Correlated rotation in bis (9-triptycyl) methanes and bis (9-triptycyl) ethers. Separation and interconversion of the phase isomers of labeled bevel gears

Y Kawada, H Iwamura

Index: Kawada,Y.; Iwamura,H. Journal of the American Chemical Society, 1983 , vol. 105, p. 1449

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Citation Number: 47

Abstract

Abstract: Several bis (9-triptycy1) methanes and bis (9-triptycyl) ethers have been prepared by the addition of benzynes to bis (9-anthry1) methane and by the thermolysis of 9-triptycyl9- triptyceneperoxycarboxylates, respectively. The internal rotation in these bevel-gear-shaped molecules was found to be very rapid on the NMR time scale in solution, while the I3C NMR spectra of the ether taken by the CPMAS technique showed the splitting of the bridgehead ...