Synthesis of a Stable Disilyne Bisphosphine Adduct and Its Non-Metal- Mediated CO2 Reduction to CO

摘要

Since the first synthesis of stable disilynes I, with a silicon-silicon triple bond, independently by the groups of Sekiguchi and Wiberg, the unique chemical behavior of these species has been attracting much attention. Structural determinations revealed that I presents a trans-bent structure resulting in two nondegenerate Si-Si π molecular orbitals and particularly a weak in-plane π bond with a lowest unoccupied molecular orbital that is low-lying in energy. As a consequence, the formation of bis(Lewis base) adducts II by the addition of two donating ligands is strongly exothermic.