Results 21 to 30 of about 830,676 (348)

Kinetics and Products of the Acid-Catalyzed Ring-Opening of Atmospherically Relevant Butyl Epoxy Alcohols [PDF]

open access: yes, 2010
Epoxydiols are produced in the gas phase from the photo-oxidation of isoprene in the absence of significant mixing ratios of nitrogen oxides (NO_x). The reactive uptake of these compounds onto acidic aerosols has been shown to produce secondary organic ...
Eddingsaas, Nathan C.   +2 more
core   +2 more sources

Intramolecular pi-pi stacking interactions in 2-substituted N,N-dibenzylaziridinium ions and their regioselectivity in nucleophilic ring-opening reactions [PDF]

open access: yes, 2009
The ring opening of 2-substituted N,N-dibenzylaziridinium ions by bromide is known to occur exclusively at the Substituted aziridine carbon atom via ail S(N)2 mechanism, whereas the opposite regioselectivity has been observed as the main pathway for ring
Catak, Saron   +4 more
core   +2 more sources

Two-Dimensional Controlled Syntheses of Polypeptide Molecular Brushes via N-Carboxyanhydride Ring-Opening Polymerization and Ring-Opening Metathesis Polymerization. [PDF]

open access: yes, 2017
Well-defined molecular brushes bearing polypeptides as side chains were prepared by a "grafting through" synthetic strategy with two-dimensional control over the brush molecular architectures.
Borguet, Yannick P   +7 more
core   +1 more source

Facile Synthesis of Effcient and Selective Ruthenium Olefin Metathesis Catalysts with Sulfonate and Phosphate Ligands [PDF]

open access: yes, 2010
A series of novel, air-stable ruthenium NHC catalysts with sulfonate and phosphate anions have been prepared easily in one pot at high yields using commercially available precursors.
Grubbs, Robert H., Teo, Peili
core   +1 more source

Curing of bisphenol A-aniline based benzoxazine using phenolic, amino and mercapto accelerators

open access: yeseXPRESS Polymer Letters, 2015
The curing of bisphenol A-aniline based benzoxazine was studied applying different accelerators (4,4'-thiodiphenol, o-dianisidine, 2-mercaptobenzimidazole and 4-mercaptophenol) to initiate the catalytic ring-opening of benzoxazine.
A. Rucigaj   +3 more
doaj   +1 more source

Cure kinetics of ring-opening metathesis polymerization of dicyclopentadiene [PDF]

open access: yes, 2002
The cure kinetics of polydicyclopentadiene (pDCPD) prepared by ring-opening metathesis polymerization with three different concentrations of Grubbs' catalyst was examined using differential scanning calirimetry (DSC).
Kessler, Michael R., White, Scott R.
core   +1 more source

Synthetic and theoretical studies of novel ring closure and ring opening reactions [PDF]

open access: yes, 2006
Ring closure and ring opening reactions are in many cases useful synthetic procedures in organic chemistry. They allow the preparation of complex molecules with high stereoselectivity and good yields. Mechanistic and theoretical studies have been carried
González Rosende, Mª Eugenia   +1 more
core   +1 more source

Control of Multi-level Voltage States in a Hysteretic SQUID Ring-Resonator System [PDF]

open access: yes, 2004
In this paper we study numerical solutions to the quasi-classical equations of motion for a SQUID ring-radio frequency (rf) resonator system in the regime where the ring is highly hysteretic. In line with experiment, we show that for a suitable choice of
A. Barone   +9 more
core   +3 more sources

Photosonochemical catalytic ring opening of α-epoxyketones

open access: yesBeilstein Journal of Organic Chemistry, 2007
The combination of ultrasound and photochemical methods has been used for the catalytic ring opening of α-epoxyketones by 1-benzyl-2,4,6-triphenylpyridinium tetrafluoroborate (NBTPT) as photocatalyst in methanol.
Hamid R. Memarian, Ali Saffar-Teluri
doaj   +1 more source

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