Day: August 5, 2021

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene, molecular formula is C30H24P2. In a Article，once mentioned of 13991-08-7, SDS of cas: 13991-08-7

In the present work we obtained a series of NIR luminescent platinum(II) complexes with a pincer N^N^C ligand based on the conjugated {benzoimidazo[1,2-a]pyrazine} system with the [Pt(N^N^C)L]n+ structural motif (L = phosphine, alkynyl or pyridine-type ligands). We have also synthesized two complexes with bidentate phosphines that demonstrate different types of coordination: 1) as chelating ligand (in case of 1,2-bis(diphenylphosphino)benzene), that led to de-coordination of pyridine ring of N^N^C ligand and formation of a [Pt(N^C)dppb]+ complex; 2) as a bridging ligand (in case of bis(diphenylphosphino)methane) between two {Pt(N^N^C)} fragments in a dimeric complex of type [{Pt(N^N^C)}2dppm]2+. The complexes obtained were fully characterized using spectroscopic methods, and their ground-state structures and photophysical properties were studied by DFT and TD DFT methods. According to the data obtained the aromatic {benzoimidazo[1,2-a]pyrazine} fragment plays a key role in the photophysics of this type of complexes and the triplet 3LC state located at the N^N^C ligand proved to be the only emissive state in all the complexes prepared. Unexpectedly variations in the nature of the ligands occupying the fourth coordination position in the square-planar structural motif, changes in the mode of the N^N^C ligand coordination and even the Pt-Pt bond formation did not result in significant variations of the emission profile. The photophysical behavior of these complexes has been analyzed using DFT calculations, which are in complete agreement with the experimental data and confirmed that the lowest relaxed triplet configuration responsible for the phosphorescence in the complexes studied is located at the N^N^C ligand.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.SDS of cas: 13991-08-7. In my other articles, you can also check out more blogs about 13991-08-7

Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Reference of 50777-76-9. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 50777-76-9, Name is 2-(Diphenylphosphino)benzaldehyde

A diphosphine ligand (1·HPF6), which is a potential precursor to a PCNHCP pincer, with a backbone containing two phenylene groups and a central bicyclic 4-aza-2-azoniabicyclo[3.2.1]oct-2-ene unit has been synthesised and coordinated to Pd(ii) and Pt(ii) to give trans-[M(kappa2-P,P?-1·H)Cl2]PF 6 where M = Pd (2) or Pt (3a). Single-crystal structure determinations of 2 and 3a show the complexes to be isostructural with the diphosphine coordinated in a trans-spanning fashion and the amidinium unit being protonated and non-coordinated. 2 and 3a react with CH3I to give the dimers trans-[Pd2(mu-1·H)2I4](PF 6)2, 6, and trans-[Pt2(mu-1·H) 2I4](PF6)2, 7, as the major products. This bridging mode of coordination of [1·H]+ is also seen in trans-[Rh2(mu-1·H)(1,5-COD)2Cl 2]PF6, 4, and [Pt2(mu-kappa2- 1·H)(dvdms)]PF6, 5. Upon treatment with KOtBu complexes 2 and 3a undergo deprotonation at the amidinium carbon to give trans-[M(kappa3-P,C,P?-1)Cl]PF6 where M = Pd (8), and Pt (9). The related trans-[Rh(kappa3-P,C,P?-1)(CO)] PF6 (10) is prepared directly from 1·HPF6 and Rh(acac)(CO)2: this and the palladium and platinum complexes 8 and 9 are isolated as isomeric mixtures as a consequence of a conformational isomerism. In situ deprotonation of 1·HPF6 followed by addition of Ag(CF3SO3) gave SAg- [Ag(kappa3-P,C,P?-1)(CF3SO3)], 11. Some preliminary studies of the reactivity of 2 and 8 in Suzuki-type reactions are reported and the Pt(0) system has been shown to be an active hydrosilylation catalyst.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Reference of 1038-95-5, An article , which mentions 1038-95-5, molecular formula is C21H21P. The compound – Tri-p-tolylphosphine played an important role in people’s production and life.

