Results 1 to 10 of about 103,808 (305)

Decachlorohexa-1,5-diene [PDF]

open access: yesActa Crystallographica Section E, 2012
The title compound, C6Cl10, cystallizes in a nearly C2-symmetrical gauche conformation. Both trichlorovinyl groups are nearly planar [Cl—C—C—Cl torsion angles = −178.47 (12) and −179.93& ...
Dieter Schollmeyer, Heiner Detert
doaj   +3 more sources

Reactivity and Stereoselectivity in the Inverse-Electron-Demand Diels–Alder Reaction of 1-Aza-1,3-Butadiene [PDF]

open access: yesMolecules
The reactivity and stereoselectivity in the inverse-electron-demand Diels–Alder reaction between 4-methoxycarbonyl-N-(phenylsulfonyl)-1-aza-1,3-butadiene and methoxyethene was examined using density functional theory (DFT) calculations at the M06-2X ...
Ken Sakata, Yui Go, Takeshi Yoshikawa
doaj   +2 more sources

Hetero-Diels–Alder Ligation (HDAL) of C20 Nanocage and Anti-Tumor Oxoindoline in Gas Phase and Solvent Phase, Using Density Functional Theory (DFT) [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2023
In this computational research, the solvent effect is probed on HDAL of C20 with I to yield Ia compound. So, in going from the gas phase to non-polar, and in turn to the polar solvent, a good consistency appears between the dielectric constant of the ...
Mohammad Poor Heravi   +6 more
doaj   +1 more source

Comparative Analysis of Ethylene/Diene Copolymerization and Ethylene/Propylene/Diene Terpolymerization Using Ansa-Zirconocene Catalyst with Alkylaluminum/Borate Activator: The Effect of Conjugated and Nonconjugated Dienes on Catalytic Behavior and Polymer Microstructure

open access: yesMolecules, 2021
The copolymerization of ethylene‒diene conjugates (butadiene (BD), isoprene (IP) and nonconjugates (5-ethylidene-2-norbornene (ENB), vinyl norbornene VNB, 4-vinylcyclohexene (VCH) and 1, 4-hexadiene (HD)), and terpolymerization of ethylene-propylene ...
Amjad Ali   +9 more
doaj   +1 more source

Screening of Palladium/Charcoal Catalysts for Hydrogenation of Diene Carboxylates with Isolated-Rings (Hetero)aliphatic Scaffold

open access: yesMolecules, 2023
A series of seven palladium-containing composites, i.e., four Pd/C and three Pd(OH)2/C (Pearlman’s catalysts), was prepared using modified common approaches to deposition of Pd or hydrated PdO on charcoal.
Vladyslav V. Subotin   +10 more
doaj   +1 more source

Difunctionalization of Dienes, Enynes and Related Compounds via Sequential Radical Addition and Cyclization Reactions

open access: yesMolecules, 2023
Radical reactions are powerful in creating carbon–carbon and carbon–heteroatom bonds. Designing one-pot radical reactions with cascade transformations to assemble the cyclic skeletons with two new functional groups is both synthetically and operationally
Sanjun Zhi, Hongjun Yao, Wei Zhang
doaj   +1 more source

Boron and Silicon-Substituted 1,3-Dienes and Dienophiles and Their Use in Diels-Alder Reactions

open access: yesMolecules, 2020
Boron and silicon-substituted 1,3-dienes and boron and silicon-substituted alkenes and alkynes have been known for years and the last 10 years have seen a number of new reports of their preparation and use in Diels-Alder reactions.
Mark E. Welker
doaj   +1 more source

Research on Soft-Sensing Methods for Measuring Diene Yields Using Deep Belief Networks

open access: yesInternational Journal of Chemical Engineering, 2022
As an important raw material for the chemical industry, ethylene is one of the surest indicators that measure the development level of a country. The diene yield is an important production quality index parameter of ethylene units, and it is very ...
Xiangwu Deng, Zhiping Peng, Delong Cui
doaj   +1 more source

Conceptual DFT study based on the characterization of the local electrophilicity and nucleophilicity for intramolecular Diels-Alder reaction of the trans isomers of 4-[(4E)-4,6-heptadien-1-yl]-2-cyclohepten-1-one [PDF]

open access: yesJournal of the Serbian Chemical Society
One of the most powerful methods for the rapid synthesis and formation of complex polycyclic molecules with biological interest involves the use of Diels–Alder (DA) reaction especially its intramolecular variant.
Temer Imane   +2 more
doaj   +1 more source

Formation of bridged bicycloalkenes via ring closing metathesis [PDF]

open access: yes, 1998
Ring closing metathesis may be used in the formation of small ring bicycloalkenes from monocyclic diene ...
Grubbs, Robert H., Morehead, Andrew, Jr.
core   +1 more source

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