Abstract

The reactions of potassium dichlorodicyanoaurate with n-propyl-, iso-butyl-, and n-heptyltriphenylphosphonium bromides in water followed by recrystallization from acetonitrile give dichlorodicyanoaurate complexes [Ph₃P(n-Pr)][Au(CN)₂Cl₂] (I), [Ph₃P(i‑Bu)][Au(CN)₂Cl₂] (II), and [Ph₃P(n-Hp)][Au(CN)₂Cl₂] (III). Compounds I−III are identified by elemental analysis and IR spectroscopy. The structure of compound III is also proved by X-ray diffraction (XRD) (CIF file CCDC no. 2094701). According to the XRD data, complex III consists of n-heptyltriphenylphosphonium cations and crystallographically independent planar square dichlorodicyanoaurate anions of two types with similar geometric parameters. The steric organization of the crystal of complex III is formed by hydrogen bonds С–H∙∙∙N≡C (2.55–2.63 Å) and С–H∙∙∙Cl–Au (2.87 Å). In addition, the structure contains С–H∙∙∙π(Ph) contacts with the distances from the hydrogen atom to the benzene ring plane equal to 2.80 Å.

中文翻译：

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有机三苯基膦二氯二氰金酸盐 [Ph3PR][Au(CN)2Cl2]（R = n-Pr、i-Bu 和 n-Hp）：合成和结构

摘要

二氯二氰金酸钾与溴化正丙基、异丁基和正庚基三苯基鏻在水中反应，然后从乙腈中重结晶，得到二氯二氰金酸配合物[Ph ₃ P( n -Pr)][Au(CN) ₂ Cl ₂ ] ( I )、[Ph ₃ P( i ‑Bu)][Au(CN) ₂ Cl ₂ ] ( II ) 和 [Ph ₃ P( n -Hp)][Au(CN) ₂ Cl ₂ ] ( III ) 。化合物I – III通过元素分析和红外光谱进行鉴定。化合物III的结构也通过X射线衍射(XRD)证明(CIF文件CCDC no.2094701)。根据 XRD 数据，配合物III由正庚基三苯基鏻阳离子和晶体学独立的平面方形二氯二氰基金酸盐阴离子组成，两种类型具有相似的几何参数。配合物III晶体的空间结构由氢键 С–H∙∙∙N≡C (2.55–2.63 Å) 和 С–H∙∙∙Cl–Au (2.87 Å) 形成。此外，该结构包含С–H∙∙∙π(Ph)接触，氢原子到苯环平面的距离等于2.80 Å。