Technical Comments

Comment on “Single-Crystal X-ray Structure of 1,3-Dimethylcyclobutadiene by Confinement in a Crystalline Matrix”

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Science  19 Nov 2010:
Vol. 330, Issue 6007, pp. 1047
DOI: 10.1126/science.1196188
  • Scheme 1

    Photochemical preparation of CBD derivatives from α-pyrone.

  • Fig. 1

    Geometries of square (Me2CDBS) and rectangular-bent (Me2CBDR) dimethylcyclobutadiene from (12).

  • Fig. 2

    Two components of crystallographic disorder of the guest molecule in the crystal structure of Me2CBD (top) and theoretically calculated and experimentally suggested structure of the purported bicyclic intermediate (bottom). The bond lengths in Me2CBDS (top left) are very similar to those predicted theoretically for the Dewar intermediate (bottom left).

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  • Comment on "Single-Crystal X-ray Structure of 1,3-Dimethylcyclobutadiene by Confinement in a Crystalline Matrix"
    Igor V. Alabugin, Brian Gold, Michael Shatruk, Kirill Kovnir

    Supporting Online Material

    This supplement contains:
    SOM Text
    Table S1

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