75 / 2023-09-12 19:54:46

2,3,4,5-Tetraaryl-1-monophosphaferrocene as a ligand for transition metal complexes

White Phosphorus,phosphaferrocene,metal complexes,phospholide

Phosphorus in Synthetic Chemistry > 2) Phosphorus compounds as ligands

Phosphaferrocenes are ferrocene derivatives in which one or several CH-fragments in the cyclopentadienyl ring are replaced by a phosphorus atoms (P-fragments).[1,2] New 2,3,4,5-tetraaryl-1-monophosphaferrocenes were prepared from alkali metal 2,3,4,5-tetraaryl-1-monophosphacyclopentadienide (1) and (toluene) cyclopentadienedienyl-iron (II) hexafluorophosphate salt [FeCp(η6-C6H5CH3)]+[PF6]- with 24-58% yields. Tungsten carbonyl complexes of W(CO)nL (W(CO)5THF and W(CO)4nbd) were used to investigate the coordination properties of the obtained 2,3,4,5-tetraaryl-1-monophosphapherocenes (2). The structure of new compounds 1-3 was proved by 31P, 1H, 13C NMR spectroscopy and the single-crystal X-ray diffraction.[3] The electrochemical properties of 1-monophosphaferrocenes 2 and W(CO)n-complexes 3 were studied. The quasi-reversible oxidation wave is observed at oxidation of structure 2, while in the case of W(CO)n-complexes 3 the quasi-reversibility disappeared. This work was supported by the Russian Science Foundation (project no. 21-73-10204)