Reactions between potassium tetraiodidoaurate(III) and pyridine (py, C5H5N) or 3,4-lutidine (3,4-dimethylpyridine, 3,4-lut, C7H9N) were tested as possible sources of azaaromatic complexes of gold(III) iodide, but all identifiable products contained gold(I). The previously known structure dipyridinegold(I) diiodidoaurate(I), [Au(py)2]+·[AuI2]−, (3) [Adamset al.(1982).Z. Anorg. Allg. Chem.485, 81–91], was redetermined at 100 K. The reactions with 3,4-lutidine gave three different types of crystal in small quantities. 3,4-Dimethylpyridine–3,4-dimethylpyridinium diiodidoaurate(I), [(3,4-lut)2H]+·[AuI2]−, (1), consists of an [AuI2]−anion on a general position and two [(3,4-lut)2H]+cations across twofold axes. Bis(3,4-dimethylpyridine–3,4-dimethylpyridinium) diiodidoaurate(I) iodide, [(3,4-lut)2H+]2·[AuI2]−·I−, (2), crystallizes as two polymorphs, each forming pseudosymmetric inversion twins, in the space groupsP21andPc(but resemblingP21/mandP2/c), respectively. These are essentially identical layer structures differing only in their stacking patterns and thus might be regarded as polytypes.
作为碘化金(III)的芳香族络合物的可能来源,对四碘金酸钾与吡啶(py,C5H5N)或 3,4-丁啶(3,4-二甲基吡啶,3,4-lut,C7H9N)之间的反应进行了测试,但所有可识别的产物都含有金(I)。之前已知的二吡啶金(I)二碘金酸盐(I)结构,[Au(py)2]+-[AuI2]-, (3) [Adamset al.(1982).Z. Anorg. Allg. Chem.485, 81-91],在 100 K 下被重新确定。与 3,4-丁烷的反应产生了三种不同数量的晶体。3,4-二甲基吡啶-3,4-二甲基吡啶鎓二碘金酸盐(I),[(3,4-lut)2H]+-[AuI2]-,(1),由位于一般位置的一个[AuI2]阴离子和横跨两倍轴的两个[(3,4-lut)2H]+阳离子组成。双(3,4-二甲基吡啶-3,4-二甲基吡啶鎓)二碘金酸盐(I)碘化物,[(3,4-lut)2H+]2-[AuI2]-I-,(2),以两种多晶体形式结晶,分别形成空间群为 P21 和 Pc(但类似于 P21/mandP2/c)的假对称反转孪晶。它们的层结构基本相同,只是堆叠模式不同,因此可被视为多晶型。