Results 21 to 30 of about 19,048 (288)

Ni-catalyzed hydroarylation of alkynes with unactivated β-C(sp2)−H bonds

Nature Communications, 2022
Directed activation of C–H bonds usually occurs through 5-membered metallacycles, which poses limitations of regiochemistry. Herein, the authors use a phosphine oxide-ligated Ni−Al bimetallic catalyst to enable β-C−H bond-involved hydroarylations of ...
Shao-Long Qi, Yu-Peng Liu, Yi Li, Yu-Xin Luan, Mengchun Ye   +4 more
doaj   +1 more source

Microwave-assisted synthesis of N,N-bis(phosphinoylmethyl)amines and N,N,N-tris(phosphinoylmethyl)amines bearing different substituents on the phosphorus atoms

Beilstein Journal of Organic Chemistry, 2019
A family of N,N-bis(phosphinoylmethyl)amines bearing different substituents on the phosphorus atoms was synthesized by the microwave-assisted and catalyst-free Kabachnik–Fields reaction of (aminomethyl)phosphine oxides with paraformaldehyde and ...
Erika Bálint, Anna Tripolszky, László Hegedűs, György Keglevich   +3 more
doaj   +1 more source

Synthesis of Unsymmetrical Bis(phosphine) Oxides and Their Phosphines via Secondary Phosphine Oxide Precursors

Journal of Inorganic and Organometallic Polymers and Materials, 2019
The unsymmetrical bidentate phosphine ligands (Me)2PCH2CH2CH2P(Et)2 (14), (Me)2PCH2CH2CH2P(iPr)2 (15), (Me)2PCH2CH2CH2P(Cy)2 (16), and (Me)2PCH2CH2CH2P(Ph)2 (17) were synthesized using air–stable phosphine oxide intermediates. In the first step, sodium phosphinites formed by deprotonation of (Me)2P(O)H, (Et)2P(O)H, and (iPr)2P(O)H were alkylated by 1 ...
James R. Pedroarena, Bryan P. Nell, Lev N. Zakharov, David R. Tyler   +3 more
openaire   +3 more sources

The oxidation of phosphine [PDF]

Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, 1930
Abstract In a previous paper Hinshelwood and the author described experiments on the oxidation of phosphine at low pressures in which it was shown that there is a limiting pressure below which the rate of reaction is negligibly slow but above which the mixture explodes.
openaire   +1 more source

Rhenium(I)-Based Monocyclic and Bicyclic Phosphine Oxide-Coordinated Supramolecular Complexes. [PDF]

ACS Omega, 2016
Neutral, flexible ditopic phosphine (P–P) or phosphine oxide (OP–PO) donors, rigid anionic bis-chelating oxygen donors, and Re2(CO)10 were used to assemble ten phosphine oxide (PO)-donor-based neutral monocyclic M2LL′-, bicyclic M4L2L″-, and bicyclic ...
Shankar B, Arumugam R, Elumalai P, Sathiyendiran M.   +3 more
europepmc   +3 more sources

Evaluation of headspace Solid Phase Micro-extraction method for analysis of phosphine residues in wheat

, 2010
This new method utilizes headspace-solid-phase micro extraction (HS-SPME) for pre-concentration of PH3. Phosphine was determined with gas chromatography/pulsed flame photometric detector (PFPD).
Padovan, B., Ren, Y.L., Ren, Y. L.
core   +1 more source

Two tris(3,5-disubstituted phenyl)phosphines and their isostructural PV oxides

Acta Crystallographica Section E: Crystallographic Communications, 2018
The crystal structures of tris(3,5-dimethylphenyl)phosphine (C24H27P), (I), tris(3,5-dimethylphenyl)phosphine oxide (C24H27OP), (II), tris(4-methoxy-3,5-dimethylphenyl)phosphine (C27H33O3P), (III), and tris(4-methoxy-3,5-dimethylphenyl)phosphine oxide ...
Nathan D. D. Hill, René T. Boeré
doaj   +1 more source

A Sensitive Impedimetric Sensor Based on Biosourced Polyphosphine Films for the Detection of Lead Ions

Chemosensors, 2020
In this work, impedimetric sensors were developed for the detection of the four WFD heavy metals Pb2+, Cd2+, Hg2+ and Ni2+, by the modification of a gold electrode with four partially biosourced polyphosphine polymers.
Taha Chabbah, Houyem Abderrazak, Radhia Souissi, Patrice Saint-Martin, Herve Casabianca, Saber Chatti, Regis Mercier, Ilhem Rassas, Abdelhamid Errachid, Mohamed Hammami, Nicole Jaffrezic-Renault   +10 more
doaj   +1 more source

Secondary Phosphine Oxide Functionalized Gold Clusters and their Application in Photoelectrocatalytic Hydrogenation Reactions

, 2021
Ligands in ligand-protected metal clusters play a crucial role, not only because of their interaction with the metal core, but also because of the functionality they provide to the cluster.
Nicola, Pinna, Yu, Wang, Xiao-He, Liu, Beatrice, Cula, Rongbin, Wang, Zhe-Ning, Chen, Qing-Yun, Chen, Norbert, Koch   +7 more
core   +1 more source

Biphenylic Bisphosphines through ortho-Metalation of Aryldiphenylphosphine Oxides

CHIMIA, 1996
Diphenyl-(2-trifluoromethyl)phosphine oxide was metalated next to the diphenylphosphinoyl group with LITMP. Upon iodination and Ullmann coupling, the corresponding 3,3?-disubstituted bis(phosphine oxide) was obtained. When phenyllithium was used
Olivier Desponds
doaj   +2 more sources