REACTION OF 1,3-DI-TERT-BUTYL-2,2-DIMETHYL-4,4-DICHLORO-1,3,2,4λ⁴-DIAZASILASTANNETIDINE WITH SILVER TRIFLUOROMETHANESULFONATE. THE CRYSTAL STRUCTURE OF POLYMERIC 1,3-DI-TERT-BUTYL-2,4-DIMETHYL-2,4-DITRIFLUOROMETHANESULFONATE-1,3,2,4λ⁵-DIAZASILASTANNETIDINE

Abstract

When 1,3-di-tert-butyl-2,2-dimethyl-4,4-dichloro-1,3,2,λ²-diazasilastannetidine (1) is allowed to react with the chloride abstracting reagent AgCF₃SO₃ the chlorides are displaced by triflates forming 2. At the same time a rearrangement in the molecule takes place, one of the methyl groups on silicon migrating to tin in exchange of a triflate. In the solid the new compound 2 is a coordination polymer with trigonal bi-pyramidal tin centers, which exhibit quite unusual short Sn—N bonds in the axial plane (2.005 Å) [X-ray structure determination, space group P2_/l/n, a = 10.199(6)Å, b = 13.532(9)Å, c = 17.641(9)Å, β = 99.13(9)°, Z = 4].

Key Words:

• Tin
• low coordinate
• possible multiple bonding
• X-ray