Tag: M.W:300-400

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Journal of Molecular Structure called Novel Hg(II) and Pd(II) benzotriazole (Hbta) complexes: Synthesis, characterization, X-ray crystal structure of [Pd(PPh3)(μ-bta)Cl]2. DMSO and thermodynamic study of their H2 storage, Author is Al-Jibori, Subhi A.; Al-Doori, Luma A.; Al-Janabi, Ahmed S. M.; Alheety, Mustafa A.; Akbas, Huseyin; Karadag, Ahmet, which mentions a compound: 1663-45-2, SMILESS is P(CCP(C1=CC=CC=C1)C2=CC=CC=C2)(C3=CC=CC=C3)C4=CC=CC=C4, Molecular C26H24P2, Reference of 1,2-Bis(diphenylphosphino)ethane.

Benzotriazole (Hbta) complexes with Hg(II) and Pd(II) of the types: [Hg(bta)2] (1), [Hg(bta)2(diphos)]; diphos = dppe (2), dppp (3) or dppb (4), [Hg(bta)2(PPh3)2] (5), [Pd(Hbta)2Cl2] (6), [Pd(bta)Cl]2(7) and [PdCl(bta)(PPh3)]2. DMSO (8) were prepared and characterized by elemental analyses, conductivity measurements, IR, 1H- and 31P-{1H} NMR spectra.[Pd(PPh3)(μ-bta)Cl]2. DMSO (8) was structurally characterized by single-crystal x-ray diffraction. Structural information exposed that benzotriazole acts as a bidentate bridging ligand bonded through the deprotonated nitrogen and the neutral nitrogen atoms. The hydrogen storage ability of complexes (1-4) was studied after detecting their BET surface area. 1 Is able to store 3.35% phys. at 77 K under 120 bar.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1,2-Bis(diphenylphosphino)ethane, is researched, Molecular C26H24P2, CAS is 1663-45-2, about Synthesis and characterisation of a range of Fe, Co, Ru and Rh triphos complexes and investigations into the catalytic hydrogenation of levulinic acid, the main research direction is hydrogenation catalyst ruthenium rhodium triphos complex; crystal structure iron cobalt ruthenium rhodium triphos complex; mol structure iron cobalt ruthenium rhodium triphos complex; triphos ligand preparation reaction iron cobalt ruthenium rhodium halide.Product Details of 1663-45-2.

The coordination chem. of the N-triphos ligand (NPPh3, 1b) was studied with a range of Fe, Co and Rh precursors and found to form either tridentate or bidentate complexes. Reaction of NPPh3 with [Rh(COD)(MeCN)2]BF4 gave the tridentate complex [Rh(COD)(κ3-NPPh3)]BF4 (3) in the solid state, however, in solution a bidentate complex predominates in more polar solvents. Reaction of NPPh3 with Fe carbonyl precursors revealed the formation of the bidentate complexes [Fe(CO)3(κ1,κ2-NPPh3)Fe(CO)4] (4) and [Fe(CO)3(κ2-NPPh3)] (5), while reaction with FeBr2 resulted in the paramagnetic bidentate complex [Fe(Br)2(κ2-NPPh3)] (6). Reaction of NPPh3 with CoCl2 gave a dimeric Co species [(κ2-NPPh3)CoCl(κ1,κ2-NPPh3)CoCl3] (7), while Zn powder reduction of NPPh3 Co halides gave the tridentate complexes of the type: [Co(X)(κ3-NPPh3)]. The related triphos Ru complex, [Ru(CO3)(CO)(κ3-CPPh3)] (2), also was isolated and characterized. Preliminary catalytic hydrogenation of levulinic acid (LA) was conducted with 2 and 3. The Ru complex is catalytically active, giving high conversions of LA to form gamma-valerolactone (GVL) and 1,4-pentanediol (1,4-PDO), while 3 is catalytically inactive. In situ catalytic testing with 1b and Fe(BF4)2.6H2O resulted in low conversions of LA while a combination of 1b and Co(BF4)2.6H2O gave high conversions to GVL.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Al-Jibori, Subhi A.; Al-Doori, Luma A.; Al-Janabi, Ahmed S. M.; Alheety, Mustafa A.; Wagner, Christoph; Karadag, Ahmet published the article 《Mercury(II) mixed ligand complexes of phosphines or amines with 2-cyanoamino thiophenolate ligands formed via monodeprotonation and carbon-sulfur bond cleavage of 2-aminobenzothiazole. X-ray crystal structures of [Hg(SC6H4NCN)(PPh3)]2 and [Hg(SC6H4NCN)(Ph2PCH2PPh2)]2》. Keywords: mercury phosphine amine cyanoaminothiophenolate complex preparation crystal structure.They researched the compound: 1,2-Bis(diphenylphosphino)ethane( cas:1663-45-2 ).Formula: C26H24P2. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1663-45-2) here.

