Rotational Isomerism Involving an Acetylenic Carbon VII. Restricted Rotation about Acetylenic Axis in a Diphenylethyne Derivative with Sterically Crowded <i>m</i>-Terphenyl Moieties
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- Shinji Toyota
- Department of Chemistry, Faculty of Science, Okayama University of Science
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- Takashi Yanagihara
- Department of Chemistry, Faculty of Science, Okayama University of Science
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- Yukihiro Yoshida
- Department of Chemistry, Faculty of Science, Okayama University of Science
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- Michio Goichi
- Department of Chemistry, Faculty of Science, Okayama University of Science
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<jats:title>Abstract</jats:title> <jats:p>Bis(2,4,4″,6-tetramethyl-1,1′:3′,1″-terphenyl-2′-yl)ethyne was prepared by the Hart reaction and the Stille coupling as a sterically crowded diphenylethyne derivative. The barrier to rotation about the acetylenic axis was determined by the dynamic NMR method to be 51 kJ mol−1. The restricted rotation is attributed to the steric hindrance of the two mesityl groups in the m-terphenyl moieties.</jats:p>
収録刊行物
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- Bulletin of the Chemical Society of Japan
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Bulletin of the Chemical Society of Japan 78 (7), 1351-1353, 2005-07-01
Oxford University Press (OUP)
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詳細情報 詳細情報について
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- CRID
- 1360002219105036288
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- NII論文ID
- 130004151918
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- ISSN
- 13480634
- 00092673
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