Studies in crystal engineering. Photochemical and crystallographic investigations of bromocoumarins and (±)-7-(p-bromobenzylidene)piperitone
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 7,p. 981-987
- https://doi.org/10.1039/p29910000981
Abstract
Photodimerisations of bromo-substituted coumarins 1 and 2 and (±)-7-(bromobenzylidene)piperitone 3 have been investigated in the solid state. 6-Bromocoumarin and 7-bromocoumarin crystals yield syn head-to-head dimers upon irradiation, whereas 3 is photostable. The photobehaviour of these systems is rationalised in terms of their crystal packing. The β steering ability of the bromo group has been examined for crystal engineering and the effect of the topological features of the organic moiety on the molecular packing is emphasised.Keywords
This publication has 32 references indexed in Scilit:
- Structure of 6-acetoxycoumarin: topochemical photodimerization and analysis of acetoxy.acetoxy interactions in the solid stateActa Crystallographica Section C Crystal Structure Communications, 1988
- Photochemical reactions of organic crystalsChemical Reviews, 1987
- Crystal engineering through non-bonded contacts to sulphurTetrahedron, 1987
- A study on the photochemical dimerization of coumarins in the solid stateThe Journal of Organic Chemistry, 1985
- A study in Crystal engineering: Solid-state photodimerization of chloro- and methyl-coumarinsChemical Physics Letters, 1984
- Topochemical photodimerization of 7-acetoxycoumarin: the acetoxy group as a steering agentCanadian Journal of Chemistry, 1982
- Crystal engineering of photodimerizable cyclopentanones. Comparison of chloro- and methyl- substitution as solid-state steering groupsThe Journal of Physical Chemistry, 1981
- 383. Topochemistry. Part I. A surveyJournal of the Chemical Society, 1964
- 385. Topochemistry. Part III. The crystal chemistry of some trans-cinnamic acidsJournal of the Chemical Society, 1964
- 384. Topochemistry. Part II. The photochemistry of trans-cinnamic acidsJournal of the Chemical Society, 1964