Category: 338800-13-8

Feibelman, Peter J. published the artcileWhat Limits Turnover Number in NH₃ Synthesis on a PNP Pincer Molecule?, SDS of cas: 338800-13-8, the publication is Comments on Inorganic Chemistry (2014), 34(1-2), 3-16, database is CAplus.

Abiol. NH₃ synthesis under mild conditions on a PNP [=2,6-bis(di-tert-butyl-phosphinomethyl)pyridine] pincer chelating an Mo(N₂)₃ group has been reported and attributed to a catalytic cycle wherein only the equatorial N₂ is reduced. The present calculations suggest that reduction of axial N₂ ligands was the reason the cycle ended after production of 23 equivalent of NH₃. NH₃ detachment from axial NNH₃ initiates a terminal reaction pathway by leaving an axial nitrido N behind on the Mo. The trans influence of the strong axial nitride bond causes the second axial N₂ to detach from the Mo, with N-Mo-N₂ remaining as a non-catalytic, pincer-chelated group.

Comments on Inorganic Chemistry published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, SDS of cas: 338800-13-8.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Tanaka, Ryo published the artcileCatalytic Hydrogenation of Carbon Dioxide Using Ir(III)-Pincer Complexes, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, the publication is Journal of the American Chemical Society (2009), 131(40), 14168-14169, database is CAplus and MEDLINE.

Catalytic hydrogenation of carbon dioxide in aqueous potassium hydroxide was performed using a newly synthesized isopropyl-substituted PNP-pincer iridium trihydride complex as catalyst. Potassium formate was obtained with turnover number up to 3,500,000 and turnover frequency of 150,000 h^-1.

Journal of the American Chemical Society published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C7H13BrSi, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Li, Wei published the artcileHighly efficient hydrogenation of biomass-derived levulinic acid to γ-valerolactone catalyzed by iridium pincer complexes, Application In Synthesis of 338800-13-8, the publication is Green Chemistry (2012), 14(9), 2388-2390, database is CAplus.

A highly efficient catalytic method for hydrogenation of biomass-derived levulinic acid has been developed and the iridium trihydride complexes of PNP pincer ligands were found to be extremely active catalysts for this transformation, providing γ-valerolactone in high yields with TONs as high as 71 000.

Green Chemistry published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Application In Synthesis of 338800-13-8.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Feibelman, Peter J. published the artcileWhat Limits Turnover Number in NH₃ Synthesis on a PNP Pincer Molecule?, SDS of cas: 338800-13-8, the publication is Comments on Inorganic Chemistry (2014), 34(1-2), 3-16, database is CAplus.

Abiol. NH₃ synthesis under mild conditions on a PNP [=2,6-bis(di-tert-butyl-phosphinomethyl)pyridine] pincer chelating an Mo(N₂)₃ group has been reported and attributed to a catalytic cycle wherein only the equatorial N₂ is reduced. The present calculations suggest that reduction of axial N₂ ligands was the reason the cycle ended after production of 23 equivalent of NH₃. NH₃ detachment from axial NNH₃ initiates a terminal reaction pathway by leaving an axial nitrido N behind on the Mo. The trans influence of the strong axial nitride bond causes the second axial N₂ to detach from the Mo, with N-Mo-N₂ remaining as a non-catalytic, pincer-chelated group.

Comments on Inorganic Chemistry published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, SDS of cas: 338800-13-8.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Tanaka, Ryo published the artcileCatalytic Hydrogenation of Carbon Dioxide Using Ir(III)-Pincer Complexes, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, the publication is Journal of the American Chemical Society (2009), 131(40), 14168-14169, database is CAplus and MEDLINE.

Catalytic hydrogenation of carbon dioxide in aqueous potassium hydroxide was performed using a newly synthesized isopropyl-substituted PNP-pincer iridium trihydride complex as catalyst. Potassium formate was obtained with turnover number up to 3,500,000 and turnover frequency of 150,000 h^-1.

Journal of the American Chemical Society published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C7H13BrSi, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Li, Wei published the artcileHighly efficient hydrogenation of biomass-derived levulinic acid to γ-valerolactone catalyzed by iridium pincer complexes, Application In Synthesis of 338800-13-8, the publication is Green Chemistry (2012), 14(9), 2388-2390, database is CAplus.

A highly efficient catalytic method for hydrogenation of biomass-derived levulinic acid has been developed and the iridium trihydride complexes of PNP pincer ligands were found to be extremely active catalysts for this transformation, providing γ-valerolactone in high yields with TONs as high as 71 000.

Green Chemistry published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Application In Synthesis of 338800-13-8.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Prechtl, Martin H. G. published the artcileDirect coupling of alcohols to form esters and amides with evolution of H₂ using in situ formed ruthenium catalysts, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, the publication is Catalysis Science & Technology (2012), 2(10), 2039-2042, database is CAplus.

A simple approach for the catalytic conversion of primary alcs. into their corresponding esters and amides, with evolution of H₂ gas using in situ formed ruthenium PNP- and PNN-pincer catalysts (I; X = NEt₂,P-tert-Bu₂), is presented. The evaluation showed conversions for the esterification with turnover numbers as high as 4300, and >400 for the amidation.

