Steric effects on acetate-assisted cyclometallation of meta-substituted N-phenyl and N-benzyl imidazolium salts at [MCl2Cp*]2 (M = Ir, Rh).
Steric effects on acetate-assisted cyclometallation of meta-substituted N-phenyl and N-benzyl imidazolium salts at [MCl2Cp*]2 (M = Ir, Rh).
复制标题
间位取代的 N-苯基和 N-苄基咪唑鎓盐在 [MCl2Cp*]2 (M = Ir, Rh) 上的乙酸辅助环金属化的空间效应。
DOI：
10.1039/d1dt02677a
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Davies DL
中科院分区：
文献类型：
--
作者：
Davies DL
间位取代的N-苯基，N′-甲基和N-苄基，N′-甲基咪唑鎓盐进行乙酸盐辅助的环化反应，以提供邻位和帕拉取代的环化络合物的混合物。取代基对异构体比例的影响进行了讨论;空间效应是更重要的6元环衍生自N-苄基咪唑盐比5元环的N-苯基盐。并与其他常见的导向基团的空间效应进行了比较。
meta-Substituted N-phenyl,N′-methyl and N-benzyl,N′-methyl imidazolium salts undergo acetate-assisted cyclometallation to provide mixtures of ortho and para substituted cyclometallated complexes. The effect of the substituents on the isomer ratios is discussed; steric effects are more important in the 6-membered rings derived from the N-benzyl imidazolium salts than 5-membered rings from the N-phenyl salts. Comparisons are made to steric effects with some other common directing groups.