Cyclometalation Reaction Of Iron Complexes Supported By Trimethylphosphine

Iron belongs to VIII family of transition metals, Fe (0) and the different valence ion complexation is a strong tendency with a view to achieve more electronic inert gases (Kr). Because of its fine coordination activity and relatively low price, it has been widely used in organic synthesis, industrial catalysis, etc.Trimethylphosphine coordinates with transition metals very strongly and forms steady compounds. Trimethylphosphine can stabilize M-C bond. The organic compounds of iron coordinated with trimethylphosphine have high reaction activity and selectivity.Metallothionein complex is a common regulator in biological electron transfer, metallothionein complexes exist in the basic catalyst and biological processes. Therefore, The study of this domain has been a hotspot in the fields of coordination chemistry for recent years. In this thesis, new hydrido iron compounds were received through the reaction of FeL₄ with thiophenol. These compounds were characterized with IR, ¹H NMR, ¹³C NMR and ¹P NMR analyses. The reactions of hydrido iron compounds with PhCH and CO were discussed.Schiff-base is widely used in industrial chemical production and scientific research as chelating agent, stabilizer, bioactivator, analytical reagent and catalyzer etc. With oxidative addition of O-H bond at iron centre, hydrido iron compounds containing a Schiff-base chelating ring were expected to obtain by reaction of FeL₄(L=PMe₃) with salicylaldimines.Instand of the expected hudrido iron compounds the stable rion compounds with salicylaldiminato(N:O) chelating ligands were obtained under the experimental conditions.The study of activation of C-Cl bond has important significance and value. Mastery of the activation of C-Cl bond will help us to find a new chlorination, dechlorination and C-Cl bond key functional way, and help us study the new chlorinated organic synthesis. Moreover, the chlorine compounds help solve the increasingly serious problem of environmental pollution. New six-coordinated iron chelate complexes were obtained by the reaction of FeL₄ (L=PMe₃) with N-alky]-2,6-Dichlorobenzaldehydeamine. These complexes were characterized with IR, ¹H NMR, ¹³C NMR and ¹P NMR analyses. The crystal structure was determined with X-ray diffraction. And the reaction mechanism was discussed. The reaction of these chelate complexes with CO, CH₃MgCl, CH₃Li have been preliminary explored.