Expanding the Chemistry of Cationic N-Heterocyclic Carbenes: Alternative Synthesis, Reactivity, and Coordination Chemistry
Expanding the Chemistry of Cationic N-Heterocyclic Carbenes: Alternative Synthesis, Reactivity, and Coordination Chemistry
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DOI：
10.1002/chem.201103707
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发表时间：
2012-05-01
影响因子：
4.3
通讯作者：
Ganter, Christian
中科院分区：
文献类型：
--
作者：
Hildebrandt, Bjoern;Raub, Stephan;Ganter, Christian
通过将阳离子五甲基环戊二烯基钌（[RuCp*]+）片段连接到金属配位的苯并咪唑-2-亚基配体上，发展了一种新的合成阳离子N-杂环卡宾配体2配合物的方法。通过实验和理论研究，详细研究了阳离子卡宾的配位化学、空间和电子性质。测定了三种卡宾缩甲醛配合物的X-射线结构。阳离子配体2相对于相关中性卡宾是较差的总体电子供体，这从循环伏安法（CV）和IR测量中是明显的。
A new synthetic route to complexes of the cationic N-heterocyclic carbene ligand 2 has been developed by the attachment of a cationic pentamethylcyclopentadienylruthenium ([RuCp*]+) fragment to a metal-coordinated benzimidazol-2-ylidene ligand. The coordination chemistry and the steric and electronic properties of the cationic carbene were investigated in detail by experimental and theoretical methods. X-ray structures of three carbenemetal complexes were determined. The cationic ligand 2 is a poorer overall electron donor relative to the related neutral carbene, which is evident from cyclic voltammetry (CV) and IR measurements.