The addition of sodium hydroxide to a mixture of Ph mercury acetate and 2-aminobenzothiazole in warm ethanol led to the high yield (84%) formation of [Ph-Hg(LH)]n (1), LH = the 2-cyanoaminothiaphenolate anion (SC6H4NHC[n.58118]N)-, resulting from monodeprotonation of 2-aminobenzothiazole and facile carbon-sulfur bond breakage. Reaction of 1 with Ph3P or Ph3PS afforded [Hg(LH)2(Ph3P)2] (2) or [PhHg(μ-LH)(Ph3PS)]2 (3), resp. Recrystallization of 2 from warm DMSO afforded [Hg(μ-L)(PPh3)]2 (4), L = the 2-cyanoaminothiophenolate di-anion (SC6H4NC[n.58118]N)2-, which was characterized by an x-ray diffraction study. Treatment of 1 with the diphosphines Ph2P(CH2)nPPh2, 2,6-diaminopyridine (dapy), ethylenediamine (en) or 1,10-phenanthroline (phen) afforded [PhHg(LH){ Ph2P(CH2)nPPh2}], {n = 1 dppm (5), n = 2 dppe (6), n = 3 dppp (7), n = 4 dppb (8), (CH2)n = (Cp)2Fe dppf (9)}, [PhHg(LH)(dapy)2] (11), [PhHg(LH)(en)] (12) or [PhHg(LH)(phen)] (13). Recrystallization of 5 from CH2Cl2 afforded binuclear [Hg(μ-L)(η1-dppm)]2.CH2Cl2 (10), which was characterized by an x-ray diffraction study.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Chemical Communications (Cambridge, United Kingdom) called An arene-stabilized η5-pentamethylcyclopentadienyl antimony dication acts as a source of Sb+ or Sb3+ cations, Author is Zhou, Jiliang; Kim, Hyehwang; Liu, Liu Leo; Cao, Levy L.; Stephan, Douglas W., which mentions a compound: 1663-45-2, SMILESS is P(CCP(C1=CC=CC=C1)C2=CC=CC=C2)(C3=CC=CC=C3)C4=CC=CC=C4, Molecular C26H24P2, Reference of 1,2-Bis(diphenylphosphino)ethane.

Double chloride abstraction from Cp*SbCl2 (Cp* = pentamethylcyclopentadienyl) affords an arene-stabilized η5-Cp*-bound antimony dicationic compound [(η5-Cp*)Sb(tol)][B(C6F5)4]2 (1) (tol = toluene), which exhibits strong Lewis acidity, abstracting chloride from Ph3CCl. 1 Reacts with different Lewis bases via divergent pathways, giving rise to release of either Sb+ or Sb3+ cations.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Formula: C26H24P2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 1,2-Bis(diphenylphosphino)ethane, is researched, Molecular C26H24P2, CAS is 1663-45-2, about Synthesis of ruthenium-dithiocarbamate chelates bearing diphosphine ligands and their use as latent initiators for atom transfer radical additions. Author is Aldin, Mohammed Zain; Zaragoza, Guillermo; Delaude, Lionel.

