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Activation of Dichloromethane by a Bis-NHC Cp*Ru Complex: Formation of a Pentamethyl(chloromethyl)cyclopentadiene Ligand
Organometallics ( IF 2.5 ) Pub Date : 2021-07-21 , DOI: 10.1021/acs.organomet.1c00340
Andrés G. Algarra 1 , Juan Carlos G. Galindo 2 , M. Carmen Puerta 1 , Pedro Valerga 1 , Manuel Jiménez-Tenorio 1
Affiliation  

The dinitrogen complex [{Cp*Ru(L)}2(μ-N2)][BPh4]2 (L = bis(3-methylimidazol-2-ylidene) reacts with dichloromethane at room temperature, furnishing the diene derivative [Ru(η4, κ1-Cl-C5Me5CH2Cl)Cl(L)][BPh4] as result of CH2Cl2 oxidative addition and subsequent migration of the chloromethyl group into the Cp* ring. Mechanistic insight provided by DFT computations indicate that while the cleavage of the C–Cl bond is not thermodynamically favored, the subsequent migration step is largely exergonic and thus provides the driving force for the formation of the observed product.

中文翻译:

双-NHC Cp*Ru 络合物活化二氯甲烷:五甲基(氯甲基)环戊二烯配体的形成

二氮络合物 [{Cp*Ru( L )} 2 (μ-N 2 )][BPh 4 ] 2 ( L = 双(3-甲基咪唑-2-亚基) 在室温下与二氯甲烷反应,得到二烯衍生物 [ Ru(η 4 , κ 1 - Cl -C 5 Me 5 CH 2 Cl)Cl(L)][BPh 4 ] 作为 CH 2 Cl 2 的结果氧化加成和随后的氯甲基迁移到 Cp* 环中。DFT 计算提供的机制洞察表明,虽然 C-Cl 键的裂解在热力学上不利,但随后的迁移步骤在很大程度上是外力的,因此为观察到的产物的形成提供了驱动力。
更新日期:2021-08-09
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