Two new gold(III) complexes with adenine or guanine nitrogenous bases as counter‐cations were synthesized. These are 6‐amino‐7H‐purine‐1,9‐diium tetrachloridogold(III) chloride monohydrate, (C₅H₇N₅)[AuCl₄]Cl·H₂O, 1, and 2‐amino‐6‐oxo‐6,7‐dihydro‐1H‐purin‐9‐ium tetrachloridogold(III) hemihydrate, (C₅H₆N₅O)[AuCl₄]·0.5H₂O, 2. Their crystal structures were studied using single‐crystal X‐ray diffraction and FT–IR spectroscopic techniques. The arrangement of species in the studied crystal structures implies π‐stacking interactions, as well as concomitant C—H…π interactions, hydrogen bonds and other types of noncovalent interactions, which were studied qualitatively and quantitatively using the method of molecular Voronoi–Dirichlet polyhedra. The variation of the nitrogenous base from adenine to guanine results in evident differences in the packing of the species in the crystals of 1 and 2. The splitting and shifting of bands in the FT–IR spectra of the title compounds reveals several features representative of noncovalent interactions in their crystal structures.

中文翻译：

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腺嘌呤或鸟嘌呤核苷新的金酸盐的合成和晶体结构。

合成了两个带有腺嘌呤或鸟嘌呤含氮碱作为抗衡阳离子的新金（III）配合物。这些是6-氨基-7 H-嘌呤-1,9-氯化四氯化金（III）一水合物，（C ₅ H ₇ N ₅）[AuCl ₄ ] Cl·H ₂ O，1和2-氨基-6-氧代-6,7-二氢-1 H-嘌呤-9-四氯化金（III）半水合物，（C ₅ H ₆ N ₅ O）[AuCl ₄ ]·0.5H ₂ O，2。使用单晶X射线衍射和FT-IR光谱技术研究了它们的晶体结构。在所研究的晶体结构中物种的排列暗示了π-堆积相互作用，以及伴随的CH-H…π相互作用，氢键和其他类型的非共价相互作用，这是使用分子Voronoi–Dirichlet多面体方法定性和定量研究的。氮碱基从腺嘌呤到鸟嘌呤的变化导致1和2晶体中物质堆积的明显差异。标题化合物的FT-IR谱带的分裂和移动揭示了代表其晶体结构中非共价相互作用的几个特征。