Pd-PEPPSI Catalyzed Dehydrogenative Oxidation of Alcohols to Carboxylic Acids: An Experimental and Theoretical Study

Gogoi, Bibekananda; Borgohain, Poly; Patra, Shanti Gopal; Borah, Biraj Jyoti; Das, Pankaj

doi:10.1021/acs.organomet.4c00154

Organometallics

2024

DOI: 10.1021/acs.organomet.4c00154

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Pd-PEPPSI Catalyzed Dehydrogenative Oxidation of Alcohols to Carboxylic Acids: An Experimental and Theoretical Study

Bibekananda Gogoi,

Poly Borgohain,

Shanti Gopal Patra

et al.

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DFT Investigation of the Mechanism of Methoxycarbonylation of Styrene by Palladium Chloride

Patra,

Saha,

Chattaraj

2024

Chemistry

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The alkoxycarbonylation of styrene by palladium chloride is studied employing the density functional theory (DFT). Initially, [PdCl3]– reacts with methanol to form the methoxy-bound intermediate, which undergoes β-hydride elimination to form the key intermediate [PdCl2H]–. Then, a 1,2-insertion reaction to styrene takes place to form linear and branched alkyl coordinated with the PdII. Then, CO coordination followed by a 1,1-insertion reaction leads to the formation of acyl intermediate. Next, the methanolysis leads to the formation of esters. Previous reports with other catalysts suggested the intermolecular/intramolecular transition state (TS) formation with a high activation barrier, and this step was the bottleneck. To the best of our knowledge, this is the first time we have considered a two-step mechanism for the alcoholysis of the ester formation mechanism. After coordination with the metal, the methanol undergoes oxidative addition to form the PdIV square pyramidal intermediate, followed by reductive elimination to form the ester with regeneration of the metal hydride active intermediate. Deeper insight into the nature of bonding at the TSs is obtained through energy decomposition with natural orbital for chemical valence (EDA-NOCV) and quantum theory of atoms in molecules (QTAIM).

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DFT Investigation of the Mechanism of Methoxycarbonylation of Styrene by Palladium Chloride

Patra,

Saha,

Chattaraj

2024

Chemistry

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Pd-PEPPSI Catalyzed Dehydrogenative Oxidation of Alcohols to Carboxylic Acids: An Experimental and Theoretical Study

Cited by 1 publication

References 84 publications

DFT Investigation of the Mechanism of Methoxycarbonylation of Styrene by Palladium Chloride

DFT Investigation of the Mechanism of Methoxycarbonylation of Styrene by Palladium Chloride

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