Nine representative [Ru(S2CNEt2)2(diphos)] complexes were prepared in almost quant. yields (91-97%) from [RuCl2(p-cymene)]2, Na diethyldithiocarbamate trihydrate, and a diphosphine (dppm, dppe, dppp, dppb, dpppe, dppen, dppbz, dppf, or DPEphos), using a novel, straightforward, 1-pot procedure. The recourse to a monomodal microwave reactor was instrumental in reaching the thermodn. equilibrium favoring the targeted monometallic trichelates. All the products were fully characterized by using various anal. techniques and the mol. structures of seven of them were determined by x-ray crystallog. NMR, XRD, and IR spectroscopies evidenced a significant contribution of the thioureide resonance form Et2N+:CS2-2 to the electronic structure of the 1,1-dithiolate ligand. MS/MS spectrometry showed the formation of phosphine-free [Ru(S2CNEt2)2]+ cations in the gas phase, except when starting from [Ru(S2CNEt2)2(dppbz)]. The activity of the nine complexes was probed in three different catalytic processes, viz., the cyclopropanation of styrene with Et diazoacetate, the synthesis of vinyl esters from HOBz and 1-hexyne, and the atom transfer radical addition (ATRA) of CCl4 and Me methacrylate. In the 1st two reactions, the saturated trichelates were poorly efficient. This was most likely due to their high stability, which prevented the formation of coordinatively unsaturated species. Contrastingly, with a turnover number of 2000 and an initial turnover frequency of 2080 h-1 for a 0.05 mol% catalyst loading, the [Ru(S2CNEt2)2(dppm)] complex emerged as a very robust, latent ATRA initiator, whose activity matched or outperformed those displayed by the most efficient Ru catalysts described so far.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called A Mild One-Pot Reduction of Phosphine(V) Oxides Affording Phosphine(III) and Their Metal Catalysts, published in 2021-03-22, which mentions a compound: 1663-45-2, mainly applied to one pot reduction phosphine oxide chlorodisilane reducing reagent oxalylchloride; phosphine derivative transition metal complex preparation; crystal structure chlorophosphonium azolium salt; mol structure chlorophosphonium azolium salt, Recommanded Product: 1,2-Bis(diphenylphosphino)ethane.

The metal-free reduction of a range of phosphine(V) oxides employing oxalyl chloride as an activating agent and hexachlorodisilane as reducing reagent was achieved under mild reaction conditions. The method was successfully applied to the reduction of industrial waste byproduct PPh3(V) oxide, closing the P cycle to cleanly regenerate PPh3(III). Mechanistic studies and quantum chem. calculations support the attack of the dissociated chloride anion of intermediated phosphonium salt at the Si of the disilane as the rate-limiting step for deprotection. The exquisite purity of the resultant phosphine(III) ligands after the simple removal of volatiles under reduced pressure circumvents laborious purification prior to metalation and has permitted the facile formation of important transition metal catalysts.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Bootharaju, Megalamane S.; Lee, Sanghwa; Deng, Guocheng; Chang, Hogeun; Baek, Woonhyuk; Hyeon, Taeghwan published an article about the compound: 1,2-Bis(diphenylphosphino)ethane( cas:1663-45-2,SMILESS:P(CCP(C1=CC=CC=C1)C2=CC=CC=C2)(C3=CC=CC=C3)C4=CC=CC=C4 ).Synthetic Route of C26H24P2. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:1663-45-2) through the article.

Ligand protected metal nanoclusters (NCs) are an emerging class of functional materials with intriguing photophys. and chem. properties. The size and mol. structure play an important role in endowing NCs with characteristic optical and electronic properties. Modulation of these properties through the chem. reactivity of NCs is largely unexplored. Here, we report on the synthesis of self-assembled Ag2Cl2(dppe)2 clusters through the ligand-exchange-induced transformation of [Pt2Ag23Cl7(PPh3)10] NCs [(dppe): 1,2-bis(diphenylphosphino)ethane; (PPh3): triphenylphosphine]. The single crystal x-ray structure reveals that two Ag atoms are bridged by one dppe and two Cl ligands, forming a Ag2Cl2(dppe) cluster, which is subsequently self-assembled through dppe ligands to form [Ag2Cl2(dppe)2]n. Importantly, the Ag2Cl2(dppe)2 cluster assembly exhibits high photoluminescence quantum yield: ≈18%, which is attributed to the metallophilic interactions and rigidification of the ligand shell. We hope that this work will motivate the exploitation of the chem. reactivity of NCs as a new path to attain cluster assemblies endowed with enhanced photophys. properties.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1,2-Bis(diphenylphosphino)ethane( cas:1663-45-2 ) is researched.Application of 1663-45-2.Faujdar, Hemlata; Spannenberg, Anke; Kaur-Ghumaan, Sandeep published the article 《Structural and HER studies of diphosphine-monothiolate complexes [Fe2(CO)4(μ-naphthalene-2-thiolate)2(μ-dppe)] and [Fe2(CO)4(μ-naphthalene-2-thiolate)2(μ-DPEPhos)]》 about this compound( cas:1663-45-2 ) in Inorganica Chimica Acta. Keywords: iron diphosphine thiolate complex preparation crystal structure cyclic voltammetry; hydrogen evolution reaction catalyst iron diphosphine thiolate complex. Let’s learn more about this compound (cas:1663-45-2).

