Synthesis of Five-coordinated Anionic Tin(Ⅳ) Complexes and Crystal Structure of (i-Pr)_2NH_2PhSn( μ~2-SCH_2COO)_2

摘要

Four new five-coordinated anionic tin（Ⅳ） complexes with a form of [R n NH 4- n ][PhSn（ μ 2-SCH2COO）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）2NH2] [PhSn（ μ 2-SCH2COO）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.