Three-coordinate bipyridyl complexes of gold, [(κ2-bipy)Au(η2-C2H4)][NTf2], are readily accessed by direct reaction of 2,2'-bipyridine (bipy), or its derivatives, with the homoleptic gold ethylene complex [Au(C2H4)3][NTf2]. The cheap and readily available bipyridyl ligands facilitate oxidative addition of aryl iodides to the Au(I) center to give [(κ2-bipy)Au(Ar)I][NTf2], which undergo first aryl-zinc transmetalation and second C-C reductive elimination to produce biaryl products. The products of each distinct step have been characterized. Computational techniques are used to probe the mechanism of the oxidative addition step, offering insight into both the origin of the reversibility of this process and the observation that electron-rich aryl iodides add faster than electron-poor substrates. Thus, for the first time, all steps that are characteristic of a conventional intermolecular Pd(0)-catalyzed biaryl synthesis are demonstrated from a common monometallic Au complex and in the absence of directing groups.

中文翻译：

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2,2'-联吡啶连接金中心的氧化加成、金属转移和还原消除

金的三配位联吡啶配合物 [(κ2-bipy)Au(η2-C2H4)][NTf2] 很容易通过 2,2'-联吡啶 (bipy) 或其衍生物与同配型金的直接反应获得乙烯络合物 [Au(C2H4)3][NTf2]。廉价且容易获得的联吡啶配体有助于将芳基碘化物氧化加成到 Au(I) 中心，得到 [(κ2-bipy)Au(Ar)I][NTf2]，其经历第一次芳基-锌转移和第二次 CC 还原消除生产联芳基产品。每个不同步骤的产品已被表征。计算技术用于探索氧化加成步骤的机制，提供对该过程可逆性的起源以及富电子芳基碘化物比缺电子底物加成速度更快的观察结果。于是，第一次，