The reaction of 4-ethynyl-2,6-lutidine, (2,6-Me _2)(4-HCC)C _5H _2N (2), with B(C _6F _5) _3 afforded the zwitterion [(2,6-Me _2)(4-(C _6F _5) _3BCC)C _5H _2NH] (3) via a deprotonation pathway. By treatment of 2 with the group 13 trialkyls AlMe _3, AlEt _3, GaMe _3, GaEt _3 and InMe _3, metallation of the ethynyl group afforded compounds 4-8 under extrusion of the corresponding alkane. The resulting products were characterised by elemental analyses and NMR spectroscopy. Compounds 4 and 8 were crystallized from THF and were yielded as monomers with coordinated THF molecules. The gallium compound 7 could be crystallised from benzene and was afforded as coordination polymer. The structures of these three compounds (4·THF, 7 and 8·2THF) were determined by single-crystal X-ray diffraction experiments. The aluminium compounds 4 and 5 show redistribution reaction of their substituents.
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