Category: 13991-08-7

Application of 13991-08-7. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene. In a document type is Article, introducing its new discovery.

The intermediacy of a reduced nickel-iron hydride in hydrogen evolution catalyzed by Ni-Fe complexes was verified experimentally and computationally. In addition to catalyzing hydrogen evolution, the highly basic and bulky (dppv)Ni(mu-pdt)Fe(CO)(dppv) ([1]0 dppv = cis-C2H2(PPh2)2) and its hydride derivatives have yielded to detailed characterization in terms of spectroscopy, bonding, and reactivity. The protonation of [1]0 initially produces unsym-[H1]+, which converts by a first-order pathway to sym-[H1]+. These species have C1 (unsym) and Cs (sym) symmetries, respectively, depending on the stereochemistry of the octahedral Fe site. Both experimental and computational studies show that [H1]+ protonates at sulfur. The S = 1/2 hydride [H1]0 was generated by reduction of [H1]+ with Cp?2Co. Density functional theory (DFT) calculations indicate that [H1]0 is best described as a Ni(I)-Fe(II) derivative with significant spin density on Ni and some delocalization on S and Fe. EPR spectroscopy reveals both kinetic and thermodynamic isomers of [H1]0. Whereas [H1]+ does not evolve H2 upon protonation, treatment of [H1]0 with acids gives H2. The redox state of the “remote” metal (Ni) modulates the hydridic character of the Fe(II)-H center. As supported by DFT calculations, H2 evolution proceeds either directly from [H1]0 and external acid or from protonation of the Fe-H bond in [H1]0 to give a labile dihydrogen complex. Stoichiometric tests indicate that protonation-induced hydrogen evolution from [H1]0 initially produces [1]+, which is reduced by [H1]0. Our results reconcile the required reductive activation of a metal hydride and the resistance of metal hydrides toward reduction. This dichotomy is resolved by reduction of the remote (non-hydride) metal of the bimetallic unit.

If you are interested in 13991-08-7, you can contact me at any time and look forward to more communication.Application of 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

Synthetic Route of 13991-08-7, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene, molecular formula is C30H24P2. In a patent, introducing its new discovery.

A slective one-step method is reported for the synthesis of Fe(CO)3(P-P) derivatives (P-P = chelating tertiary diphosphine), starting from FeCl2, diphosphine and manganese, in tetrahydrofuran, under a CO atmosphere, at room temperature.The use of manganese metal as reducing agent is essential for the selectivity of the process.In the absence of the reducing agent, complexes of the type Fe(CO)2(P-P)Cl2 have been obtained.All these iron compounds have been characterized by IR and 31P NMR spectroscopy.

If you are interested in 13991-08-7, you can contact me at any time and look forward to more communication.Synthetic Route of 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

Application of 13991-08-7, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene, molecular formula is C30H24P2. In a patent, introducing its new discovery.

The selective incorporation of gem-difluoroalkyl groups into biologically active molecules has long been used as an efficient strategy for drug design and discovery. However, the catalytic C(sp3)-CF2 bond-forming cross-coupling reaction for selective incorporation of difluoromethylene group into diverse alkyl chains, especially more sterically demanding secondary and tertiary functionalized alkanes, still remains as a major challenge. Herein, we describe a cobalt-catalyzed difluoroalkylation of tertiary aryl ketones for facile synthesis of quaternary alkyl difluorides, which exhibited high efficiency, broad scope and mild conditions. The synthetic utility of this method is demonstrated by late-stage difluoroalkylation of donepezil, a well-known acetylcholinesterase inhibitor used to treat the Alzheimer?s disease. Preliminary mechanistic investigations indicate that a difluoroalkyl radical is involved in a Co(I)/Co(III) catalytic cycle. This cobalt-catalyzed fluoroalkylation thus offers insights into an efficient way for the synthesis of fluoroalkylated bioactive molecules for drug discovery.

If you are interested in 13991-08-7, you can contact me at any time and look forward to more communication.Application of 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

Application of 13991-08-7, 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. 13991-08-7, C30H24P2. A document type is Article, introducing its new discovery.

The Au…Au distance in the title compound, [Au2Cl2-(C30H24P2)], is 2.996 (1) A, typical of an Au…Au interaction. The two P – Au – Cl arms ‘cross’ at the Au centers, with a Cl – Au…Au-Cl torsion angle of -63.92 (7). Only a small deviation from linearity is observed in the coordination around the Au atoms. Related phosphine-gold(I) chloride structures with intra- and intermolecular Au…Au interactions are surveyed.

