New Structural Motifs Resulting from Internal Constraints
in Chelating Bis(NHC) Ligands: A Dinuclear Ruthenium(II) Complex Featuring
an η<sup>2</sup>‑Arene Binding Mode and a Remarkable
New Tetrameric Silver(I) Halide Form
Peter
V. Simpson
David H. Brown
Brian W. Skelton
Allan
H. White
Murray V. Baker
10.1021/om5012165.s001
https://acs.figshare.com/articles/journal_contribution/New_Structural_Motifs_Resulting_from_Internal_Constraints_in_Chelating_Bis_NHC_Ligands_A_Dinuclear_Ruthenium_II_Complex_Featuring_an_sup_2_sup_Arene_Binding_Mode_and_a_Remarkable_New_Tetrameric_Silver_I_Halide_Form/2160538
A novel
dinuclear ruthenium(II) complex containing two <i>ortho</i>-xylylene-linked bis(NHC) ligands (NHC = N-heterocyclic
carbene) has been synthesized via transmetalation from a silver-NHC
complex. Each ruthenium atom in the dinuclear complex is chelated
through the two carbene carbon atoms and, unusually, an η<sup>2</sup>-bound xylylene ring, two separate bis(NHC) units being linked
by a Ru(μ-Cl)<sub>3</sub>Ru core. The same bis(NHC) ligand has
yielded a neutral tetranuclear 4:2 AgBr:bis(NHC) complex, where ligand
steric constraints seemingly inhibit formation of structures derivative
of the more familiar “cubane” or “step”
forms, resulting in an interesting new structural type.
2015-06-08 00:00:00
New Structural Motifs Resulting
dinuclear
NHC
Internal Constraints
ruthenium atom
bi
ligand steric constraints
carbene carbon atoms
xylylene ring