F-2,4-Dimethyl-3-ethyl-3-pentyl and F-2,4-dimethyl-3-isopropyl-3-pentyl; stable tert-perfluoroalkyl radicals prepared by addition of fluorine or trifluoromethyl to a perfluoroalkene
作者:Kirby V. Scherer、Taizo Ono、Kouichi Yamanouchi、Richard Fernandez、Philip Henderson、Harold Goldwhite
DOI:10.1021/ja00289a042
日期:1985.2.1
and weak CIDNP effects can be expected. During the CIDNP experiment part of the H1, spectrum clearly shows emission whereas HI is obscured by the strong enhanced absorption of H4. We note further that a localized radical cation, 5a,b, although incompatible with the observed polarization, cannot be ruled out as a primary oxidation product, which rearranges rapidly (7 5 The formation of 3 requires a
可以预期小 hfc 和弱 CIDNP 效应。在 H1 的 CIDNP 实验部分,光谱清楚地显示了发射,而 HI 被 H4 的强烈增强吸收所掩盖。我们进一步注意到,局部自由基阳离子 5a,b 尽管与观察到的极化不相容,但不能排除它是快速重排的主要氧化产物(7 5 3 的形成需要 C4 和 C2 的再杂交。这结构可能允许两个烯丙基系统在 C 和 CzJ 或 Cz 和 C4 的 a 轨道之间有一些重叠。但是,只有以严重畸变为代价才能实现显着的重叠。自由基阳离子 3 是一个有趣的例子一个新兴的自由基阳离子家族,其结构与它们的母体分子完全不同。事实上,自由基阳离子类似于相应热异构化的过渡态几何形状。这些自由基阳离子的详细讨论正在准备中。s) 双烯丙基,共振稳定 3.