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• 22031-12-5 [2-((diphenylphospino)methyl)-2-methyl-1,3-propanediyl]bis[diphenylphosphine] 

Relevant academic research and scientific papers

Multifunctional phosphine stabilized gold nanoparticles: An active catalytic system for three-component coupling reaction

Multifunctional phosphine based ligands, 1,1,1- tris(diphenylphosphinomethyl)ethane [CH3C(CH2 PPh 2)3][P3] and 1,1,1- tris(diphenylphosphinomethyl)ethane trisulphide [CH3C(CH 2P(S)Ph2)3][P3S3] have been introduced to stabilize Au°-nanoparticles having small core diameter and narrow size distribution. The Au°-nanoparticles were synthesized by the reduction of HAuCl4 precursor with NaBH4 in the presence of ligand P3 or P3S3 using two phases, one pot reaction at room temperature. The Au°-nanoparticles exhibit face centered cubic (fcc) lattice having different crystalline shape i.e., single crystallite stabilized by P3 while P3S3 forms decahedral shapes. Surface plasmon bands at ~520 nm and TEM study indicate particle size below 2 and 4 nm for Au°-nanoparticles stabilized by P3 and P3S3 respectively, which are attributable to the stronger interaction of Au° (Soft) with P (Soft) than Au° (Soft) with S (less Softer than P). Au°-nanoparticles stabilized by P3S3 shows higher thermal stability than that of P3. The synthesized Au°-nanoparticles serve as an efficient catalyst for one-pot, three-component (A3) coupling of an aldehyde, an amine and an alkyne via C H alkyne-activation to synthesize propargylamines (85-96%) without any additives and precaution to exclude air. Copyright

Pdo-nanoparticles stabilized by tripodal phosphine based ligands and their catalytic activities on carboncarbon bond formation reactions

Tripodal ligands, 1,1,1-tris(diphenylphosphinomethyl)ethane [CH 3C(CH2PPh2)3] [P3] and 1,1,1-tris(diphenylphosphinomethyl)ethane trisulphide [CH3C(CH 2P(S)Ph2)3] [P3S3] have been introduced to stabilize Pdo-nanoparticles having small core diameter and narrow size distribution. The Pdo-nanoparticles were synthesized by the reduction of K2PdCl4 precursor with NaBH4 in the presence of ligand P3 or P3S 3 using two phases, one pot reaction at room temperature. TEM and XRD studies indicate that P3 stabilizes smaller sized Pd o-nanoparticles (3S3 (o (Soft) with P (Soft) than Pdo (Soft) with S (less Softer than P). The Pdo-nanoparticles exhibit face centered cubic (fcc) lattice geometry and high thermal stability (～150 °C). The synthesized Pdo-nanoparticles serve as an efficient catalyst for the carboncarbon bond formation reactions, e.g. in Suzuki coupling reaction, aryl halides and arylboronic acids result cross-coupling products with about 94% isolated yield and 100% selectivity; in Heck coupling reaction, the vinylation of aryl halides with olefins result coupling products with 97% yield and >99% trans selectivity while in the alkynylation of aryl halides with terminal alkynes, i.e. Sonogashira coupling reaction, the cross-coupling products of about 94% isolated yield with 100% selectivity were observed. The synthesized nanocatalysts could be reused without significant loss of their catalytic activity.

Preparation and properties of sandwiched trinuclear palladium(II) complexes with tridentate phosphine and phosphine sulfide ligands

The central phosphino group of tripodal tetradentate tris[2- (diphenylphosphino)ethyl]phosphine (pp3) was selectively oxidized by the reaction with diethyl disulfide to give tridentate phosphine ligand pOp 3. The terminal phosphino g

Synthesis, characterisation and thermal studies of ruthenium(II) carbonyl complexes of functionalised tripodal phosphine chalcogen donor ligands, [CH3C(CH2P(X)Ph2)3], where X = Se, S, O

The polymeric ruthenium(II) carbonyl complex, [Ru(CO)2Cl2]n reacts with 1,1,1-tris-(diphenylphosphinomethyl)ethane trichalcogenide ligands, [CH3C(CH2P(X)Ph2)3], where X = Se(a),

Cobalt-catalyzed selective oxidation of the tritertiary phosphane triphos with molecular oxygen

The reactivity of complexes of triphos [CH3C(CH2PPh2)3] and CoCl2 towards dioxygen has been investigated. Reaction of the pseudo-tetrahedral complex (η2-triphos)CoCl2 (1) with dioxygen yields after work-up the mixed phosphane/phosphane oxide ligands triphosO and triphosO2. The novel ligand triphosO2 can be obtained in quantitative yield using catalytic amounts of 1. In order to gain some insight into the catalytic dioxygen activation reaction, experiments with va-nous triphos/Co/Cl species, in different solvents and at several concentrations have been carried out. A mechanism involving two separate reaction pathways is proposed. Complexes of triphosO and triphosO2 with CoCl2, [η2-(P,P)-in-phosO]CoCl2 (4), and [η2-(P,O)-triphosO2]CoCl2 (5), which are present as intermediates in the oxygenation reaction, have been isolated and fully characterized including X-ray structural analyses. WILEY-VCH Verlag GmbH,.