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Treatment of 1,3,5-tris(3,3-dimethyl-1-butynyl)benzene, C 6 H 3 (C⋮C−CMe 3 ) 3, with di(neopentyl)gallium hydride, HGa(CH 2 CMe 3 ) 2, resulted in the addition of one Ga−H bond to each C⋮C triple bond (hydrogallation). Spontaneous condensation by the release of tri(neopentyl)gallium yielded a [3,3,3]-cyclophane derivative ( 1 ) with three tricoordinated Ga atoms in bridging positions.
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Uhl et al. (2005) studied this question.
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