Role of a Noninnocent Pincer Ligand in the Activation of CO2 at (PNN)Ru(H)(CO)

This communication describes the activation of CO2 at the Ru pincer complex (PNN)­Ru­(H)­(CO) (PNN = 6-(di-tert-butylphosphinomethylene)-2-(N,N-diethylaminomethyl)-1,6-dihydropyridine). The reaction proceeds to completion within minutes at room temperature to form a C–C bond between the pincer ligand and the electrophilic carbon atom of CO2. The characterization of both the kinetic and thermodynamic products of CO2 activation and the reversibility of this C–C bond formation are discussed.

本通讯报道了Ru钳形配合物（PNN）-Ru-(H)-(CO)（其中PNN配体为6-(二叔丁基膦亚甲基)-2-(N,N-二乙氨基甲基)-1,6-二氢吡啶）对二氧化碳（CO₂）的活化反应。该反应可在室温下数分钟内完全进行，于钳形配体与CO₂的亲电碳原子之间形成碳碳键。本文还讨论了CO₂活化过程中动力学产物与热力学产物的表征，以及该碳碳键形成反应的可逆性。