Home Products Cited in Publications Worldwide A σ-Poor, π-Rich Pyridonate Pincer Ligand Designed To Enhance C–H Oxidative Addition at Platinum Group Metals: Experimental and Computational Studies
Organometallics,2024,43(15):1630-1639.
Lew, Maria JH; Kelber, Jacob A; Van Vleet, Mary J; Johnson, Adam R; Jarvo, Elizabeth R; Williams, Nancy SB
DOI:10.1021/acs.organomet.4c00102
A strong π-donor, weak σ-donor pyridonate pincer complex of platinum is reported, a rare but important electronic ligand structure for promoting C-H activation in late transition metals. Protonation of the complex 2,6-bis(diethylaminomethyl)-4- pyridonate platinum(II) methyl occurs initially at oxygen, with a second proton equivalent affording methane. Methyl triflate similarly methylates initially with oxygen and then platinum. A computational study indicates that this terdentate pyridonate pincer greatly enhances the ability of late transition metals to cleave the C-H bond of methane compared to a classic NCN pincer. With iridium bound to this π-donor pincer, the oxidative addition of methane is computationally predicted to be thermodynamically favorable.