The complexes [Pd(C6H4X-2)BrL2] (L2 = trans-(PR3)2, R = Ph, X = CH=CH2 (1a), CHO (1b), C(O)Me (1c), CN (1d); R = p-To = 4-tolyl, X = CH=CH2 (1a?); L2 = bpy = 2,2?-bipyridine, X = CHO (2b), C(O)Me (2c), CN (2d); L2 = tmeda = N,N,N?,N?-tetramethylethylenediamine, X = CHO (2b?), CN (2d?)) have been prepared by oxidative addition of the corresponding bromoarene BrC6H4X-2 to “Pd(dba)2” (=[Pd2(dba)3]·dba, dba = dibenzylideneacetone) in the presence of the appropriate ligand. The compound [Pd{C6H4(CH=CH2)-2}(bpy)(PPh3)]TfO (3a; TfO = CF3SO3) has been obtained by reacting 1a with bpy in the presence of TlOTf. The cyclopalladated [Pd{kappa2-C,O-C6H4{C(O)Me}-2}(bpy)]TfO (4c) has been prepared from 2c and TlOTf. The dimeric complexes [Pd(mu-Br)(C6H4X-2)(PR3)]2 (R = Ph, X = CHO (5b), C(O)-Me (5c), CN (5d); R = o-To = 2-tolyl, X = CHO (5b?), CN (5d?)) have been synthesized by reacting complexes 1b-d with [PdCl2(NCPh)2] in a 2:1 molar ratio or C6H4Br-1-X-2 with “Pd(dba)2” and P(o-To)3 in 1:1:1 molar ratio. The latter method leads to the monomeric [Pd{kappa2-C,O-C6H 4{C(O)Me}-2})Br{P(o-To)3}] (6c?) when X = C(O)Me. The complex 2c reacts with the alkyne PhC?CPh or EtC?CEt and TlOTf to give 1-methyl-2,3-diphenyl-1H-indenol (7) or 1-methyl-2,3-diethyl-1H-indenol (8), respectively. The crystal structures of complexes 1a·2CH2Cl2, 1b·CH2Cl2, 2b,d, and 6c? have been determined by X-ray diffraction studies. An interesting supramolecular layered structure is formed through CN. . .H-Cbpy and Br. . .H-Cbpy hydrogen bonds in complex 2d.

I hope this article can help some friends in scientific research. I am very proud of our efforts over the past few months and hope to 1038-95-5, help many people in the next few years., Reference of 1038-95-5

Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Application of 4020-99-9, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 4020-99-9, C13H13OP. A document type is Article, introducing its new discovery.

The X-ray structures of (5) cis-PtBr2(P(OMe)3) 2, (6) cis-PtBr2(P(OMe)2Ph)2, (7) cis-PtBr2(P(OMe)Ph2)2, (8) cis-PtBr 2(PPh3)2, (9) cis-PtI2(P(OMe) 3)2, (10) cis-PtI2(P(OMe)2Ph) 2, (11) cis-PtI2(P(OMe)Ph2)2 and (12) cis-PtI2(PPh3)2 are reported and compared with the previously reported chloride analogues. The magnitude of the J{Pt-P} varies linearly with the Pt-P bond length (lPt-P = 2.421 -J/24255) for these 12 complexes.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Reference of 787618-22-8, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 787618-22-8, C30H43O2P. A document type is Article, introducing its new discovery.

A series of derivatives of the known thromboxane A2 prostanoid (TP) receptor antagonists, 3-(6-((4-chlorophenyl)sulfonamido)-5,6,7,8-tetrahydronaphthalen-1-yl)propanoic acid and 3-(3-(2-((4-chlorophenyl)sulfonamido)ethyl)phenyl) propanoic acid, were synthesized in which the carboxylic acid functional group was replaced with substituted cyclopentane-1,3-dione (CPD) bioisosteres. Characterization of these molecules led to the discovery of remarkably potent new analogues, some of which were considerably more active than the corresponding parent carboxylic acid compounds. Depending on the choice of the C2 substituent of the CPD unit, these new derivatives can produce either a reversible or an apparent irreversible inhibition of the human TP receptor. Given the potency and the long-lasting inhibition of TP receptor signaling, these novel antagonists may comprise promising leads for the development of antithromboxane therapies.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Related Products of 161265-03-8, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 161265-03-8, Name is (9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(diphenylphosphine), molecular formula is C39H32OP2. In a Article，once mentioned of 161265-03-8

Transition-metal-catalyzed C-alkylation of ketones and secondary alcohols, with alcohols, avoids use of organometallic or environmentally unfriendly alkylating agents by means of borrowing hydrogen (BH) or hydrogen autotransfer (HA) activation of the alcohol substrates. Water is formed as the only by-product, thus making the BH process atom-economical and environmentally benign. Diverse homogeneous and heterogeneous transition-metal catalysts, ketones, and alcohols can be used for this transformation, thus rendering the BH process promising for replacing those procedures that use traditional alkylating agents. This Minireview summarizes the advances during the last five years in transition-metal-catalyzed BH alpha-alkylation of ketones, and beta-alkylation of secondary alcohols with alcohols. A discussion on the application of the BH strategy for C-C bond formation is included. Something borrowed: The major advances during the past five years in transition-metal-catalyzed borrowing-hydrogen (BH) alkylation of ketones, secondary alcohols, and related compounds with alcohols are summarized. Water is formed as the only by-product, thus making the BH process atom-economical and environmentally benign.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 161265-03-8 is helpful to your research., Related Products of 161265-03-8

Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

1038-95-5, Name is Tri-p-tolylphosphine, molecular formula is C21H21P, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 1038-95-5, Computed Properties of C21H21P

The reaction between PPN[AuCl4] and [Hg(mes)2] gives the anionic complex cis-PPN[Au(mes)2Cl2] (1) and [Hg(mes)Cl] as side-product. Complex 1 is a precursor to other compounds both neutral and cationic. Removal of one chloride ligand affords the mononuclear neutral complexes cis-[Au(mes)2ClL] (L = PPh3 (2), P{p-tol}3 (3), AsPh3 (4), SPPh3 (5)) by addition of a neutral ligand or, alternatively if no ligand is added, dimeric cis-[Au(mes)2Cl]2 (6). If both chloride groups in 1 are removed, cationic compounds can be obtained by addition of a potentially bidentate ligand affording cis-[Au(mes)2(L-L)]X complexes (X = ClO4, L-L = bipy (7), L-L = phen (8), L-L = dppe (9) X = SO3CF3, L-L = dppm (10)). Dithiocarbamate- or acetate salts can be added to solutions of ‘Au(mes)2X’ (obtained by removal of two chloride anions in 1) leading to the neutral compounds cis-[Au(mes)2(L-L)] (L-L = S2CNR2 (R = Me (11), Et (12), Bz (13)), O2CCF3 (14)). The structures of cis-[Au(mes)2Cl(PPh3)] (2) and cis-[Au(mes)2Cl]2 (6) have been established by an X-ray diffraction study.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Quality Control of: Tri-p-tolylphosphine. In my other articles, you can also check out more blogs about 1038-95-5

Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Synthetic Route of 131211-27-3, Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn’t involve a screen. 131211-27-3, C20H31P. A document type is Article, introducing its new discovery.

We have prepared a series of new rhenium complexes containing chiral ferrocenyldiphosphane ligands of the Josiphos family, starting from commercially available rhenium sources. These new ReV oxido and nitrido complexes, several of which have been characterized by X-ray crystallography, are air- and moisture-stable and are active catalysts in the asymmetric transfer hydrogenation of ketones using 2-propanol as the hydrogen source in the presence of substoichiometric amounts of triethylamine (TEA). The reaction proceeds cleanly with good to excellent yields (50-99 %) but with moderate enantioselectivity (up to 58 % ee). A mechanism not involving hydridic species is proposed.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Reference of 12150-46-8. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene

The syntheses and characterization of series of new metallocene-bridged diphosphines and the structures of complexes of some of them with Pd(II) are reported. These complexes were examined as the catalysts in amination reactions of halogenoarenes and in the Suzuki reaction. The complexes based on ruthenocene (2) and osmocene (3) showed lower activities then the palladium complex with dppf in amination reactions and the same activities in the Suzuki reaction. New palladium complexes with the bidentate bulky and electron-rich ligands Fe(eta5-C5H4P(o-PriC 6H4)2)2 (6) and Feeta5- C5H4P(o-MeOC6H4)2) 2 (5) showed a very high catalytic activity in amination and Suzuki coupling of aryl bromides. A complex with ligand 6 was used in the amination of 4-bromotoluene by primary and secondary amines and showed excellent activity.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Electric Literature of 50777-76-9. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 50777-76-9, Name is 2-(Diphenylphosphino)benzaldehyde. In a document type is Article, introducing its new discovery.

Octahedral and square-planar isothiocyanato complexes of Ni(II) with the condensation derivative of 2-(diphenylphosphino)benzaldehyde and Girard’s T reagent were synthesized and characterized by elemental analysis, IR spectroscopy and X-ray crystallography. Results of magnetic measurements for octahedral Ni(II) complex were also reported. In all the complexes the ligand is coordinated as tridentate via the phosphorus, the imine nitrogen and the carbonyl oxygen atoms while the remaining coordination positions are occupied with thiocyanato anions. Coordination of deprotonated phosphine ligand results in formation of square-planar complexes, while the octahedral complex was formed with protonated ligand. Reaction energetics with both forms of ligand were studied by the means of DFT and results were in complete agreement with experimental observations. Furthermore, ligand field splitting analysis gave the deeper insight in the relationship of the isolated complex coordination environment and protonation of the ligand.

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Reference：
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate