Metal-Mediated Synthesis of a Mixed Arduengo-Fischer Carbodicarbene Ligand.

Carbodicarbenes are strong C-donor ligands, which have found numerous applications in organometallic and main group element chemistry. Herein, we report a structurally distinct carbodicarbene ligand, which is formed by dinitrogenative coupling of a Fischer carbene complex with an N-heterocyclic diazoolefin. The resulting carbonyl complex serves as a stable source for the mixed Arduengo-Fischer carbodicarbene ligand.

Orientational Self-Sorting in Octahedral Palladium Cages: Scope and Limitations of the " Rule".

Octahedral coordination cages of the general formula [PdL](BF) were obtained by combining [Pd(CHCN)](BF) with heteroditopic N-donor ligands. Four different ligands were employed. These ligands have 3-pyridyl donor groups at one end and 4-pyridyl, imidazolyl, or triazolyl donor groups at the other end.

Two-Electron Redox Reactivity of Thorium Supported by Redox-Active Tripodal Frameworks.

The high stability of the + IVoxidation state limits thorium redox reactivity. Here we report the synthesis and the redox reactivity of two Th(IV) complexes supported by the arene-tethered tris(siloxide) tripodal ligands [(KOSiR Ar) -arene)]. The two-electron reduction of these Th(IV) complexes generates the doubly reduced [KTh((OSi(O Bu) Ar) -arene)(THF) ] (2 ) and [K(2.

Synthetic Receptors with Micromolar Affinity for Chloride in Water.

A water-soluble coordination cage was obtained by reaction of Pd(NO ) with a 1,3-di(pyridin-3-yl)benzene ligand featuring a short PEG chain. The cavity of the metal-organic cage contains one nitrate anion, which is readily replaced by chloride. The apparent association constant for chloride binding in buffered aqueous solution is K =1.