Self-Assembly of Multinuclear Sandwich Silver(I) Complexes
by Cooperation of Hexakis(azaheteroaryl)benzene Ligands, Argentophilic Interactions, and Fluoride Inclusion
posted on 2020-03-05, 13:03authored byMiha Drev, Uroš Grošelj, Drago Kočar, Franc Perdih, Jurij Svete, Bogdan Štefane, Franc Požgan
Self-assembly of AgOTf and AgF with
the hexatopic ligands hexakis(pyridin-2-yl)benzene (2) and 2,4,6-tris(pyridin-2-yl)-1,3,5-tris(quinolin-2-yl)benzene (3) affords the discrete sandwich-shaped complexes [Ag4F(2)2](OTf)3, [Ag4F(3)2](OTf)3, and [Ag5F(2)2](OTf)4. The solid-state
structures of the complexes were characterized by single-crystal X-ray
diffraction analysis, which revealed that the fluoride anion is coordinated
in the center of the Ag4-square or Ag5-pentagon
units which are positioned between two molecules of the hexakis(azaheteroaryl)benzene.
The generation of complexes is dictated by a unique cooperation of
ligand coordination, argentophilicity, and fluoride anion inclusion.
All three complexes adopt highly symmetrical structures in solution,
as evidenced by appearance of one set of proton resonances for the
two ligands arranged face to face.