17881-88-8Relevant articles and documents
Platinum Complexes with a Phosphino-Oxime/Oximate Ligand
Francos, Javier,Borge, Javier,Conejero, Salvador,Cadierno, Victorio
, p. 3176 - 3186 (2018)
The platinum(II) complex [PtCl2(COD)] (2; COD = 1,5-cyclooctadiene) reacted with 1 and 2 equiv. of 2-(diphenylphosphanyl)benzaldehyde oxime (1) to generate [PtCl2{κ2-(P,N)-2-Ph2PC6H4CH=NOH}] (3) and [Pt{κ2-(P,N)-2-Ph2PC6H4CH=NOH}2][Cl]2 (4), respectively. Deprotonation of the oxime hydroxyl group of 3 with Na2CO3 led to the selective formation of the dinuclear species (μ-O)-[PtCl{κ2-(P,N)-2-Ph2PC6H4CH=NO}]2 (5), while the related methylated derivative (μ-O)-[PtMe{κ2-(P,N)-2-Ph2PC6H4CH=NO}]2 (7) could be obtained from the direct reaction of [PtMe2(COD)] (6) with the phosphino-oxime ligand 1. In the case of 4, its treatment with Na2CO3 yielded complex [Pt({κ2-(P,N)-2-Ph2PC6H4CH=NO}2H)][Cl] (8), as a result of the deprotonation of only one of the OH groups of 4. On the other hand, contrary to what was observed with 6, no deprotonation of the oxime occurred in the reaction of [PtMe3I]4 (9) with 1, from which the mononuclear PtIV derivative fac-[PtIMe3{κ2-(P,N)-2-Ph2PC6H4CH=NOH}] (10) was isolated. The solid-state structures of compounds 3, 4, 7 and 10 were determined by X-ray crystallography. In addition, the potential of all the synthesized complexes as catalysts for the dehydrogenative coupling of hydrosilanes with alcohols is also briefly discussed.
Watanabe et al.
, p. 534 (1977)
Carbon Dioxide Reduction to Silyl-Protected Methanol Catalyzed by an Oxorhenium Pincer PNN Complex
Mazzotta,Xiong, Manxi,Abu-Omar, Mahdi M.
, p. 1688 - 1691 (2017)
Reaction of the rhenium pincer PNN complex [(PNN)Re(O)2][OTf] (2) with Me2PhSiH results in addition of Si-H across the ReO bond and a complex capable of reducing CO2 under mild conditions (ambient temperature and 100 psig) to silyl formate in 95% yield. Reaction of 2 with PhSiH3 yields a more reactive complex that catalytically reduces silyl formate to silyl formal (85% yield) and over longer times to silyl methanol (53% yield) with extrusion of siloxane. This system represents the unusual case of a high-valent metal oxo complex capable of reducing CO2 in a two-step, one-pot reaction to methanol.
Reductive oligomerization of carbon monoxide by rhodium-catalyzed reaction with hydrosilanes
Chatani,Shinohara,Ikeda,Murai
, p. 4303 - 4304 (1997)
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Hydrolysis and Methanolysis of Silanes Catalyzed by Iridium(III) Bis-N-Heterocyclic Carbene Complexes: Influence of the Wingtip Groups
Aliaga-Lavrijsen, Mélanie,Iglesias, Manuel,Cebollada, Andrea,Garcés, Karin,García, Nestor,Sanz Miguel, Pablo J.,Fernández-Alvarez, Francisco J.,Pérez-Torrente, Jesús J.,Oro, Luis A.
, p. 2378 - 2385 (2015)
New [Ir(CH3CN)2(I)2{κC,C′-bis(NHC)}]BF4 complexes featuring bis-NHC ligands with a methylene bridge and different N substitution (-CH2CH2CH2CH3 and -CH2CH2OPh) were synthesized. NMR studies and X-ray diffraction structures evidenced that the wingtip group -CH2CH2OPh presents a hemilabile behavior in solution, with the oxygen atom coordinating and dissociating at room temperature, which contrasts with the strong coordination of the ether functions in the complex [Ir(I)2{κC,C′,O,O′-bis(NHCOMe)}]BF4 (bis(NHCOMe) = methylenebis(N,N′-bis(2-methoxyethyl)imidazol-2-ylidene)), previously reported by us. These complexes proved to be efficient catalysts for the hydrolysis and methanolysis of silanes, affording molecular hydrogen and silyl alcohols or silyl ethers as the main reaction products in excellent yields. The hydrogen generation rates were very much dependent on the nature of the hydrosilane and the coordination ability of the wingtip group. The latter also played a key role in the recyclability of the catalytic system. (Chemical Equation Presented).
Charge Modified Porous Organic Polymer Stabilized Ultrasmall Platinum Nanoparticles for the Catalytic Dehydrogenative Coupling of Silanes with Alcohols
Chen, Chao,Cheng, Dan,Ding, Shunmin,Liang, Sanqi,Liu, Senqun,Ma, Xiaohua,Su, Tongtong,Wu, Shaohua,Zeng, Rong
, (2021/08/12)
Developing an ideal stabilizer to prevent the aggregation of nanoparticles is still a big challenge for the practical application of noble metal nanocatalysts. Herein, we develop a charge (NTf2?) modified porous organic polymer (POP-NTf2) to stabilize ultrasmall platinum nanoparticles. The catalyst is characterized and applied in the catalytic dehydrogenative coupling of silanes with alcohols. The catalyst exhibits excellent catalytic performance with highly dispersed ultrasmall platinum nanoparticles (ca. 2.22?nm). Moreover, the catalyst can be reused at least five times without any performance significant loss and Pt NPs aggregation. Graphic Abstract: [Figure not available: see fulltext.]
Swollen-induced in-situ encapsulation of chiral silver catalysts in cross-linked polysiloxane elastomers: Homogeneous reaction and heterogeneous separation
Yin, Guan-Wu,Wu, Shi-Lu,Yan, Jun-Hao,Zhang, Peng-Fei,Yang, Meng-Meng,Li, Li,Xu, Zheng,Yang, Ke-Fang,Xu, Li-Wen
, (2021/09/28)
The immobilization of molecular catalysts to fabricate heterogeneous catalysts for catalytic asymmetric transformations is extremely important and has attracted great attentions. Herein we developed a simple and new strategy for the heterogenization of ho