Catalysis Science & Technology published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Liu, Xin published the artcileSelective Construction of C-C and C=C Bonds by Manganese Catalyzed Coupling of Alcohols with Phosphorus Ylides, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, the publication is Advanced Synthesis & Catalysis (2021), 363(4), 1096-1104, database is CAplus.

The manganese complex e.g., I catalyzed coupling of alcs. ROH (R = benzyl, cyclohexyl, furan-2-ylmethyl, etc.) with phosphorus ylides R¹ = P(C₆H₅)₃ (I) [R¹ = H, C(O)OEt, (morpholin-4-yl)carbonyl, benzoyl, etc.] were reported. The selectivity in the coupling of primary alcs. with phosphorus ylides (I) to form carbon-carbon single (C-C) and carbon-carbon double (C=C) bonds can be controlled by the ligands. In the conversion of more challenging secondary alcs. with phosphorus ylides (I), the selectivity towards the formation of C-C vs is obtained. C=C bonds can be controlled by the reaction conditions, namely the amount of base. The scope and limitations of the coupling reactions were thoroughly evaluated by the conversion of 21 alcs. and 15 ylides. Notably, compared to existing methods, which are based on precious metal complexes as catalysts, the present catalytic system is based on earth abundant manganese catalysts e.g., I. The reaction can also be performed in a sequential one-pot reaction generating the phosphorus ylide in situ followed manganese catalyzed C-C and C=C bond formation. Mechanistic studies suggest that the C-C bond was generated via a borrowing hydrogen pathway and the C=C bond formation followed an acceptorless dehydrogenative coupling pathway.

Advanced Synthesis & Catalysis published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Chaplin, Adrian B. published the artcile[Rh{NC₅H₃-2,6-(CH₂PtBu₂)₂}(PCy₃)][BArF₄]: A Latent Low-Coordinate Rhodium(I) PNP Pincer Compound, Application In Synthesis of 338800-13-8, the publication is Organometallics (2011), 30(16), 4466-4469, database is CAplus.

An expedient new route to the cationic [(PNP^tBu)Rh(L)]⁺ metal fragments (PNP^tBu = κ³-NC₅H₃-2,6-(CH₂P ^tBu₂)₂; L = CO, acetone, ethene, MeCN, N₂) by the synthesis of, then substitution of PCy₃ in, [(PNP^tBu)Rh(PCy₃)][BAr^F₄] is reported. This synthetic route also allows for the synthesis of the new dihydrogen complex [(PNP^tBu)Rh(H₂)][BAr^F₄]. [(PNP^R)Rh(PCy₃)][BAr^F₄] (R = Ph, Cy, Mes) are also reported, in which the PCy₃ ligand is more tightly bound to the metal center.

Organometallics published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Application In Synthesis of 338800-13-8.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem

Lee, Kyounghoon published the artcileLigand K-edge XAS, DFT, and TDDFT analysis of pincer linker variations in Rh(I) PNP complexes: reactivity insights from electronic structure, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, the publication is Dalton Transactions (2016), 45(24), 9774-9785, database is CAplus and MEDLINE.

Here we report P K-edge, Cl K-edge, and Rh L₃-edge X-ray absorption spectroscopy (XAS) data for Rh[C₅H₃N-2,6-(XP^tBu₂)₂]Cl, where X = O (^tBuPONOP; 1) or CH₂ (^tBuPNP; 2), I and II, resp. Solid-state XAS data for 1 and 2 were compared to d. functional theory (DFT) and time-dependent d. functional theory (TDDFT) calculations to identify how changing the PNP pincer linker from O to CH₂ affected electronic structure and bonding at Rh(I). Pronounced differences in XAS peak intensities and energies were observed The P K-edge XAS data revealed a large increase in Rh 4d_x2_-y2 and P 3p orbital-mixing (Rh-P σ*) in 1 compared to 2, and pronounced transition energy variations reflected marked differences in orbital energies and compositions By comparison, the Cl K-edge XAS data revealed only subtle differences in Rh-Cl covalency, although larger splitting between the Rh-Cl π* and σ* transitions was observed in 2. Anal. of the occupied MOs from DFT (HOMO, HOMO-1, HOMO-2, and HOMO-3) and comparison to the unoccupied MOs involved in XAS revealed a relatively uniform energy increase (ca. 0.3-0.5 eV) for all five 4d-derived MOs in Rh(^tBuPNP)Cl (2) compared to Rh(^tBuPONOP)Cl (1). The energy shift was relatively invariant with respect to differences in orbital symmetry, bonding type (σ or π), and orbital mixing, which suggested that the increase could be attributed to electrostatic effects. The change in d-orbital energies are consistent with known reactivity differences of Rh(^tBuPONOP)⁺ and Rh(^tBuPNP)⁺ towards CO, H₂, and CH₂Cl₂, and are explained here by considering how d-orbital energies affect covalent L â†?M σ bonding and M â†?L π backbonding.

Dalton Transactions published new progress about 338800-13-8. 338800-13-8 belongs to pyridine-derivatives, auxiliary class Bis-phosphine Ligands, name is 2,6-Bis((di-tert-butylphosphino)methyl)pyridine, and the molecular formula is C23H43NP2, Recommanded Product: 2,6-Bis((di-tert-butylphosphino)methyl)pyridine.

Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem