Compounds of germanium and tin XIV. Rearrangement of bis(2,4,6-tri-tert-butylphenyl)stannylene: synthesis and structure of a donor-free alkylarylstannylene-tungsten complex
作者:Manfred Weidenbruch、Artur Stilter、Josephin Schlaefke、Karl Peters、Hans Georg von Schnering
DOI:10.1016/0022-328x(95)05623-w
日期:1995.10
Bis(2,4,6-tri-tert-butylphenyl)stannylene R(2)Sn(2), rearranges in solution to the sterically less crowded alkylarylstannylene RR'Sn (3), R' = CH2-C(CH3)(2)-3,5-tBu(2)C(6)H(3). Treatment of 3 with [(OC)(5)W(THF)] yields the donor-free tungsten stannylene complex [(OC)(5)W = SnRR'] (4). The molecular structure of 4 reveals a three-coordinate tin atom in a strictly planar environment and an acute CSnC angle of 91.5 degrees. Trapping reactions of 3 with selenium, 2,3-dimethylbutadiene, and 3,5-di-tert-butyl-artho-benzoquinone furnish the 1,3-diselenadistannetane and the [4 + 1]-cycloaddition products, respectively.