Structures, Dynamic Behavior, and Spectroscopic Properties of 1,8-Anthrylene–Ethenylene Cyclic Dimers and Their Substituent Effects
Cyclic compounds consisting of two 1,8-anthrylene units and two ethenylene linkers were studied as π-conjugated compounds. Three derivatives having substituents (H, Me, and Ph) at the linker moieties were synthesized by Suzuki–Miyaura coupling of the corresponding diethenylanthracene boronic esters...
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Published in | Bulletin of the Chemical Society of Japan Vol. 88; no. 11; pp. 1591 - 1602 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
OXFORD
The Chemical Society of Japan
15.11.2015
Oxford Univ Press Chemical Society of Japan |
Subjects | |
Online Access | Get full text |
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Summary: | Cyclic compounds consisting of two 1,8-anthrylene units and two ethenylene linkers were studied as π-conjugated compounds. Three derivatives having substituents (H, Me, and Ph) at the linker moieties were synthesized by Suzuki–Miyaura coupling of the corresponding diethenylanthracene boronic esters with 1,8-diiodo-10-mesitylanthracene. The X-ray analysis and DFT calculations revealed that all the compounds had nonplanar cyclic frameworks where the two ethenylene linkers were syn to the anthracene units. Exchanges between the two syn forms were observed from the line shape changes in the 1H NMR signals of the mesityl group. Their barriers increased in the order of H, Ph, and Me compounds from 34 to 70 kJ mol−1. The effects of substituents on the molecular structure, dynamic behavior, and electronic properties are discussed. |
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Bibliography: | KAKEN ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0009-2673 1348-0634 |
DOI: | 10.1246/bcsj.20150245 |