4462-95-7Relevant articles and documents
The photodimerisation of the α- and β-forms of trans-cinnamic acid: A study of single crystals by vibrational microspectroscopy
Atkinson, Samantha D.M.,Almond, Matthew J.,Hollins, Peter,Jenkins, Samantha L.
, p. 629 - 635 (2003)
Infrared and Raman microspectroscopy have been used to follow the photodimerisation reactions of single crystals, the α- and β-forms of trans-cinnamic acid. This approach allows the starting materials and products - α-truxillic acid that has Ci symmetry and β-truxinic acid, which has Cs symmetry - to be identified. It also allows the topotactic nature of the reaction to be confirmed. Attempts to produce the poorly-defined unreactive γ-form of trans-cinnamic acid resulted only in a mixture of the α- and β-forms. The findings suggest a wide role for these spectroscopic methods in monitoring solid-state organic reactions.
Competitive isomerization and dimerization in co-crystals of 1,1,6,6-tetraphenyl-2,4-hexadiyne-1,6-diol and sorbic acid: A new look at stereochemical requirements for [2+2] dimerization
Zheng, Shao-Liang,Pham, Oanh,Vande Velde, Christophe M. L.,Gembicky, Milan,Coppens, Philip
, p. 2538 - 2540 (2008)
Competitive [2+2] photodimerization and E→Z isomerization reactions occur in a co-crystal of 1,1,6,6-tetraphenyl-2,4-hexadiyne-1,6-diol upon irradiation with 325 nm light. At 90 K both reactions are observed, whereas at 280 K the dimerization reaction is very fast and inhibits isomerization as the nature of the chromophore is affected by the reaction. The temperature dependence of the stereospecificity of the dimerization reaction is related to the large sliding motion required to bring the reacting molecules into juxtaposition. The progress of the reactions has been monitored by photocrystallographic methods. The Royal Society of Chemistry.
Alkaloids of Adenocarpus mannii Hooker, a leguminose of Kilimanjaro. 20. Leguminosesalkaloids
Bernasconi,Steinegger
, p. 42 - 51 (2007/10/04)
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