Siloxide Podand Ligand as a Scaffold for Molybdenum-Catalyzed Alkyne Metathesis and Isolation of a Dynamic Metallatetrahedrane Intermediate
Copyright © 2019 American Chemical Society. Triphenylsiloxide is one of the most successful ancillary ligands for Mo(VI)-alkyne metathesis catalysts. It was proposed that flexible siloxide ligands allow Mo-O-Si bond angles to modulate the electrophilicity of MoC and thereby promote the catalysis. Introduction of a siloxide podand ligand allowed elucidation of the effect of ligand flexibility and Mo-O-Si angles on the electrophilicity of MoC. It also allowed for the isolation of a rare metallatetrahedrane of Mo(VI) which was found to be dynamic in solution.
Publication Source (Journal or Book title)
Thompson, R., Rotella, M., Du, P., Zhou, X., Fronczek, F., Kumar, R., Gutierrez, O., & Lee, S. (2019). Siloxide Podand Ligand as a Scaffold for Molybdenum-Catalyzed Alkyne Metathesis and Isolation of a Dynamic Metallatetrahedrane Intermediate. Organometallics https://doi.org/10.1021/acs.organomet.9b00430