anti-Tetramantane, a C22H28 hydrocarbon having the regular topology of the diamondoid lattice, has been synthesised by a double homologation of diamantane, the key step involving a ring expansion–cyclisation reaction of a polycyclic diene in hydrogen in the gas phase on a platinum-silica catalyst; the structure has been established by an X-ray crystal analysis.
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Journal of the Chemical Society, Chemical Communications
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