Two new compounds [Fe2(CO)4(μ-naphthalene-2-thiolate)2(μ-dppe)] 1 and [Fe2(CO)4(μ-naphthalene-2-thiolate)2(μ-DPEPhos)] 2 with chelating phosphine ligands were synthesized and characterized {dppe = 1,2-Bis(diphenylphosphino)ethane and DPEPhos = (Oxydi-2, 1-phenylene)bis(diphenylphosphine)}. The bridging coordination mode of the diphosphine ligand in complex 1 was confirmed by x-ray crystallog. Complexes 1 and 2 were further evaluated as catalysts for the hydrogen evolution reaction (HER) by electrochem. studies. Complex 1 showed better stability whereas complex 2 degraded in the presence of acids.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

SDS of cas: 1663-45-2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1,2-Bis(diphenylphosphino)ethane, is researched, Molecular C26H24P2, CAS is 1663-45-2, about Carboxylation of a Palladacycle Formed via C(sp3)-H Activation: Theory-Driven Reaction Design. Author is Kanna, Wataru; Harabuchi, Yu; Takano, Hideaki; Hayashi, Hiroki; Maeda, Satoshi; Mita, Tsuyoshi.

Theory-driven organic synthesis is a powerful tool for developing new organic transformations. A palladacycle(II), generated from 8-methylquinoline via C(sp3)-H activation, is frequently featured in the scientific literature, albeit that the reactivity toward CO2, an abundant, inexpensive, and non-toxic chem., remains elusive. Authors have theor. discovered potential carboxylation pathways using the artificial force induced reaction (AFIR) method, a d.-functional-theory (DFT)-based automated reaction path search method. The thus obtained results suggest that the reduction of Pd(II) to Pd(I) is key to promote the insertion of CO2. Based on these computational findings, they employed various one-electron reductants, such as Cp*2Co, a photoredox catalyst under blue LED irradiation, and reductive electrolysis ((+)Mg/(-)Pt), which afforded the desired carboxylated products in high yields. After screening phosphine ligands under photoredox conditions, they discovered that bidentate ligands such as dppe promoted this carboxylation efficiently, which was rationally interpreted in terms of the redox potential of the Pd(II)-dppe complex as well as on the grounds of DFT calculations They are convinced that these results could serve as future guidelines for the development of Pd(II)-catalyzed C(sp3)-H carboxylation reactions with CO2.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Al-Janabi, Emaad M. A.; Hatshan, Mohammad R.; Adil, Syed Farooq; Kadhum, Wesam R.; Al-Jibori, Subhi A.; Faihan, Ahmed S.; Al-Janabi, Ahmed S. researched the compound: 1,2-Bis(diphenylphosphino)ethane( cas:1663-45-2 ).Synthetic Route of C26H24P2.They published the article 《Spectroscopic, antibacterial and anti-cancer studies of new platinum(II)-diethyldithiocarbamate mixed ligand complexes with phosphine or amine ligands》 about this compound( cas:1663-45-2 ) in Journal of Molecular Structure. Keywords: platinum diethyldithiocarbamate phosphine amine complex preparation antibacterial antitumor activity. We’ll tell you more about this compound (cas:1663-45-2).

A series of new platinum(II) mixed ligand complexes of diethyldithiocarbamate (Et2DT) and phosphine or amine ligands of the type [Pt(Et2DT)2(diphosphine)] (3-6), [Pt(Et2DT)2(diamine)](7-8), [Pt(Et2DT)2(PPh3)2] (9) and [Pt(Et2DT)2(SPPh3)2](10) have been prepared in good yield and fully characterized by elemental anal., conductivity measurements and spectroscopic data (i.r., 1H, 31P-{1H} nmr). Our interest in these types of complexes are based on the fact that these complexes are known for their promising biol. activity, and could possess interesting coordination modes, which are poorly represented in the literature. Therefore, the prepared complexes were tested for their anti-bacterial against three types of pathogenic bacteria namely S. aureus, E. coli, and p. aeruginosa. In addition, four of the prepared complexes were screened for their anti-cancer activity against lung cancer cell lines, and that the [Pt(Et2DT)2(bipy)] was significantly more potent with IC50 value is 1.0 ± 0.2μM, but the [Pt(Et2DT)2(dppf)] was practically inactive in the selected dose range with IC50 value is 32.0 ± 3.0μM.

As far as I know, this compound(1663-45-2)Synthetic Route of C26H24P2 can be applied in many ways, which is helpful for the development of experiments. Therefore many people are doing relevant researches.

Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis