The synthesis of a series of mono- and binuclear cyclometalated gold(III) complexes containing the tridentate C^∧N^∧C ligand (HC^∧N^∧CH = 2,6-diphenylpyridine) was developed using K[AuCl₄] and the organomercury(II) compound Hg(C^∧N^∧CH)Cl as precursors. The molecular structures of [Au(C^∧N^∧C)(Spy-2)] (Spy-2 = 2-mercaptopyridine), [Au(C^∧N^∧C)PPh₃]ClO₄, [Au₂(C^∧N^∧C)₂(μ-dppm)](ClO₄)₂, and [Au₂(C^∧N^∧C)₂(μ-dppe)](ClO₄)₂ have been determined by X-ray crystallography. In the crystal lattice of [Au₂(C^∧N^∧C)₂(μ-dppm)](ClO₄)₂ and [Au₂(C^∧N^∧C)₂(μ-dppe)](ClO₄)₂, interplanar separations of 3.4 Å are observed between the intramolecular [Au(C^∧N^∧C)] moieties, which imply the presence of weak π−π interactions. The torsion angle between the two [Au(C^∧N^∧C)] units in the former is 8.7°, while a larger angle (34.2°) is observed in the latter. In the absorption spectra, the binuclear complexes show a red shift for the absorption band in the near-visible region compared to the mononuclear analogues. This is attributed to π−π interactions between the intramolecular C^∧N^∧C ligands in solution. The new complexes are emissive at low temperatures (77 K) in acetonitrile.

中文翻译：

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2,6-二苯基吡啶的应用程序作为一个三齿[C ^∧ Ñ ^∧ C]双阴离子配体在Organogold（III）化学。单核和双核超金属化金（III）配合物的结构和光谱性质

一系列含有三齿Ç单-和双核环金属金（III）配合物的合成^∧ Ñ ^∧ Ç配体（HC ^∧ Ñ ^∧ CH = 2,6-二苯基吡啶）用K [AUCL开发₄ ]和有机汞（ II）化合物汞柱（C ^∧ ñ ^∧ CH）氯作为前体。[金（C的分子结构^∧ Ñ ^∧ C）（间谍-2）]（间谍-2 = 2-巯基吡啶），[金（C ^∧ Ñ ^∧ C）PPH ₃ ] CLO ₄，[金₂（C ^∧ ñ ^∧ C）₂（μ-DPPM）]（CLO ₄）₂，和[金₂（C ^∧ Ñ ^∧ C）₂（μ-DPPE）]（CLO ₄）₂已通过X射线晶体学确定。在的晶格[金₂（C ^∧ Ñ ^∧ C）₂（μ-DPPM）]（CLO ₄）₂和[金₂（C ^∧ Ñ ^∧ C）₂（μ-DPPE）]（CLO ₄）₂，3.4埃的晶面间距是分子内[金（C之间观察^∧ ñ ^∧C）]部分，这意味着存在弱的π-π相互作用。两个[金（C的扭转角^∧ Ñ ^∧在前C）]单元为8.7°，而一个较大的角度（34.2°）在后者观察。在吸收光谱中，与单核类似物相比，双核络合物在近可见区域的吸收带显示出红移。这归因于分子内C的π-π相互作用^∧ Ñ ^∧中溶液C的配体。新的络合物在乙腈中在低温（77 K）时会发光。