Helium compounds carbon bonding

Bortnikov et al243 also separated compounds containing bonds between 2 or 3 like or unlike heteroatoms (silicon, germanium, tin or sulphur) on columns of silanized Chromasorb W coated with 20% Apiezon L, 15% of polyoxyethylene glycol 20M or Reoplex 400, also by gas-solid chromatography on graphitized thermal carbon black with helium as carrier gas and a flame ionization or thermal conductivity detector. 

Structure Carbon subjected to +1300°C in helium atmosphere, resulting in a graphite-like structure in the form of polyhedra, with virtually no unsaturated bonds, ions, lone electron pairs, or free radicals Analytical Properties Especially for use in microbore columns suggested for lower aromatics but with some potential for higher-molecular-mass compound separations Reference 7-10... 

Chemists at Yale University have managed to trap heUum and neon inside buckyballs. This is the first time chemists have ever observed helium or neon in a compound of any kind. They found that at temperatures from 1000 F to 1500 F one of the covalent bonds linking neighboring carbon atoms in the buckyball breaks. This opens a window in the fiillerene molecule through which a helium or neon atom can enter the buckyball. When the fullerene is allowed to cool, the broken bond between carbon atoms re-forms, shutting the window and trapping the helium or neon atom inside the buckyball. Since the trapped helium or neon cannot react or share electrons with its... 

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