here failed to pack in ways to enable such photodimerization. The distances between the potentially reactive atoms
ranged from 4.620 to 8.408 ? which are too long to react. |
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