Results 1 to 10 of about 131,045 (252)

Phosphine Organocatalysis [PDF]

Chemical Reviews, 2018
The hallmark of nucleophilic phosphine catalysis is the initial nucleophilic addition of a phosphine to an electrophilic starting material, producing a reactive zwitterionic intermediate, generally under mild conditions. In this Review, we classify nucleophilic phosphine catalysis reactions in terms of their electrophilic components. In the majority of
Hongchao Guo, Zhanhu Sun, Ohyun Kwon
exaly   +5 more sources

Confirmation of circumstellar phosphine [PDF]

The Astrophysical Journal, 2014
Phosphine (PH3) was tentatively identified a few years ago in the carbon star envelopes IRC+10216 and CRL2688 from observations of an emission line at 266.9 GHz attributable to the J=1-0 rotational transition.
Agundez, M., Cernicharo, J., Decin, L., Encrenaz, P., Teyssier, D.   +4 more
core   +7 more sources

Coordination chemistry with phosphine and phosphine oxide-substituted hydroxyferrocenes

Dalton Transactions, 2010
New unsymmetrical hydroxyferrocenes were synthesised from dibromoferrocene. The oxygen heteroatom was introduced via lithiation and quenching with bis-trimethylsilylperoxide followed by hydrolysis to unmask the hydroxyl functionality. The coordination chemistry of 1'-(diphenylphosphino)-1-hydroxyferrocene 2 was explored with palladium and rhodium ...
Adeleke, Akabori, Allgeier, Andrew J. P. White, Atkinson, Atkinson, Atkinson, Barbaro, Bianchini, Braunstein, Butler, Butler, Chavez, Colacot, Colacot, Doherty, Dong, Dyer, Elschenbroich, Gibson, Gibson, Gibson, Gregson, Hamada, Herberhold, Herberhold, Johnson, Johnson, Liu, Long, Long, Long, Malinoski, Nesmeyanov, Nicholas J. Long, Onishi, Pickett, Riant, Robert C. J. Atkinson, Shafir, Siemeling, Stepnicka, Stepnicka, Tauchman, Teo, Vernon C. Gibson, Weng, Zhang   +47 more
core   +5 more sources

Phosphine‐Stabilized Pnictinidenes [PDF]

Chemistry – A European Journal, 2021
AbstractThe reaction of the intramolecular germylene‐phosphine Lewis pair (o‐PPh2)C6H4GeAr* (1) with Group 15 element trichlorides ECl3 (E=P, As, Sb) was investigated. After oxidative addition, the resulting compounds (o‐PPh2)C6H4(Ar*)Ge(Cl)ECl2 (2: E=P, 3: E=As, 4: E=Sb) were reduced by using sodium metal or LiHBEt3.
Raiser, Dominik, Eichele, Klaus, Schubert, Hartmut, Wesemann, Lars   +3 more
openaire   +2 more sources

Two-year observations of the Jupiter polar regions by JIRAM on board Juno [PDF]

, 2020
We observed the evolution of Jupiter's polar cyclonic structures over two years between February 2017 and February 2019, using polar observations by the Jovian InfraRed Auroral Mapper, JIRAM, on the Juno mission.
Adriani, A., Altieri, F., Atreya, S. K., Bolton, S. J., Bracco, A., Cicchetti, A., Dinelli, B. M., Filacchione, G., Grassi, D., Ingersoll, A., Lunine, J. I., Migliorini, A., Moriconi, M. L., Mura, A., Noschese, R., Orton, G., Piccioni, G., Plainaki, C., Sindoni, G., Sordini, R., Tosi, F., Turrini, D.   +21 more
core   +3 more sources

Tris(hydroxypropyl)phosphine Oxide: A Chiral Three-Dimensional Material with Nonlinear Optical Properties [PDF]

, 2010
The achiral C_(3v) organic phosphine tris(hydroxypropyl)phosphine oxide (1) crystallizes in the unusual chiral hexagonal space group P6_3. The structure is highly ordered because each phosphine oxide moiety forms three hydrogen bonds with adjacent ...
Durrell, Alec C., Gray, Harry B., Hazari, Nilay, Incarvito, Christopher D., Liu, Jian, Yan, Elsa C. Y.   +5 more
core   +2 more sources

‘User-friendly’ primary phosphines and an arsine: synthesis and characterization of new air-stable ligands incorporating the ferrocenyl group [PDF]

, 2002
Reaction of FcCH₂CH₂P(O)(OH)₂ or FcCH₂P(O)(OH)(OEt) [Fc=Fe(η⁵-C₅H₄)(η⁵-C₅H₅)] with excess CH₂N₂ followed by reduction with Me₃SiCl–LiAlH₄ gives the air-stable primary phosphines FcCH₂CH₂PH₂ and the previously reported analogue FcCH₂PH₂ in high yields ...
Alley, Steven R., Henderson, William
core   +2 more sources

The Living ROMP of trans-Cyclooctene [PDF]

, 2009
The living ring-opening metathesis polymerization (ROMP) of trans-cyclooctene (tCO) was investigated. ROMP of tCO in the presence of PPh_3 in THF leads to the formation of narrowly dispersed polycyclooctene (PCO).
Conrad, Rosemary M., Grubbs, Robert H., Walker, Ron   +2 more
core   +2 more sources

Phosphonate–Phosphinate Rearrangement

The Journal of Organic Chemistry, 2015
LiTMP metalated dimethyl N-Boc-phosphoramidates derived from 1-phenylethylamine and 1,2,3,4-tetrahydronaphthalen-1-ylamine highly selectively at the CH3O group to generate short-lived oxymethyllithiums. These isomerized to diastereomeric hydroxymethylphosphonamidates (phosphate–phosphonate rearrangement).
Qian, Renzhe, Roller, Alexander, Hammerschmidt, Friedrich   +2 more
openaire   +2 more sources

Electrochemistry of ferrocenylphosphines FcCH₂PR₂ (Fc=(η⁵-C₅H₅)Fe(η⁵-C₅H₄); R=Ph, CH₂OH and CH₂CH₂CN), and some phosphine oxide, phosphine sulfide, phosphonium and metal complex derivatives [PDF]

, 2003
Electrochemical studies of the free ferrocenylphosphine ligands FcCH₂PR₂ (Fc=(η⁵-C₅H₅)Fe(η⁵-C₅H₄); R=Ph, CH₂OH and CH₂CH₂CN) and some phosphine oxide, phosphine sulfide, phosphonium and metal derivatives are described.
Downard, Alison J., Goodwin, Nicholas J., Henderson, William   +2 more
core   +2 more sources