If you are hungry for even more, make sure to check my other article about 13991-08-7. Application of 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

Electric Literature of 13991-08-7, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene, molecular formula is C30H24P2. In a patent, introducing its new discovery.

A series of cationic Pt(II) complexes with chelating bis-carbene and P,P- or P,S-ligands, viz. [(C^C)Pt(X^Y)][BF4]2 (2a?e), where C^C = methylenebis(3-methyl-1H-imidazol-1-yl-2-ylidene, and X^Y = Ph2PCH2CH2PPh2 (dppe) (a), Ph2P(CH2)3PPh2 (dppp) (b), 1,2-(Ph2P)2C6H4 (dppbz) (c), [Fe(eta5-C5H4PPh2)2] (dppf) (d), and Ph2PCH2CH2SPh (e), were synthesized and structurally characterized by NMR and MS spectroscopy and by single-crystal X-ray diffraction analysis. Furthermore, photophysical measurements showed that these compounds were non-emissive at room temperature. However, when cooled to 77 K, compounds 2a, 2b and 2c showed weak luminescence in the near UV region with emission maxima in the 380?395 nm range.

If you are interested in 13991-08-7, you can contact me at any time and look forward to more communication.Electric Literature of 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

Related Products of 13991-08-7, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene, molecular formula is C30H24P2. In a patent, introducing its new discovery.

The photo-induced reaction between the complexes (1), eta5-C5H5V(CO)4 (2), eta5-C5H5Mn(CO)3 (3) or eta5-C5H5Mo(CO)3CH3 (4) and the ligands o-C6H4EPh2(E’Ph2) (E = E’ = P: a; E = P, E’ = As: b; E = E’ = As: c; E = P, E’ = Sb: d; E = P, E’ = Bi: e; E = As, E’ = Sb: f) and cis-Ph2PCH=CHPPh2 (g), L, yields – depending on the steric requirement of L – the compounds L ( = cis-V(CO)4(-), cis-CpV(CO)2, CpMn(CO), CpMo(CO)CH3; L = a, b, c, g), L ( = V(CO)5(-), L = d; = CpV(CO)3, L = d, e; = CpMn(CO)2, L = e) or mixtures of L and L (< M>, = V(CO)4,5, L = e, f; , = CpV(CO)2,3, L = f).In the mono-substituted species L coordination (as indicated by the 51V NMR spectra) occurs through EPh2 and E’Ph2, which is explained by a reaction path via a lable chelate 5-ring structure.Shielding of the 51V nucleus decreases in the order g > SbPh2 > PPh2 > AsPh2 > BiPh2 (derivatives of 1) and g > SbPh2 > PPh2 > BiPh2 > AsPh2 (derivatives of 2), and is smaller in the rigid chelates incorporating the o-phenylene ligands than in the more flexible structures of phospha- and arsabutane complexes.This fact is discussed in terms of hindered ?-overlap due to distortion of the EVE angle, which also results in an increase of CO valence force constants in rigid chelates. 31P coordination shifts increase according to dppe < a < g and arphos < b (dppe = Ph2P(CH2)2PPh2, arphos = Ph2As(CH2)2PPh2). 31P NMR spectra of the molybdenum complexes suggest that the basic geometry for 4a and 4b likely is tetragonal pyramidal, while the preferred structure for 4g appears to be the trigonal bipyramid with the ligand in equatorial positions.The crystal and molecular structure of 1a is reported.The complex crystallizes in the space group C2/c (a = 2196.0, b = 1080.1, c = 2022.7 pm, beta = 124.6 deg).The most striking result is the small PVP angle of 80.8 (0.2) deg.Optimized methods for the synthesis of the ligands a-f are described; the ligands are characterized by their mass spectra. - Keywords: Carbonylphosphinevanadium, Vanadium-NMR; Phosphorus-NMR If you are interested in 13991-08-7, you can contact me at any time and look forward to more communication.Related Products of 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

Related Products of 13991-08-7, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene, molecular formula is C30H24P2. In a patent, introducing its new discovery.

