title: Toward molecular rotors: tetra-N-heterocyclic carbene Ag(I)-halide cubane-type clusters.
abstract: 1,3-Bis(3'-butylimidazol-1'-yl)benzene diiodide (2a), 1,3-bis(3'-but-3''-enyl-imidazolium-3'-yl)benzene diiodide (2b), 1,3-bis(3'-pent-4''-enyl-imidazolium-3'-yl)benzene diiodide (2c), 1,3-bis(4'-butyl-1',2',4'-triazolium-1'-yl)benzene diiodide (2d), or 1,3-bis(4'-butyl-1',2',4'-triazolium-1'-yl)benzene dibromide (2e) was reacted with Ag2O yielding unprecedented tetra-N-heterocyclic carbene-Ag(I)-X cubane-type clusters. These were characterized by (1)H and (13)C NMR spectroscopy, ESI-TOF MS, elemental analysis, and X-ray crystallography. Results from VT (13)C NMR spectroscopy and cross-over experiments are consistent with intramolecular exchange suggesting that the Ag(I) complexes are molecular rotors.
authors: Department of Chemistry and Biochemistry, The University of Mississippi, 407 Coulter Hall, University, MS 38677, USA.
authors: Wesley D
authors: WD
authors: Clark
authors: Ginger E
authors: GE
authors: Tyson
authors: T Keith
authors: TK
authors: Hollis
authors: Henry U
authors: HU
authors: Valle
authors: Edward J
authors: EJ
authors: Valente
authors: Allen G
authors: AG
authors: Oliver
authors: Matthew P
authors: MP
authors: Dukes