Metal-Ligand Cooperativity in a Methandiide-Derived Iridium Carbene Complex.

Metal-Ligand Cooperativity in a Methandiide-Derived Iridium Carbene Complex.
复制标题

甲烷二化物衍生的铱卡宾配合物中的金属-配体协同作用

DOI:
10.1002/chem.201503936
复制
发表时间:
2016
期刊:
影响因子:
--
通讯作者:
V. H. Gessner
V. H. Gessner
中科院分区:
--
文献类型:
--
作者:
J. Weismann;R. Waterman;V. H. Gessner

文献摘要

参考文献

被引文献

相似文献

报道了甲二硫代二硫代化合物[Cp*IrL] [L=C(Ph2PS)(SO2Ph)](2)的合成、电子结构和反应性。光谱学和计算研究表明,尽管使用了晚过渡金属前体,但从甲烷到金属之间发生了充分的电荷转移,从而产生了稳定的亲核碳化合物,具有明显的金属-碳双键特征。这种铱配合物通过金属-配体配合激活一系列E−H键的潜力已经被测试过。这些研究表明,与先前报道的钌类似物相比,2的反应性存在明显差异。虽然在不同的酚衍生物中,试图激活O - H键会导致配体裂解,但已经完成了H - H和Si - H的激活以及异丙醇的脱氢。这些反应是由碳转化为烷基配体驱动的。与先前报道的钌碳系统相反,二氢活化已被发现以逐步机制进行,活化首先只发生在金属上。活化产物通过释放活化底物进一步反应生成环金属化配合物。在三苯基硅烷的情况下,环金属化可以由亚化学计量(即催化)量的硅烷诱导。
The synthesis, electronic structure, and reactivity of the first Group 9 carbene complex, [Cp*IrL] [L=C(Ph2PS)(SO2Ph)] (2), based on a dilithio methandiide are reported. Spectroscopic as well as computational studies have shown that, despite using a late transition‐metal precursor, sufficient charge transfer occurred from the methandiide to the metal, resulting in a stable, nucleophilic carbene species with pronounced metal‐carbon double‐bond character. The potential of this iridium complex in the activation of a series of E−H bonds by means of metal‐ligand cooperation has been tested. These studies have revealed distinct differences in the reactivity of2compared to a previously reported ruthenium analogue. Whereas attempts to activate the O−H bond in different phenol derivatives resulted in ligand cleavage, H−H and Si−H activation as well as dehydrogenation of isopropanol have been accomplished. These reactions are driven by the transformation of the carbene to an alkyl ligand. Contrary to a previously reported ruthenium carbene system, the dihydrogen activation has been found to proceed by a stepwise mechanism, with the activation first taking place solely at the metal. The activated products further reacted to afford a cyclometalated complex through liberation of the activated substrates. In the case of triphenylsilane, cyclometalation could thus be induced by a substoichiometric (i.e., catalytic) amount of silane.
第一个稳定的六价铬亚烷基配合物的合成和反应活性
DOI: --
发表时间: 1996
期刊:
影响因子: --
作者:
M. Coles;V. C. Gibson;W. Clegg;M. Elsegood;Peter A. Porrelli
通讯作者: Peter A. Porrelli
四面体与平面四配位碳:磺酰基取代的甲烷二化物
DOI: 10.1002/chem.201201369
发表时间: 2012
期刊: Chemistry
影响因子: --
作者:
P. Schröter;V. H. Gessner
通讯作者: V. H. Gessner
基于甲烷二胺的卡宾配合物的催化转移氢化:实验和计算研究
DOI: 10.1002/chem.201502116
发表时间: 2015
期刊: Chemistry
影响因子: --
作者:
J. Weismann;V. H. Gessner
通讯作者: V. H. Gessner
双(亚氨基膦)甲烷衍生物作为不寻常的钌卡宾配合物的前体:合成和DFT研究
DOI: --
发表时间: 2004
期刊:
影响因子: --
作者:
V. Cadierno;J. Díez;Joaquín García‐Álvarez;J. Gimeno;M. Calhorda;L. Veiros
通讯作者: L. Veiros
使用 HRuCl(PPh3)3 对烯烃进行化学计量氢化并形成邻位金属化钌 (II) 络合物
DOI: --
发表时间: 1974
期刊:
影响因子: --
作者:
B. James;L. D. Markham;Daniel K. W. Wang
通讯作者: Daniel K. W. Wang