title: Synthesis, structural characterisation and stereochemical investigation of chiral sulfur-functionalised N-heterocyclic carbene complexes of palladium and platinum.
abstract: Palladium and platinum complexes containing a sulfur-functionalised N-heterocyclic carbene (S-NHC) chelate ligand have been synthesised. The absolute conformations of these novel organometallic S-NHC chelates were determined by X-ray structural analyses and solution-phase 2D (1)H-(1)H ROESY NMR spectroscopy. The structural studies revealed that the phenyl substituents on the stereogenic carbon atoms invariably take up the axial positions on the Pd-C-S coordination plane to afford a skewed five-membered ring structure. All of the chiral complexes are structurally rigid and stereochemically locked in a chiral ring conformation that is either (Rs ,S,R)-λ or (Ss ,R,R)-δ in both the solid state and solution.
authors: Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
authors: Deepa
authors: D
authors: Krishnan
authors: Sumod A
authors: SA
authors: Pullarkat
authors: Meiyi
authors: M
authors: Wu
authors: Yongxin
authors: Y
authors: Li
authors: Pak-Hing
authors: PH
authors: Leung