Isolation and characterization of an iodide bridged dimeric palladium complex in carbonylation of methanol

Tonde, Sunil S.; Kelkar, Ashutosh A.; Bhadbhade, Mohan M.; Chaudhari, Raghunath V.

doi:10.1016/j.jorganchem.2005.01.010

Cited by 18 publications

(10 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…and showed that it converts to [PdI 3 (CO)]under CO pressure. 36 The same species may be present during the oxidative carbonylation of amines when no phosphorus or nitrogen ligands are present. The formation of other intermediates has only been studied in the presence of such ligands.…”

Section: General Reaction Pathway and Type Of Catalytic Systemsmentioning

confidence: 99%

Away from phosgene: reductive carbonylation of nitroarenes and oxidative carbonylation of amines, understanding the mechanism to improve performance

Ragaini

2009

Dalton Trans.

114

View full text Add to dashboard Cite

Recent progress, with some emphasis on the author's own work, on the understanding of the mechanism of the reductive carbonylation of nitroarenes and of the oxidative carbonylation of amines is discussed, highlighting the close connection between the two reactions and trying to unify scattered data in the literature. Isocyanates, carbamates and ureas can be obtained by either procedure, without the need for the use of the toxic and corrosive phosgene.

show abstract

Section: General Reaction Pathway and Type Of Catalytic Systemsmentioning

confidence: 99%

Away from phosgene: reductive carbonylation of nitroarenes and oxidative carbonylation of amines, understanding the mechanism to improve performance

Ragaini

2009

Dalton Trans.

114

View full text Add to dashboard Cite

show abstract

“…This latter specie was obtained, sometimes unintentionally, in other cases reported in the literature. 23,24 (PhHN) 2 DTLI 3 and Mo 2 DTLI 3 were also reacted with gold powder in order to study the leaching reaction and to compare the resulting complexes with those produced by Pd leaching. Scheme 3 summarizes the leaching conditions and products.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Ionic Couple-Driven Palladium Leaching by Organic Triiodide Solutions

Cuscusa

Rigoldi

Artizzu

et al. 2017

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Pd dissolution capabilities of a variety of organic triiodides (OrgI3) in organic solvent, where Org+ = 3,5-bis(phenylamino)-1,2-dithiolylium [(PhHN)2DTL+], 3,5-bis(morpholino)-1,2-dithiolylium (Mo2DTL+); tetrabuthylammonium (TBA+); and tetraphenylphosphonium (Ph4P+), toward the crude metal and model-spent three-way catalyst (TWC), are described here. Enhanced Pd-leaching yields from TWC were obtained using OrgI3 solutions (up to 98%) in spite of the fully inorganic KI3 one (38%) in the same mild conditions. The reaction products were isolated and characterized as Org2[Pd2I6]. Crystallographic and DFT studies highlighted the presence of several ion-pair secondary interactions in the products, which can explain the improved effectiveness of the Pd etching by OrgI3. For comparison purposes, the gold leaching by using R2DTLI3 and the obtained Au complexes were investigated. Preliminary results addressed to recover the metal and the reagents from the etching product showed that (PhHN)2DTLI3 is the most promising reagent to improve sustainability in the whole process

show abstract

“…This was as expected as the dimer -under CO pressure. 35 Though we have isolated the substrate coordinated rhodium species (designated as complex 3), we are not sure of its real existence or formation in the high CO pressure, high temperature catalytic run in DMF solution. Since nitrosobenzene and phenyl nitrine intermediates have been predicted for the palladium and ruthenium complexes by various groups, 2 we speculated Scheme 2 for the initial stages of our catalytic carbonylation reactions.…”

Section: Resultsmentioning

confidence: 99%

Catalytic Activity of Supported Rhodium(I) Complex for the Carbonylation of Nitrobenzene: Mechanism for Carbamate Formation

Kim¹,

Kim²,

Cheong³

et al. 2010

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

The investigation of the catalytic activity of supported rhodium(I) complex [Rh(P-S)(CO)2] (P-S; polymer anchored salicylic acid) toward the reductive carbonylation of nitrobenzene in DMF medium has been reported. Use of basic cocatalysts in the reaction medium enhanced the percentage of more useful phenyl carbamates. Spectroscopic studies indicate that the reaction proceeds through a dimer species [Rh(HS)(CO)(C(O)OCH3)(µ-OCH3)]2 and phenyl isocyanate is formed as an intermediate. A plausible reaction mechanism based on the identification of reactive intermediates from the soluble rhodium variety has been proposed for the carbonylation process.

show abstract

Isolation and characterization of an iodide bridged dimeric palladium complex in carbonylation of methanol

Cited by 18 publications

References 8 publications

Away from phosgene: reductive carbonylation of nitroarenes and oxidative carbonylation of amines, understanding the mechanism to improve performance

Away from phosgene: reductive carbonylation of nitroarenes and oxidative carbonylation of amines, understanding the mechanism to improve performance

Ionic Couple-Driven Palladium Leaching by Organic Triiodide Solutions

Catalytic Activity of Supported Rhodium(I) Complex for the Carbonylation of Nitrobenzene: Mechanism for Carbamate Formation

Contact Info

Product

Resources

About