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Crystal structure and spectroscopic study of 6a,7a,13b,13c-tetrahydro-6a-hydroxy-2,3,11,12-tetramethoxy-6,6,8,8-tetramethyl-6H,8H-bischromeno-[3,4-b:4′,3′-d]furan, a dimer of precocene II 3,4-epoxide

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Abstract

The X-ray crystal structure of the title compound has been determined. The crystals are orthorhombic:Pcab, a=9.857(5),b=15.274(5),c=32.601(14) Å,V c =4908.4 Å3;Z=8;D x =1.279 Mg m−3; λ(MoKα)=0.71069 Å;μ=0.88 cm−1,F(000)=2016, temperature of measurement 294 K. The structure was solved by direct methods, and refined with 932 reflections to a finalR value of 0.071. The two six-membered rings show distorted boat conformations and the tetrahydrofuran ring exhibits a half-chair conformation. Mass spectra, IR spectrum, and1H and13C NMR spectra are also reported.

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Authors and Affiliations

  1. Instituto de Química Bio-Orgánica (C.S.I.C.), J. Girona Salgado, 18-26, 08034, Barcelona, Spain

    F. Camps, J. Coll, A. Conchillo & A. Messeguer

  2. Instituto “Jaime Almera” (C.S.I.C.), c. Martí Franqués, s/n Apto. 30.102, 08034, Barcelona, Spain

    E. Molins & C. Miravitlles

Authors
  1. F. Camps
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  2. J. Coll
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  3. A. Conchillo
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  4. A. Messeguer
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  5. E. Molins
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  6. C. Miravitlles
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Camps, F., Coll, J., Conchillo, A. et al. Crystal structure and spectroscopic study of 6a,7a,13b,13c-tetrahydro-6a-hydroxy-2,3,11,12-tetramethoxy-6,6,8,8-tetramethyl-6H,8H-bischromeno-[3,4-b:4′,3′-d]furan, a dimer of precocene II 3,4-epoxide. Journal of Crystallographic and Spectroscopic Research 15, 483–492 (1985). https://doi.org/10.1007/BF01171051

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  • DOI: https://doi.org/10.1007/BF01171051

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