Conformations of the triplet state of aromatic olefins. Observation of the transoid triplet states of 3,3-dimethyl-1-(2-naphthyl)-1-butene and 3,4-dihydrophenanthrene as a rigid planar triplet model

✍ Scribed by Tatsuo Arai; Hirochika Sakuragi; Katsumi Tokumaru; Yoshio Sakaguchi; Junko Nakamura; Hisaharu Hayashi

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 480 KB
• Volume: 98
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(83)80198-5

✦ Synopsis

Thr observed tripkt-tnplet absorptson of 3,3dirnetilqI-I-('-nrtphthvf)-1-butenc is assigned to the planar transoid geometr? {"I') from IX% spectr.d simiktrrr) 10 the ~.~d~~drophe~a~threne triplet, a rigid planar model. as wfI as from the mrsrured rzte constants for its qucnchmg by azulene and oxygen. The results are tn contrast with the t.2-diar)IcthyIene tnpkts ~htch favor the perpcndic&rly tnxlated +smetry (3P*).