259686-19-6Relevant academic research and scientific papers
Reactions of coordinated ligands. Part 19: Template synthesis of a macrocyclic secondary tetraphosphine by oxidative demetallation of crown phosphine Ni(II) complexes
Lebbe, Thomas,Machnitzki, Peter,Stelzer, Othmar,Sheldrick, William S.
, p. 157 - 164 (2000)
The nickel(II) complex 3 containing a 14-membered macrocyclic triphosphine phosphinate ligand is obtained by regioselective oxidation of the crown phosphine nickel(II) complex 2c with molecular oxygen. The X-ray structure of 3 · H2O (space group P21/c) has been determined. Oxidation of the macrocyclic phosphinous acid nickel(II) complex 2a (P4 donor set) with H2O2/HCl or Br2 and subsequent demetallation affords the macrocyclic phosphinic acid 5. Reaction of its methylester 6 with thionyl chloride and subsequent reduction with LiAlH4 gives the novel macrocyclic PH functional tetradentate phosphine 8 in high yields.
