Reversible and Irreversible Higher-Order Cycloaddition Reactions of Polyolefins with a Multiple-Bonded Heavier Group 13 Alkene Analogue: Contrasting the Behavior of Systems with π–π, π–π*, and π–n<sub>+</sub> Frontier Molecular Orbital Symmetry
作者:Christine A. Caputo、Jing-Dong Guo、Shigeru Nagase、James C. Fettinger、Philip P. Power
DOI:10.1021/ja301247h
日期:2012.4.25
heavier group 14 species Ar(iPr(4))EEAr(iPr(4)) (E = Ge, Sn), which give very different product structures. We discuss several mechanistic possibilities, including radical- and non-radical-mediated cyclization pathways. These mechanisms are consistent with the improved energetic accessibility of the LUMO of the heavier group 13 element multiple bond in comparison with that of a simple alkene or alkyne
较重的第 13 族元素烯烃类似物,双镓烯 Ar(iPr(4))GaGaAr(iPr(4)) (1) [Ar(iPr(4)) = C(6)H(3)-2,6-(C (6)H(3)-2,6-(i)Pr(2))(2)],已显示在 [n + 2] (n = 6, 4, 2 + 2) 环加成反应中很容易反应与降冰片二烯和四环烷、1,3,5,7-环辛四烯、1,3-环戊二烯和 1,3,5-环庚三烯形成重元素三环环烷类 Ar(iPr(4))Ga(C(7)H) (8))GaAr(iPr(4)) (2),伪逆三明治 Ar(iPr(4))Ga(C(8)H(8))GaAr(iPr(4)) (3, 3(iso)) , 和多环化合物 Ar(iPr(4))Ga(C(5)H(6))GaAr(iPr(4)) (4) 和 Ar(iPr(4))Ga(C(7)H(8) )GaAr(iPr(4)) (5, 5(iso)),分别在环境