Abstract

The cover picture shows a new class of chiral phosphine ligands bearing three imidazole units bridged by boranes. The bowl shaped, C3 symmetric molecules are obtained by a simple condensation procedure. The steric bulk of these monodentate ligands can easily be adjusted over a large range by the use of different chiral or achiral boranes. The ligand character is determined by the almost pure s-character of the phosphorous lone-pair, leading to very short metal-P distances. Details are discussed in the article by Markus Enders, Helene Schall, and Olaf Fritz, et al. on page 630 ff.

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