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Chemistry Letters
Vol. 42 (2013) No. 12 P 1499-1501




The title cyclic compounds, synthesized by cross-coupling reactions, have nonplanar frameworks, as revealed by X-ray analysis and DFT calculations. The barrier to exchange between the nonplanar structures of the mesityl derivative was determined to be 34 kJ mol−1 by a dynamic NMR method.

Copyright © 2013 The Chemical Society of Japan

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