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The ligand-based quintuple bond-shortening concept and some of its limitations.
Herein, the ligand-based concept of shortening quintuple bonds and some of its limitations are reported. In dichromium-diguanidinato complexes, the length of the quintuple bond can be influenced byExpand
Highly active titanium-based olefin polymerization catalysts bearing bulky aminopyridinato ligands.
A series of titanium complexes have been prepared using either salt metathesis or amine elimination reactions. Reacting the potassium salt of Ap*H {Ap*H =Expand
Synthesis and Structure of Zirconium and Hafnium Polymerisation Catalysts Stabilised by Very Bulky Aminopyridinato Ligands
Mono(aminopyridinato) complexes of the type [ApM(CH(2)C(6)H(5))(3)] [M = Zr, Hf and Ap = aminopyridinate] were prepared by treating the three different sterically demanding aminopyridines with oneExpand
Highly active/selective and adjustable zirconium polymerization catalysts stabilized by aminopyridinato ligands
This paper describes a substantial enhancement of the aminopyridinato ligand stabilized early transition metal chemistry by introducing the sterically very demanding 2,6-dialkylphenyl substitutedExpand
Acetylenetitanium Complex Stabilized by Aminopyridinato Ligands
The first acetylenetitanium complex stabilized by aminopyridinato ligands has been prepared by the reaction of Ap2TiCl2 (1) – Ap-H = 2-[(2,6-diisopropylphenyl)amino]pyridine – with equimolar amountExpand
Ultrashort metal-metal distances and extreme bond orders.
Chemical bonding is at the very heart of chemistry. Although main-group-element E-E' bond orders range up to triple bonds, higher formal bond orders are known between transition metals. Here weExpand
Metal-metal distances at the limit: a coordination compound with an ultrashort chromium-chromium bond.
The nature of the chemical bond is of fundamental importance, and has always fascinated scientists. Metal–metal bonds are of particular interest, as bond orders greater than four are known and are ofExpand
Carboalumination of a chromium–chromium quintuple bond.
Bonds are at the very heart of chemistry. Although the order of carbon–carbon bonds only extends to triple bonds, metal–metal bond orders of up to five are known for stable compounds, particularlyExpand
Metal–Metal Distances at the Limit: Cr–Cr 1.73 Å – the Importance of the Ligand and its Fine Tuning
The synthesis and structure of a homobimetallic chro- mium complex is reported. The ligand used to stabilise the quintu- ply bonded metals is a sterically fine-tuned guanidinate. A