Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5277573 | Tetrahedron Letters | 2006 | 5 Pages |
Abstract
The crystal structures of 1,3-bis(4-bromophenyl)- and 1,3-di(2-thienyl)azulenes (5 and 6) were elucidated by X-ray analysis. Two aryl groups connect to the azulenyl core with dihedral angles of 34.9-41.6° and the two aryl planes of the groups slant against the azulene ring toward different ways in their crystal structures. It was also found that the azulene rings of 5 and 6 showed a slight out-of-plane deformation in the way that the hydrogen atoms at the 4- and 8-positions are apart from the neighboring aryl ortho-hydrogen atoms to fill in the vacant space made by the slanting aryl planes.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Akira Ohta, Nguyen Chung Thanh, Kouhei Terasawa, Kunihide Fujimori, Shigeyasu Kuroda, Mitsunori Oda,