REACTION OF BIS(DIALKYLAMINO)TIN(II) COMPOUNDS WITH TRIFLUOROBORANE

The reactions of the bis(dialkylamino)tin(II) compounds, Sn(NR2)2 (R = CH3, C2H3), with trifluoroborane have been investigated. A tensimetric titration of Sn(N(CH3)2)2 with BF3 indicated formation of a 1:3 adduct, which was confirmed by elemental analyses. Multinuclear NMR spectra of the product showed two boron environments, one with BF3 coordinated to the omino nitrogens and the other with BF3 coordinated to tin. Spectra of solutions containing 1:1 and 1:2 donor to acceptor ratios suggested that the initial site of BF3 coordination was the tin atom and subsequent coordination occurred at the amino nitrogens. A 119Sn Mössbauer spectrum of the air sensitive 1:1 adduct showed larger differences in isomer shift and quadrupole splitting parameters compared to those of the parent amino tin(II) compound. © 1979.