Results 41 to 50 of about 123,983 (385)

Metal-free syn-dioxygenation of alkenes [PDF]

open access: yes, 2013
Reactions employing inexpensive reagents from sustainable sources and with low toxicity are becoming increasingly desirable from an academic and industrial perspective.
Ashikari   +60 more
core   +1 more source

Alternative pathways to α,β-unsaturated ketones via direct oxidative coupling transformation using Sr-doped LaCoO3 perovskite catalyst [PDF]

open access: yesRoyal Society Open Science, 2019
A strontium-doped lanthanum cobaltite perovskite material was prepared, and used as a recyclable and effective heterogeneous catalyst for the direct oxidative coupling of alkenes with aromatic aldehydes to produce α,β-unsaturated ketones.
Khang H. Trinh   +7 more
doaj   +1 more source

Analysis of Oleogel Volatile Profile Formation under Ultrasonic Treatment

open access: yesGels, 2023
Under certain conditions, ultrasonic treatment of certain foods and ingredients can contribute to the appearance of an extraneous odor, which is not usual for them, especially in fat-containing products.
Yuliya Frolova   +2 more
doaj   +1 more source

Rate coefficient for the reaction of Cl atoms with cis-3-hexene at 296 ± 2 K [PDF]

open access: yes, 2017
The rate coefficient of the cis-3-hexene + Cl atoms reaction at 296 ± 2 K and 750 ± 10 Torr was determined using the relative rate technique. The reaction was investigated using an 80 L Teflon reaction bag and a gas chromatograph coupled with flame ...
Arbilla, Graciela   +5 more
core   +1 more source

Access to cyclopropanes with geminal trifluoromethyl and difluoromethylphosphonate groups

open access: yesBeilstein Journal of Organic Chemistry, 2023
A synthetic route to the bench-stable fluorinated masked carbene reagent diethyl 2-diazo-1,1,3,3,3-pentafluoropropylphosphonate, bearing a trifluoromethyl and a difluoromethyl group is reported for the first time.
Ita Hajdin   +5 more
doaj   +1 more source

Characterization of carbon monoxide, methane and nonmethane hydrocarbons in emerging cities of Saudi Arabia and Pakistan and in Singapore [PDF]

open access: yes, 2016
We investigate the composition of 63 C2-C10 nonmethane hydrocarbons (NMHCs), methane (CH4) and carbon monoxide (CO), in Jeddah, Mecca, and Madina (Saudi Arabia), in Lahore, (Pakistan), and in Singapore. We established a database with which to compare and
Aburizaiza, Omar S   +11 more
core   +1 more source

Desulfitative Thioalkylation of Alkenes

open access: yesAdvanced Synthesis & Catalysis, 2020
AbstractAn efficient method for the thioalkylation of alkenes via radical desulfitative sulfur‐group transfer is described. The reaction is based on the use of readily available thiosulfonates as starting materials and cheap radical initiators such as dilauroyl peroxide (DLP) and sun lamp irradiation.
Philippe Renaud   +3 more
openaire   +3 more sources

Power-dependent speciation of volatile organic compounds in aircraft exhaust [PDF]

open access: yes, 2012
As part of the third NASA Aircraft Particle Emissions Experiment (APEX-3, November 2005), whole air samples were collected to determine the emission rates of volatile organic compounds (VOCs) from aircraft equipped with three different gas-turbine ...
Anderson, BE   +6 more
core   +1 more source

Palladium-Catalyzed Cross-Coupling Reactions of Borylated Alkenes for the Stereoselective Synthesis of Tetrasubstituted Double Bond

open access: yesOrganics, 2022
The stereoselective formation of tetrasubstituted alkenes remains one of the key goals of modern organic synthesis. In addition to other methods, the stereoselective synthesis of tetrasubstituted alkenes can be achieved by means of cross-coupling ...
Tomáš Tobrman, Sergej Mrkobrada
doaj   +1 more source

Kinetics of the simplest Criegee intermediate reaction with ozone studied by mid-infrared quantum cascade laser spectrometer [PDF]

open access: yesPhysical Chemistry Chemical Physics (2017), 2017
The kinetics of CH$_2$OO reaction with ozone has been studied by monitoring CH$_2$OO with time-resolved infrared (IR) absorption spectroscopy, which utilized fast chirped IR pulse train from a quantum cascade laser [J. Chem. Phys. 146, 244302 (2017)].
arxiv   +1 more source

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