Bisxantphos: Stereoselective synthesis and coordination behaviour of a new class of cyclic double bridged diphosphines

Rene den Heeten, Erik Zuidema, Martin Lutz, Anthony L. Spek, Piet W. N. M. van Leeuwen, Paul C. J. Kamer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

A new class of cyclic double bridged diphosphine ligands was developed and the coordination properties are described. The reaction of 4,5-dilithioxanthene with dichlorophenylphosphine gave a cyclic double bridged diphosphine ligand based on two xanthene backbones (4) as a single stereoisomer. X-ray crystal structure determination revealed that the groups bridging the two phosphorus atoms are arranged in a syn-disposition. This new cyclic bisxantphos structure was modified with bulky residues at the third substituent of the phosphorus atoms, thus forming cavity-shaped ligands. (C) 2011 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)3113-3120
Number of pages8
JournalJournal of Organometallic Chemistry
Volume696
Issue number19
DOIs
Publication statusPublished - 15 Sept 2011

Keywords

  • LINEAR ALDEHYDES
  • Bis-Xantphos
  • PALLADIUM
  • LIGANDS
  • X-RAY
  • Cyclic diphosphine
  • Bite angle
  • Metallo-cavitands
  • Ligand design
  • INTERNAL OLEFINS
  • XANTPHOS
  • RHODIUM-CATALYZED HYDROFORMYLATION
  • TRANSITION-METAL-COMPLEXES
  • HEMISPHERICAL CHELATORS
  • LARGE BITE ANGLES

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