Mechanistic Studies of the Deoxydehydration of Polyols Catalyzed by a Mo(VI) Dioxo(pyridine-2,6-dicarboxylato) Complex
Mechanistic Studies of the Deoxydehydration of Polyols Catalyzed by a Mo(VI) Dioxo(pyridine-2,6-dicarboxylato) Complex
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Mo(VI)二氧代(吡啶-2,6-二羧基)配合物催化多元醇脱氧脱水的机理研究
DOI:
10.1021/acs.organomet.3c00001
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发表时间:
2023
期刊:
影响因子:
2.8
通讯作者:
Kilyanek, Stefan M.
中科院分区:
文献类型:
--
作者:
Tran, Randy;Canote, Cody A.;Kilyanek, Stefan M.
The need for renewable resources to displace petrochemical feedstocks is of great interest. Deoxydehydration (DODH) reduces biomass-derived polyols and diols to alkenes and dienes, possibly moving alkene production closer to carbon-neutral sources. We report the DODH of numerous aromatic, aliphatic, and biomass model diols by a dioxo-Mo(VI) catalyst, MoO2(pyridine-2,6-dicarboxylato)(HMPA). Optimal reaction conditions were found using PPh3and 1-phenyl-1,2-ethanediol yielding up to 93% styrene. Mechanistic studies usingin situinfrared spectroscopy support a biexponential kinetic regime where the rate constant of the rate-determining step is ∼5 × 10–5s–1. DFT calculations support the kinetic studies and suggest that the largest kinetic barrier is a proton transfer from the substrate to a metal–oxo bond during diolate formation.
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影响因子:
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通讯作者:
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影响因子:
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