We demonstrate highly efficient organic ultraviolet photodetectors using 4,4?,4??-tris[3-methyl-pheny(phenyl)amino]triphenylamine (m-MTDATA) and two excellent phosphorescent Cu(I) complexes, [Cu(DPEphos)(DPPz)]BF4 (CuDD) (DPEphos = Bis[2-(diphenylphosphino) phenyl]ether, DPPz = dipyrido(3,2-a:2?,3?-c) phenazine) and [Cu(DPEbenz)(DPPz)]BF4 (CuBD) (DPEbenz = 1,2-bis(diphenylphosphino) benzene) to act as the electron donors and acceptors, respectively. The optimized photodetector based on CuDD delivers a photocurrent of 588 muA/cm2 at -12 V, corresponding to a response of 560 mA/W under an illumination of 365 nm UV light irradiation with an intensity of 1.05 mW/cm 2 and a detectivity of 2.82 × 1011 cm Hz 1/2/W. The high response is attributed to the larger band offset at m-MTDATA/CuDD heterojunction, the suppression of radiative decay of m-MTDATA and efficient electron transfer from m-MTDATA to CuDD. The working mechanism of harvesting high performance is also discussed in detail.

If you are interested in 13991-08-7, you can contact me at any time and look forward to more communication.Related Products of 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

Synthetic Route of 13991-08-7, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene, molecular formula is C30H24P2. In a Article，once mentioned of 13991-08-7

The reaction of the diphosphine ligands 1,2-bis(diphenylphosphino)benzene (dppbz) and 1,8-bis(diphenylphosphino)naphthalene (dppn) with the hydride-bridged cluster H4Ru4(CO)12 (1) has been investigated under thermal and Me3NO activation conditions. Both activation methods furnish the diphosphine-substituted clusters 1,1-H4Ru4(CO)10(P-P) (where P-P = dppbz, dppn) as the sole isolable products. The chelating coordination mode adopted by the ancillary diphosphine ligands has been confirmed by NMR spectroscopies and X-ray crystallography. The stability of the new clusters 1,1-H4Ru4(CO)10(dppbz) and 1,1-H4Ru4(CO)10(dppn) has been examined, and both clusters have been found to be stable at elevated temperatures in toluene and extended near-UV photolysis.

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 13991-08-7 is helpful to your research., Synthetic Route of 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

Synthetic Route of 13991-08-7. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene

Cyclic voltammograms of gold complexes of bis(diphenylphosphines) were recorded using a gold working electrode.The E1/2 values vs. a saturated calomel electrode (s.c.e.) (and the peak-to-peak separations) for the PF6 salts of the following complexes were obtained: bis<1,2-bis(diphenylphosphino)benzene>gold(I), 0.463(37); bis<1,2-bis(diphenylphosphino)ethene>gold(I), 0.572 V (37); bis<1,2-bis(diphenylphosphino)ethane>gold(I), 0.458(30); bis<1,3-bis(diphenylphosphino)propane>gold(I), 0.752 V (35 mV).The first couple is electrochemically reversible and the last three show quasi-reversibility for the two-electron redox process to form the corresponding gold(III) complex.Spectroelectrochemistry of bis<1,2-bis(diphenylphosphino)benzene>gold(I) revealed only two u.v.-absorbing species in solution and the limiting spectra are those of the tetrahedral gold(I) complex and the square-planar gold(III) complex.A facile pseudo-rotation between the two geomerties is proposed.Cyclic voltammetry of the chloride or bromide salt of bis<1,2-bis(diphenylphosphino)benzene>gold(I) demonstrated that halide ion adds to the gold(III) complex but dissociates from it upon reduction back to the starting gold(I) complex.Based on electrochemical behaviour, the order of increasing lability of the gold(III) complexes is as listed above.

If you are hungry for even more, make sure to check my other article about 13991-08-7. Synthetic Route of 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

Synthetic Route of 13991-08-7, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.13991-08-7, Name is 1,2-Bis(diphenylphosphino)benzene, molecular formula is C30H24P2. In a patent, introducing its new discovery.

The one-pot synthesis of a broad variety of dihydrofuroquinolines, dihydrothienoquinolines, and dihydrobenzoquinolines is reported. The combination of the Rh(I)-catalyzed hydroarylation of vinylpyridines with the Pd(0)/Pd(II)-catalyzed direct C-H arylation in a Multicomponent-Multicatalyst Reaction (MC)2R could be used to develop an efficient and step-economic protocol for the rapid construction of molecular complexity. A high-yielding synthesis of pi-extended heteroarenes through an efficient three-step-one-pot procedure and a highly enantioselective synthesis of 6-alkylsubstituted dihydrobenzoquinolines are shown.

If you are interested in 13991-08-7, you can contact me at any time and look forward to more communication.Synthetic Route of 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