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X-ray determination of the structure and conformation of an oxide from helenalin

Publication ,  Journal Article
McPhail, AT; Onan, KD; Gross, PM
Published in: Journal of the Chemical Society, Perkin Transactions 2
January 1, 1975

The crystal and molecular structure of the oxide (II) produced by the reaction of helenalin (I) with hydrogen chloride-chloroform and deactivated neutral alumina has been established by X-ray analysis from photographic data. Crystals are orthorhombic, space group P212121, with a = 8.57(1), b = 15.79(2), c = 9.95(1) Å, Z = 4. The structure was solved by direct phase-determining methods and the molecular parameters refined by full-matrix least-squares calculations to R 0.117 over 1303 independent observed reflections. The cycloheptane ring adopts a conformation intermediate between the twist-chair and chair forms.

Duke Scholars

Published In

Journal of the Chemical Society, Perkin Transactions 2

DOI

ISSN

1472-779X

Publication Date

January 1, 1975

Issue

5

Start / End Page

496 / 500

Related Subject Headings

  • Organic Chemistry
 

Citation

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McPhail, A. T., Onan, K. D., & Gross, P. M. (1975). X-ray determination of the structure and conformation of an oxide from helenalin. Journal of the Chemical Society, Perkin Transactions 2, (5), 496–500. https://doi.org/10.1039/P29750000496
McPhail, A. T., K. D. Onan, and P. M. Gross. “X-ray determination of the structure and conformation of an oxide from helenalin.” Journal of the Chemical Society, Perkin Transactions 2, no. 5 (January 1, 1975): 496–500. https://doi.org/10.1039/P29750000496.
McPhail AT, Onan KD, Gross PM. X-ray determination of the structure and conformation of an oxide from helenalin. Journal of the Chemical Society, Perkin Transactions 2. 1975 Jan 1;(5):496–500.
McPhail, A. T., et al. “X-ray determination of the structure and conformation of an oxide from helenalin.” Journal of the Chemical Society, Perkin Transactions 2, no. 5, Jan. 1975, pp. 496–500. Scopus, doi:10.1039/P29750000496.
McPhail AT, Onan KD, Gross PM. X-ray determination of the structure and conformation of an oxide from helenalin. Journal of the Chemical Society, Perkin Transactions 2. 1975 Jan 1;(5):496–500.

Published In

Journal of the Chemical Society, Perkin Transactions 2

DOI

ISSN

1472-779X

Publication Date

January 1, 1975

Issue

5

Start / End Page

496 / 500

Related Subject Headings

  • Organic Chemistry