Abstract
Abstract The new dialkynyldigold(I) complexes [Ar(OCH2C≡CAu)2]n {Ar = 1,4-C6H4(CMe2-4-C6H4)2, 4,4’-C6H4C6H4 and 1,5-C10H6} react with diphosphines LL = Ph2P(CH2)nPPh2 (n = 1 to 6) and trans-Ph2PCH=CHPPh2 to give luminescent macrocyclic digold(I) or tetragold(I) complexes with bridging diphosphine and diacetylide ligands. The digold(I) complex [1,4-C6H4(CMe2-4- C6H4OCH2C≡CAu)2(μ-LL)], with LL = trans-Ph2PCH=CHPPh2, forms a 28-membered ring, and the rings associate through aurophilic bonding in the solid state. In contrast, the tetragold(I) complex [4,4’-C6H4C6H4(OCH2C≡CAu)2(μ-LL)], with LL = Ph2PCH2PPh2, forms a more rigid 42-membered ring.
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