Synthesis and Structural Characterization of a Halide-Free Rhombohedral Silver-Alkynyl Cage Complex [Ag14(C2tBu)12][BF4]2

The novel cationic complex [Ag14(C2tBu)12]2+ has been synthesized by four reactions: reaction of [Ag(C2tBu)]n and AgBF4 in acetone in a 6:1 mole ratio, that of HC≡CtBu and AgBF4 in water in the absence of a base, treatment of [AgC2tBu]n with HBF4 in acetone or that of {[Ag3(C2tBu)2][BF4]}n with [Ag(C2tBu)]n in a 1:4 mole ratio. Single-crystal X-ray studies showed it to be a hexacapped cube of silver(I) atoms, with twelve η1, μ3-C2tBu ligands. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)

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