The structural behaviour of 2,2-functionally disubstituted triorganotin chlorides
摘要:
A series of 13 2,2-difunctional triorganotin chlorides of the general formula Me(2)(Cl)SnCH2CH(X=O)Y=O(X=O, Y=O=P(O)R(2), C(O)R; R=(OPr)-Pr-i, Oet, Ph) has been synthesized by chlorination of the corresponding tetraorganotin compounds Me(3)SnCH(2)CH(X=O)Y=O with HCl in diethyl ether. The crystal structure determination of Me(2)(Cl)SnCH2[P(O)((OPr)-Pr-i)(2)](2) (VIII), IR spectroscopic data and NMR studies reveal, for the title compounds, molecular structures in which the tin atom, approaches a trigonal-bipyramidal pentacoordinated ligand arrangement as result of an intramolecular Sn ... O interaction of one of the two functional groups X=O or Y=O respectively, In solution the compounds undergo a ligand exchange process which has been investigated by NMR. A mechanism of this process is suggested.
A series of 13 2,2-difunctional triorganotin chlorides of the general formula Me(2)(Cl)SnCH2CH(X=O)Y=O(X=O, Y=O=P(O)R(2), C(O)R; R=(OPr)-Pr-i, Oet, Ph) has been synthesized by chlorination of the corresponding tetraorganotin compounds Me(3)SnCH(2)CH(X=O)Y=O with HCl in diethyl ether. The crystal structure determination of Me(2)(Cl)SnCH2[P(O)((OPr)-Pr-i)(2)](2) (VIII), IR spectroscopic data and NMR studies reveal, for the title compounds, molecular structures in which the tin atom, approaches a trigonal-bipyramidal pentacoordinated ligand arrangement as result of an intramolecular Sn ... O interaction of one of the two functional groups X=O or Y=O respectively, In solution the compounds undergo a ligand exchange process which has been investigated by NMR. A mechanism of this process is suggested.