title: Isolable tris(alkyne) and bis(alkyne) complexes of gold(I).
abstract: Golden trefoils: Tris(alkyne)gold complex [(coct)(3)Au][SbF(6)] (see picture; 1-SbF(6)) can be synthesized from cyclooctyne (coct) and AuSbF(6) generated in situ. Treatment of AuCl with cyclooctyne led to the bis(alkyne)gold complex [Au(coct)(2)Cl] (2). DFT analysis indicates that the cyclooctyne ligands are net electron donors in 1 but overall electron acceptors in 2. AuSbF(6) is shown to mediate [2+2+2] cycloaddition reactions of alkynes.
authors.affiliation: Department of Chemistry and Biochemistry, The University of Texas at Arlington, 76019, USA.
authors.forename: Animesh
authors.initials: A
authors.lastname: Das
authors.forename: Chandrakanta
authors.initials: C
authors.lastname: Dash
authors.forename: Muhammed
authors.initials: M
authors.lastname: Yousufuddin
authors.forename: Mehmet Ali
authors.initials: MA
authors.lastname: Celik
authors.forename: Gernot
authors.initials: G
authors.lastname: Frenking
authors.forename: H V Rasika
authors.initials: HV
authors.lastname: Dias