SYNTHESE ET REACTIVITE D'UN COMPLEXE DIENE-FER-TRICARBONYLE DERIVE DU PHENYL-1-DIMETHYL-3,4-PHOSPHOLE

Article abstract of DOI:10.1016/0022-328X(84)80140-0

The complex (DMPP)Fe2(CO)7 in which DMPP (1-phenyl-3,4-dimethylphosphole) is η⁴-coordinated with Fe(CO)3 through its diene and η¹-coordinated with Fe(CO)4 through its phosphorus atom is selectively decomplexed at phosphorus to give (DMPP)Fe(CO)3 by reaction with AlCl3 followed by NH4OH.This new η⁴-complex (DMPP)Fe(CO)3 can be oxidized, sulfurized and quaternized at phosphorus by H2O2, S8, and PhCH2Br and MeI, respectively,as an ordinary phosphine without decomplexation of the diene.As a free phosphole, this complex also gives a ring-expanded product by reaction with bezoyl chloride, water and Et3N.In the presence of some metallic salts such as (PhCN)2PdCl2, it loses CO to give the bimetallic sandwich <(DMPP)Fe(CO)2>2.It can also give some new bimetallic complexes such as <(DMPP)Fe(CO)3>W(CO)5 by complexation of the phosphorus lone pair by W(CO)5(THF).