Four new five-coordinated anionic tin(Ⅳ) complexes with a form of [R_ n NH_ 4- n ][PhSn( μ 2-SCH_2COO)_2] were synthesized via the reaction of mercaptoacetic acid with phenyltin trichloride in the presence of dif...Four new five-coordinated anionic tin(Ⅳ) complexes with a form of [R_ n NH_ 4- n ][PhSn( μ 2-SCH_2COO)_2] were synthesized via the reaction of mercaptoacetic acid with phenyltin trichloride in the presence of different organic bases and characterized by means of IR, 1H NMR and MS spectroscopies. The crystal structure of [( i -Pr)_2NH_2] [PhSn( μ 2-SCH_2COO)_2] was determined by X-ray diffraction. In the crystal structure,the tin atom is five-coordinated and exists in trigonal bipyramid geometry with cell parameters a =1.1766(11) nm, b =1.3144(14) nm, c =1.3336(15) nm,β =90° and Z =4.展开更多
Chelate tetra(acetylacetonato) tin(Ⅳ) was prepared and used as catalyst for polytrimethylene terephthalate synthesis.It exhibited higher catalytic activity than tetrabutyl titanate,butyltinhydroxide oxide and dibutyl...Chelate tetra(acetylacetonato) tin(Ⅳ) was prepared and used as catalyst for polytrimethylene terephthalate synthesis.It exhibited higher catalytic activity than tetrabutyl titanate,butyltinhydroxide oxide and dibutyltin oxide.Decrease in reaction time, content of terminal carboxyl group,color intensity and increase in intrinsic viscosity were observed.The unique molecular structure can be considered as factor remarkably improving the catalytic activity of tetra(acetylacetonato) tin(Ⅳ).展开更多
文摘Four new five-coordinated anionic tin(Ⅳ) complexes with a form of [R_ n NH_ 4- n ][PhSn( μ 2-SCH_2COO)_2] were synthesized via the reaction of mercaptoacetic acid with phenyltin trichloride in the presence of different organic bases and characterized by means of IR, 1H NMR and MS spectroscopies. The crystal structure of [( i -Pr)_2NH_2] [PhSn( μ 2-SCH_2COO)_2] was determined by X-ray diffraction. In the crystal structure,the tin atom is five-coordinated and exists in trigonal bipyramid geometry with cell parameters a =1.1766(11) nm, b =1.3144(14) nm, c =1.3336(15) nm,β =90° and Z =4.
基金the National High Technology Research and Development Program of China(No. 2003AA321010)the Innovation Research Fund of Graduate University,Chinese Academy of Sciences(2006)
文摘Chelate tetra(acetylacetonato) tin(Ⅳ) was prepared and used as catalyst for polytrimethylene terephthalate synthesis.It exhibited higher catalytic activity than tetrabutyl titanate,butyltinhydroxide oxide and dibutyltin oxide.Decrease in reaction time, content of terminal carboxyl group,color intensity and increase in intrinsic viscosity were observed.The unique molecular structure can be considered as factor remarkably improving the catalytic activity of tetra(acetylacetonato) tin(Ⅳ).