The reaction of equivalent quantities of (L)AuCl (L = tetrahydrothiophene, trimethylphosphine, 2,6-xylyl isocyanide or mesityl isocyanide) and KSCN in CH2Cl2–water gave (L)Au(SCN) in excellent yield. The products were formed through Cl ↔ (SCN) anion exchange in the two-phase systems. Crystals of (THT)Au(SCN) contain short inter-ion Au ⋯ Au contacts (3.006 Å) within chain polymers of alternating cations [Au(THT)2]+ and anions [(NCS)2Au]−. The crystal structure of (Me3P)Au(SCN) exhibits dimers based on short Au ⋯ Au contacts of 3.099 Å. The dimers appear to aggregate further by long Au ⋯ S contacts giving a tetrameric motif. Molecules of (2,6-Me2C6H3NC)Au(SCN) crystallise as flat, centrosymmetric dimers with long intermolecular Au ⋯ Au and Au ⋯ S contacts. Although the general aurophilic motif of (2,4,6-Me3C6H2NC)Au(SCN) is similar to (2,6-Me3C6H3NC)Au(SCN), its structure has two different dimers formed from similar monomers. The crystal structure of 2,6-Me2C6H3NC was also characterised and (consistent with bonding theory of metal isocyanides) exhibited a CN bond which is slightly longer than in the gold(I) complex.
等量的(L)AuCl(L =
四氢噻吩、
三甲基膦、2,6-xylyl
异氰酸酯或甲基
异氰酸酯)和 KSCN 在
CH2Cl2-
水中反应生成了(L)Au(SCN),收率极高。这些产物是在两相体系中通过 Cl ↔ (SCN) 阴离子交换形成的。(
THT)Au(SCN)晶体在阳离子[Au(
THT)2]+和阴离子[(
NCS)2Au]-交替组成的链状聚合物中含有短的离子间 Au ⋯ Au 接触(3.006 Å)。(Me3P)Au(SCN) 的晶体结构显示出基于 3.099 Å 短 Au ⋯ Au 接触的二聚体。(2,6-Me2C6H3NC)Au(SCN)分子结晶为扁平的中心对称二聚体,分子间具有长的 Au ⋯ Au 和 Au ⋯ S 接触。虽然(2,4,6-Me3C6H2NC)Au(SCN)的一般亲欧基团与(2,6-Me3C6H3NC)Au(SCN)相似,但其结构却由相似的单体形成两种不同的二聚体。此外,还对 2,6-Me2C6H3NC 的晶体结构进行了表征(与
金属
异氰酸酯的成键理论一致),发现其 CN 键比
金(I)复合物中的 CN 键稍长。