✦ LIBER ✦

Square-Planar 2-Toluenido(triphenylphosphane)nickel(II) Complexes Containing Bidentate N,O Ligands: An Example of Planar Chirality

✍ Scribed by Udo Beckmann; Gerhard Hägele; Walter Frank

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 506 KB
Volume: 2010
Category: Article
ISSN: 1434-1948
DOI: 10.1002/ejic.200901196

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✦ Synopsis

Abstract

Nickel(II) complexes comprising electronically delocalised N,O‐chelating ligands are active catalysts in the copolymerisation of carbon monoxide and ethene. Elucidating the mechanism of catalysis presupposes the basic understanding of the intramolecular flexibility of such transition metal complexes. Several nickel(II) complexes with or without planar chirality were synthesised and characterised by NMR spectroscopic techniques and X‐ray diffraction.

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Nickel(II) Complexes of Chiral Tripodal N,O,S-Ligands: Square-Planar vs. pseudo-Octahedral Coordination in the Solid State and in Solution, Metal-Induced Racemization of the Ligand

✍ Berkessel, Albrecht ;Seidel, Lutz ;Bats, Jan W. ;Bolte, Michael ;Neumann, Thomas 📂 Article 📅 1997 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 683 KB

The complexation behavior of three chiral, tripodal N,O,Sligands with nickel(I1) salts was examined. It was found that the coordination mode of the ligands (bidentate N,O and N,S; tridentate N,O,S) and of the central nickel ion (square-planar vs. pseudo-octahedral) is not simply an intrinsic propert