Crystalline binuclear cis- and trans-chlorotin(II) amides [Sn(µ-Cl)(NR2)]2, the cis-1a ⇌trans-1b isomerisation for [NR2= NCMe2(CH2)3CMe2], and the X-ray structures of 1a and of trans-[Sn(µ-Cl){N(SiMe3)2}]2
- 1 January 1991
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 18,p. 1302-1303
- https://doi.org/10.1039/c39910001302
Abstract
Crystalline binuclear chlorotin(II) amides [Sn(µ-Cl)(NR2)]2 have been X-ray characterised as cis-[NR2= [graphic omitted]Me2, 1a] and trans-(R = SiMe3, 2b) conformers [Cl–Sn–Cl′= 78.53(4)1a or 81.33(4)°2b, Sn–Cl–Sn′ 100.91(4)1a or 98.67(4)°2b, 2.74 1a or 2.67 Å2b]; a solution of 1 in toluene undergoes rapid cis⇌trans exchange at ambient temperature, but distinct cis-1a and trans-1b forms coexist below 192 K (119Sn NMR spectroscopy and line-shape analysis) and evidence is presented for an intramolecular mechanism for this exchange.Keywords
This publication has 8 references indexed in Scilit:
- Edge inversion in tricoordinated main group IV anionsHeteroatom Chemistry, 1991
- Singly bridged arrangements on Group 14 X2H4 potential surfacesJournal of the American Chemical Society, 1991
- Double bonds and bridged structures in the heavier analogs of ethyleneJournal of the American Chemical Society, 1990
- Nature of the tin-tin double bond as studied by solid-state and solution nuclear magnetic resonanceJournal of the American Chemical Society, 1987
- Subvalent Group 4B metal alkyls and amides. Part 9. Germanium and tin alkene analogues, the dimetallenes M2R4[M = Ge or Sn, R = CH(SiMe3)2]: X-ray structures, molecular orbital calculations for M2H4, and trends in the series M2R′4[M = C, Si, Ge, or Sn; R′= R, Ph, C6H2Me3-2,4,6, or C6H3Et2-2,6]J. Chem. Soc., Dalton Trans., 1986
- 119Sn-NMR ParametersPublished by Elsevier ,1985
- Monomeric bivalent group 4B metal dialkylamides M[NCMe2(CH2)3CMe2]2(M = Ge or Sn), and the structure of a gaseous disilylamide, Sn[N(SiMe3)2]2, by gas electron diffractionJournal of the Chemical Society, Chemical Communications, 1979
- Monomeric, volatile bivalent amides of group IVBelements, M(NR12)2and M(NR1R2)2(MGe, Sn, or Pb; R1Me3Si, R2Me3C)Journal of the Chemical Society, Chemical Communications, 1974