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Showing 1 to 20 of 79 for “"Triphenylphosphine"”.
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Molecular mechanics calculations of tin-bis (triphenylphosphine oxide) complexes
The capability of molecular mechanics for modeling the wide distribution of bond angles and bond lengths characteristic of coordination complexes was investigatecl. This was the preliminary step for future modeling of solvent extraction. Several tin-phosphine oxide COrnI)le:){es were selected as …
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Influence of the reducing agent triphenylphosphine on cyclooxygenase-1 metabolism of arachidonic acid
… and readily reduced to alcohols using triphenylphosphine (TPP). The initial research objectives were to determine by GC-MS the effect of lipid hydroperoxides contained in AA preparations on COX-dependent metabolism of AA after TPP treatment and isolation of AA by TLC, and the effect of …
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Synthesis and characterization of triphenylphosphine oxide containing monomers and high performance polymeric materials
Novel functionalized triphenylphosphine oxide containing monomeric materials were prepared and subsequently incorporated into high performance aromatic polyimides, polyamides, copolysiloxane-poly(aryl-imide) randomly segmented copolymers, and epoxy network systems. These uniquely designed monomers …
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The effect of the reducing agent triphenylphosphine on arachidonic acid metabolism by prostaglandin H2 synthase
… for the novel products produced by reaction of triphenylphosphine with arachidonic acid prior to and during the PGHS reaction. Triphenylphosphine (TPP) is known to reduce hydro peroxides to alcohols and is used in the present study to ascertain the extent to which hydroperoxides in arachidonic …
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The effect of stannous chloride on the solvent extraction of tetrachloroplatinate(II) ion by triphenylphosphine
… of Kâ‚‚PtClâ‚„ in HCl into CH2Cl2 using triphenylphosphine (PPh₃) has been studied in detail. It has been found that SnClâ‚‚ dramatically increases the rate and efficiency of extraction. Our studies show that the percentage Pt extraction depends upon the time allowed for extraction, the …
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The Molecular and Electronic Structure of Some Transition-Metal Complexes: I. Hexakis(urea)metal(iii) Halides. Ii. Metal(i) Halide - Triphenylphosphine Complexes
Made available in DSpace on 2014-12-10T23:01:30Z (GMT). No. of bitstreams: 1 7317178.pdf: 3367817 bytes, checksum: 911200b33692d05b2402019c3eb7aba1 (MD5) Previous issue date: 1972
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Organometallic imido, sulfido and oxo complexes of osmium(VI)
… (OSO$\sb2$CF$\sb3$), was deprotonated with triphenylphosphine, pyridine or water forming $(\eta\sp5$-C$\sb5$H$\sb5$)Os(N=CH$\sb2$)(CH$\sb2$SiMe$\sb3)\sb 2.$ This compound can be reprotonated with strong acids. The reaction of (($\eta\sp5$-C$\sb5$H$\sb5$)Os(N)(CH$\sb2$SiMe$\sb3)\sb2$) …
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Studies of oxime complexes
… ligand. The interaction of Cu(mnr)2. 2py with triphenylphosphine gave several products including a phenoxazinone and a novel phenoxazinone phosphorus ylid whose structure was elucidated by X-ray crystallography. The complex Cu(6-Memnr)2. 2py behaved similarly towards triphenylphosphine. The …
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Synthesis, characterization, and reactivity studies of iridium complexes bearing the ligand diphenylphosphidoboratabenzene
… and Me₃SnBr with DPB as a ligand in place of triphenylphosphine. Two products from the oxidative addition of p-chlorobenzyl bromide have been isolated and structurally characterized.
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The synthesis, characterization and decomposition studies of novel palladacycloalkanes and their precursors
… 1,5-cyclooctadiene (COD), 2,2'bipyridine (bipy), triphenylphosphine (PPh3), and 1,2-bis(diphenylphosphino)ethane (dppe), and their precursors were successfully carried out. The complexes were characterized by 1H, 13C and 31p NMR spectroscopy, mass spectrometry as well as elemental analysis. The …
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o-Nitrosophenol complexes and their synthetic potential
Interaction of triphenylphosphine with Ni(XqO)2 (XqOH = 2-nitrosophenol, X = 4-chloro, 4-bromo, 4-methyl and 5-methoxy) resulted in deoxygenation to give mainly bis(2-triphenylphosphiniminophenolato) nickel(ll), Similarly the interaction of triphenyl phosphine with Zn(qO)2 (qOH = 5-methoxy-2- …
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Synthesis and use of bench-stable precatalysts with heck-type activation and progress towards the continuous-flow synthesis of atorvastatin
… of a new class of air- and moisture-stable triphenylphosphine nickel(II) precatalysts, which activate through a Heck-type mechanism. The activity of these precatalysts is demonstrated with a carbonyl-ene coupling reaction.
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Synthesis, structure, and reactivity of borabenzene and boratabenzene complexes
… establish that it has the same steric bulk as triphenylphosphine. Comparative studies of its transition metal complexes show that it is considerably more electron-donating than triphenylphosphine.
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Study of 4(E)-Trans-6, 7-Epoxy-2, 2-Dimethyl-4-Decen-3-One
… by reacting 1-bromo-3,3-dimethyl-2-butanone with triphenylphosphine. Then the reactive sities will be tested using phenyllithium.
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The versatility and utilization of phosphorus based compounds in classic carbon-carbon bond forming and esterification reactions
… with the addition of a catalytic amount of triphenylphosphine that allowed for complete conversion and high isolated yields. The reactions involving aryl chlorides were considerably slower, although the addition of triphenylphosphine and heating at 70°C allowed high conversion of electron …
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The Utilization of Carbene Catalysis and Different Synthetic Strategies for Sydnone Construction
… utilization of the Vilsmeier –Haak reagent and triphenylphosphine oxide to provide fast reactions and excellent yields. Both of these catalytic methods were optimized, and broad substrate scopes were demonstrated in high yields. These findings are supported by DFT studies and the calculations of …
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Synthesis and Characterization of Mononuclear and Polynuclear Metal-Fullerene Complexes
… form arene complexes is extend to a coordinated triphenylphosphine moiety, leading to (reversible) coordination of a phenyl ring to an adjacent ruthenium center in the cluster unit.
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