Intermolecular aurophilic interactions facilitate assembly of a complex rotaxane in solution

Abstract

We describe the formation of a complex [2]rotaxane both in solution and in the solid state. The rotaxane ring is composed of a cyclic trinuclear gold complex and the Au(PMe(3))(2)(+) rod is held in place by three aurophilic interactions to the ring Au atoms. The existence of the [2]rotaxane in solution is confirmed by VT-NMR and MS analysis.

Strategies and Tactics for the Metal‐Directed Synthesis of Rotaxanes, Knots, Catenanes, and Higher Order Links

“…[293,295] This type of aurophilic assembly was extended to rotaxane structures by Raubenheimer and Barbour, incorporating N-heterocyclic carbenes into a tris-Au I macrocyclic species while using an Au I -diphosphine thread. [296]…”

Strategien und Taktiken für die metallgesteuerte Synthese von Rotaxanen, Knoten, Catenanen und Verschlingungen höherer Ordnung

“…Diese Art des aurophilen Aufbaus wurde von Raubenheimer und Barbour auf Rotaxanstrukturen erweitert, die unter der Verwendung eines Au I -Diphosphinstrangs N-heterocyclische Carbene in eine makrocyclische Tris-Au I -Spezies einbauten. [296]…”

18-Membered Heterometallacyclic Gold(I) Compounds: Structural Influences of Co-crystallized Solvent

“…Encouraged by the above-mentioned result in which a [Au(PMe 3 ) 2 ] + complex cation is trapped in the center of an 18-membered gold-containing ring by aurophilic interactions [5], the incorporation of linear chloro(t-butylisocyanide)gold(I) within cyclic 1 was investigated. No reaction was observed but, interestingly, crystals of a second THF solvate, 1b, were recovered from the reaction mixture.…”

“…1) [5]. Furthermore, some of us have reported the interaction of cyclic metal-organic rings with gases, solvent molecules and dissolved substances [6 -9].…”