Synthesis and Stereochemistry of Chiral Macrocycles Including a 1,2‐Bis(phenylphosphanyl)benzene Unit

Abstract

The synthesis of the four 1,1′‐binaphthyl‐based macrocyclic bisphosphane ligands 6b – e (racemic and optically active) and their square‐planar cis ‐P 2 ‐MCl 2 complexes (M = Ni, Pd) is reported. In three cases isomers could be isolated and identified. The absolute and relative stereochemistry of all ligands and complexes was established on the basis of their NMR and CD spectra and finally confirmed by X‐ray structural determinations of selected ligands and complexes.