The march of progress: structures of the adducts of potassium dicyanidoaurate(I) with 2,2′-bipyridyl (redetermination) and 1,10-phenanthroline

Abstract

The structure of the 2,2′-bipyridyl adduct poly[(μ2-2,2′-bipyridyl-κ3 N,N′:N)di-μ3-cyanido-κ6 C:N:N-gold(I)potassium(I)], [AuK(CN)2(C10H8N2)] n , (1) (space group P21), has been redetermined [previous determination: Jones et al. (1980). Acta Cryst. B36, 160–162]. The bipyridyl ligands coordinate only the potassium ion, which has a coordination sphere consisting of seven N-atom donors; gold(I) remains in the form of linear dicyanidoaurate(I) ions. The extended structure consists of layers in which the AuI atoms form chains parallel to the short a axis, with Au...Au contacts of 3.7286 (1) Å, whereas the chains of potassium ions, which are also parallel to a, are bridged by bipyridyl and dicyanidoaurate residues. The analogous 1,10-phenanthroline adduct, namely poly[di-μ3-cyanido-κ6 C:N:N-(μ2-1,10-phenanthroline-κ3 N,N′:N)gold(I)potassium(I)], [AuK(CN)2(C12H8N2)] n , (2), crystallizes as nonmerohedral twins in the space group C2/c. The packing is closely related to that of (1), but the chains are now parallel to the short b axis and the layers are parallel to (10\overline{1}). The two independent AuI atoms occupy special positions on inversion centres and twofold axes; the Au...Au contacts are 3.6771 (2) Å.

The Early Years of 2,2′-Bipyridine—A Ligand in Its Own Lifetime

“…The first gold bpy complex to be claimed was {KAu(bpy)(CN) 2 }, which was obtained from the reaction of K[Au(CN) 2 ] with bpy and reported to contain a square-planar [Au(bpy)(CN) 2 ] – ion, on the basis of X-ray crystallographic data showing a very short (3.74 Å) b -axis [252]. Some 40 years later, the crystal structure of the compound was determined and it was shown to contain linear [Au(CN) 2 ] – anions; the bpy was not coordinated to the gold but adopts a cisoid conformation and interacts with the potassium cations at 2.778 and 3.080 Å (Figure 26a) [253,254]. In view of the current interest in organogold compounds in organic synthesis, it is appropriate that one of the first gold complexes containing a bpy ligand should be an organometallic compound [255].…”

Sterically Hindered Tellurium(IV) Catecholate as a Lewis Acid

“…Most of them represent complexes of late transition metals, with a sole example of the p -block element found in [In 3 (bipy) 5 ] 3+ . Also, for the μ-κ 1 N :κ 2 N , N ′-bridging coordination mode, only one example is known, namely, polymeric [K­(bipy)­Au­(CN) 2 ] n . There the bipy molecules are coordinated to K + ions in a μ-κ 1 N :κ 2 N , N ′-mode, forming infinite chains (Figure S3).…”

“…33c Also, for the μ-κ 1 N:κ 2 N,N′-bridging coordination mode, only one example is known, namely, polymeric [K(bipy)Au-(CN) 2 ] n . 24 There the bipy molecules are coordinated to K + ions in a μ-κ 1 N:κ 2 N,N′-mode, forming infinite chains (Figure…”

Synthesis methods, structure and applications of metal di-, tetra- and dihalodicyanoaurates

“…Отдельно стоит привести комплексы K(L)[Au(CN) 2 ] (L = bipy, phen) [162], Интересные N-донорные лиганды с комбинированной хелатно-мостиковой донорной функцией были также описаны в работах [166,167]. Общая схема синтеза дицианоауратных комплексов с ними представлена ниже.…”