Synthesis,Characterization And Properties Of Rare Earth Metal Hydrocarbyl Complexes Containing 1-(2-tetrahydrofuryl Methylene)-3-diphenyl Phosphinyl Methylenyl Indolyl Ligand

This thesis has designed and synthesized the proligand 1-(2-tetrahydrofuryl methylene)-3-diphenyl phosphinyl methylene indole[1-(2-C4H7O CH2)-3-(Ph2P(O)CH2)C8H5N].The proligand were reacted with the rare earth metal trialkyl compounds[RE(CH2SiMe3)3(THF)2][RE=Yb,Er,Y,Dy,Gd]in a toluene solvent with a molar ratio of 1:1 at room temperature,a series of novel dinuclear rare earth metal hydrocarbyl complexes containing 1,3-functionalized indolyl ligand were isolated[{κ3O,C,O-μ-η2-1-(2-C4H7OCH2)-3-(Ph2P(O)CH)C8H4N}RE(CH2SiMe3)]2(RE=Yb,Er,Y,Dy,Gd)through the C(sp2)-H boud at the 2-position of the indolyl ring and the C(sp3)-H boud of the diphenylphosphinyl methylene activation.All the above complexes were further determined by X-ray single crystal diffraction,and characterized by infrared and elemental analysis.The yttrium complexes were also characterized by NMR spectra.The synthesized dinuclear rare earth metal hydrocarbyl complexes as catalysts to catalyze the hydrosilylation of internal alkynes with silanes were studied.Studies have shown that these complex exhibits good very good activity and regioselectivity and stereoselectivity in catalyzing the reaction of internal alkynes with silanes.The effects of metal center,reaction temperature,time and other factors on the catalytic reaction were studied.