title: Synthesis and solution- and solid-state characterization of gold(I) rings with short Au...Au interactions. Spontaneous resolution of a gold(I) complex.
abstract: We report the synthesis and solution- and solid-state characterization of gold(I) rings with short 1,9-transannular Au...Au interactions. The 9- and 16-membered gold(I) rings were prepared by reacting 9,9-dimethyl-4,5-bis(diphenylphosphino)-xanthene and (Me2S)AuCl in the presence of AgNO3 in the molar ratio of 1:0.5:1 and 1:1:1, respectively. X-ray crystallographic measurements in conjunction with solution X-ray diffraction and NMR methods have been used to determine the structure of gold(I) rings, and we also gained insight into the dynamics. The nine-membered gold(I) ring is chiral, and the crystal contains only one of the two enantiomers, either right- or left-handed. To the best of our knowledge this represents the first example of crystallization-induced spontaneous resolution of a binuclear gold(I) cycle. The 16-membered ring with 1,9-transannular Au...Au interaction is in a figure-eight conformation.
authors.affiliation: Institute of Structural Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P.O. Box 17, H-1525 Budapest, Hungary.
authors.forename: Andrea
authors.initials: A
authors.lastname: Deák
authors.forename: Tünde
authors.initials: T
authors.lastname: Megyes
authors.forename: Gábor
authors.initials: G
authors.lastname: Tárkányi
authors.forename: Péter
authors.initials: P
authors.lastname: Király
authors.forename: László
authors.initials: L
authors.lastname: Biczók
authors.forename: Gábor
authors.initials: G
authors.lastname: Pálinkás
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Stang