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The gas-phase reaction between 1-MeB 5 H 8 and propyne at 230 o C yields methyl derivatives of nido-2,3-dicarbahexaboranes and closo-2,4-dicarbaheptaboranes. The reaction between 1-MeB 5 H 8 and 2-pentyne at 190 o C gives analogous alkyl nido-carbaboranes (but not closo-carbaboranes). Detailed boron and proton NMR data on these products in conjunction...
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