1,8-Dimethylnaphthalene-bridged diphosphine ligands: synthesis and structural comparison of their palladium complexes

Research output: Contribution to journalJournal articleResearchpeer-review

  • Ronan M Bellabarba
  • Hammond, Colin
  • Grant S Forman
  • Robert P Tooze
  • Alexandra M Z Slawin

The synthesis of a new series of ligands with a 1,8-dimethylnaphthalene backbone is reported, 1,8-(R2PCH2)2C10H6, where R = (t)Bu 1 (dbpn), (i)Pr 2 (dippn), Cy 3 (dchpn) and Ph 4 (dphpn). The ligand 1 is structurally characterised by X-ray crystallography. A comparative structural study of the respective (diphosphine)Pd(dba) and (diphosphine)PdCl2 complexes is carried out, comparing the X-ray crystal structures of complexes 6, 7, 8, 10, 11 and 12. It is shown that the geometry at the metal is affected by not only ligand demands, but also by the palladium oxidation state and the electronic properties of the ligands. Two qualitative stability series are also identified: 9 < 10 < 11 approximately 12 is observed, and P2Pd(dba) complexes are more stable than the corresponding P2PdCl2 complexes towards opening of the chelate ring. It is also concluded that the bite angle is heavily influenced by the electron donating properties of the ligand.

Original languageEnglish
JournalDalton Transactions (Online)
Issue number20
Pages (from-to)2444-9
Number of pages6
Publication statusPublished - 28 May 2006
Externally publishedYes

    Research areas

  • Journal Article

ID: 178883303