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The reaction of (tht)AuX (X=Cl or Br; tht=tetrahydrothiophene) with various primary amines L leads to products of the form [L 2 Au] + X − . Packing diagrams of the corresponding structures are dominated by N–H···X hydrogen bonds and (in some cases) aurophilic contacts. The cyclohexylamine derivative was already known as its dichloromethane ⅔-solvate; we have isolated the solvent-free compound and its pentane ¼-solvate, which all show different packing patterns. With acyclic secondary amines, the products are more varied; LAuX and [L 2 Au] + [AuX 2 ] −  were also found. These gold(I) products were generally formed in satisfactory quantities. The attempted oxidation to Au(III) derivatives with PhICl 2  or Br 2  proved impossible for the primary amine derivatives [although isopropylamine-trichloridogold(III) was obtained unexpectedly from the corresponding cyanide] and unsatisfactory for the secondary amine derivatives. Products LAuX 3  and [L 2 AuX 2 ] + [AuX 4 ] −  were identified but were formed in disappointing yields. In isolated cases protonated products (LH) + [AuCl 4 ] − , (LH + ) 3 [AuCl 4 ] − (Cl − ) 2  or [(Et 2 N) 2 CH] + [AuBr 4 ] −  were formed, presumably by involvement of the dichloromethane solvent and/or adventitious water. Here also the yields were poor, and some products arose as mixtures. Direct reaction of amines with AuCl 3  or (tht)AuX 3  was also unsuccessful. All products were characterized by X-ray structure analysis.

Aminkomplexe des Goldes, Teil 9: Gold(I)-halogenid-Komplexe mit primären und azyklischen sekundären Aminen und ihre Oxidation zu Gold(III)-Derivaten