F-19 NMR-STUDY OF THE POLARIZATION DIRECTION AND POLARITY OF TIN-HYDROGEN AND TIN-TRANSITION METAL BONDS IN TRIS(4-FLUOROPHENYL)STANNANE AND ITS ORGANOMETALLIC DERIVATIVES

A series of (4-FC6H4)(3)SnML(n) compounds containing tin-transition me tal bonds were synthesized. Based on F-19 NMR data for these compounds , (4-FC6H4)(3)SnSn(C6H4F-4)(3), and (4-FC6H4)(3)SnH, conclusions were drawn concerning the polarization direction and relative polarity of t he tin-hydrogen and tin-metal bonds in the above compounds and in the hydrides L(n)MH and R(3)SnH. It was found that, in the general case, t he group electronegativities of the L(n)M groups do not vary similarly to the electronegativities of the central metal atoms.