The synthesis of a series of symmetrical and unsymmetrical tripodal tetradentate alkylphosphine ligands is described. Me 2PCH 2CH 2P(CH 2CH 2CH 2PMe 2) 2 was synthesized by the photochemical reaction of (2-(dimethylphosphino)-ethyl)phosphine with excess allyldimethylphosphine, and Me 2PCH 2CH 2CH 2P(CH 2CH 2PMe 2) 2 was synthesized by the photochemical reaction of (3-(dimethylphosphino)propyl)phosphine with excess dimethylvinylphosphine. The known ligand P(CH 2CH 2PMe 2) 3 was synthesized in a one-step reaction by the photochemical addition of dimethylphosphine (3 equiv) to trivinylphosphine. The tetradentate ligands form one-to-one complexes Fe(PP 3)Cl 2 with iron by displacement of weaker phosphine ligands.
|Number of pages||5|
|Publication status||Published - 1993|