Results 21 to 30 of about 20,876 (282)

1,2-Difunctionalized bicyclo[1.1.1]pentanes: Long–sought-after mimetics for ortho/meta-substituted arenes

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2021
Significance Bioisoteric replacements for aromatic rings to improve medicinal properties are in high demand. This work presents a comprehensive analysis of heretofore-inaccessible 1,2-difunctionalized bicyclo[1.1.1]pentanes from both chemical and ...
Jin-Xin Zhao   +14 more
semanticscholar   +1 more source

n-Heptane hydroconversion over sulfated-zirconia-supported molybdenum carbide catalysts [PDF]

open access: yes, 2016
Tertiary Education Trust Fund (TETFUND) NigeriaPeer reviewedPublisher ...
Anderson, J. A.   +2 more
core   +2 more sources

Synthesis of Bicyclo[1.1.0]butanes from Iodo-Bicyclo[1.1.1]pentanes.

open access: yesOrganic Letters, 2023
We describe a two-step process for the synthesis of substituted bicyclo[1.1.0]butanes. A photo-Hunsdiecker reaction generates iodo-bicyclo[1.1.1]pentanes under metal-free conditions at room temperature.
Michael D. Mandler   +13 more
semanticscholar   +1 more source

A five year record of high-frequency in situ measurements of non-methane hydrocarbons at Mace Head, Ireland [PDF]

open access: yes, 2011
Continuous high-frequency in situ measurements of a range of non-methane hydrocarbons have been made at Mace Head since January 2005. Mace Head is a background Northern Hemispheric site situated on the eastern edge of the Atlantic. Five year measurements
Derwent, R. G.   +7 more
core   +3 more sources

INCREASING THE EFFECTIVENESS OF STABILIZATION COLUMNS IN THE OIL AND GAS INDUSTRY

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2018
According to the results of the study, we found that increasing the pressure in a stabilization column improves the sharpness of separation of butanes from pentanes. As a result, the product quality is getting better.
D. B. Ermolin   +2 more
doaj   +1 more source

Asymmetric synthesis of 2-substituted oxetan-3-ones via metalated SAMP/RAMP hydrazones [PDF]

open access: yes, 2013
2-Substituted oxetan-3-ones can be prepared in good yields and enantioselectivities (up to 84% ee) by the metalation of the SAMP/RAMP hydrazones of oxetan-3-one, followed by reaction with a range of electrophiles that include alkyl, allyl, and benzyl ...
Beasley, Benjamin   +3 more
core   +1 more source

Synthesis and Characterization of Three-Coordinate Ni(III)-Imide Complexes [PDF]

open access: yes, 2011
A new family of low-coordinate nickel imides supported by 1,2-bis(di-tert-butylphosphino)ethane was synthesized. Oxidation of nickel(II) complexes led to the formation of both aryl- and alkyl-substituted nickel(III)-imides, and examples of both types ...
Anderson, John S.   +5 more
core   +2 more sources

Improving gasoline quality produced from MIDOR light naphtha isomerization unit

open access: yesEgyptian Journal of Petroleum, 2017
Isomerization process became one of the best gasoline production sources, as it gives a high octane product while saving environment from pollution impacts.
M.F. Mohamed   +3 more
doaj   +1 more source

Increasing LPG production by adding volatile hydrocarbons to reduce import gap in Egypt

open access: yesJournal of Petroleum Exploration and Production Technology, 2020
Liquefied petroleum gas (LPG) becomes popular in the twentieth century as source of energy, since it is economically feasible to be produced, transported, sold and stored as a liquid fuel.
Ahmed M. Shahin   +2 more
doaj   +1 more source

C1-C8 volatile organic compounds in the atmosphere of Hong Kong: Overview of atmospheric processing and source apportionment [PDF]

open access: yes, 2007
We present measurements of C1-C8 volatile organic compounds (VOCs) at four sites ranging from urban to rural areas in Hong Kong from September 2002 to August 2003. A total of 248 ambient VOC samples were collected.
Barletta, B   +5 more
core   +1 more source

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