Centrohexaindanes bearing methyl groups in their molecular propellane cavities

Kuck D, Hackfort T, Neumann B, Stammler H-G (2007)
Polish Journal of Chemistry 38(44): 875-892.

Journal Article | Published | English

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Abstract
The syntheses of two new centrohexaindane derivatives bearing methyl groups in their molecular propellane-type cavities are described. These new topologically non-planar hydrocarbons, 1,8-dimethylcentrohexaindane 6 and 1,4,8,28-tetramethylcentrohexaindane 7 were obtained from suitable 1,3-indanediones following the shortest aufbau strategy, the propellane route, representing a six-step access to these unusually highly condensed polycyclic hydrocarbons. X-ray single crystal structure analysis of 6 revealed that the presence of the two methyl groups in the cavities of the centrohexaindane framework does not give rise to significant distortion of the Td-symmetrical molecular skeleton; however, their efficient hiding within two of the four equivalent cavities allows for strong intermolecular disorder in the crystal.
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Kuck D, Hackfort T, Neumann B, Stammler H-G. Centrohexaindanes bearing methyl groups in their molecular propellane cavities. Polish Journal of Chemistry. 2007;38(44):875-892.
Kuck, D., Hackfort, T., Neumann, B., & Stammler, H. - G. (2007). Centrohexaindanes bearing methyl groups in their molecular propellane cavities. Polish Journal of Chemistry, 38(44), 875-892.
Kuck, D., Hackfort, T., Neumann, B., and Stammler, H. - G. (2007). Centrohexaindanes bearing methyl groups in their molecular propellane cavities. Polish Journal of Chemistry 38, 875-892.
Kuck, D., et al., 2007. Centrohexaindanes bearing methyl groups in their molecular propellane cavities. Polish Journal of Chemistry, 38(44), p 875-892.
D. Kuck, et al., “Centrohexaindanes bearing methyl groups in their molecular propellane cavities”, Polish Journal of Chemistry, vol. 38, 2007, pp. 875-892.
Kuck, D., Hackfort, T., Neumann, B., Stammler, H.-G.: Centrohexaindanes bearing methyl groups in their molecular propellane cavities. Polish Journal of Chemistry. 38, 875-892 (2007).
Kuck, Dietmar, Hackfort, T., Neumann, Beate, and Stammler, Hans-Georg. “Centrohexaindanes bearing methyl groups in their molecular propellane cavities”. Polish Journal of Chemistry 38.44 (2007): 875-892.
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