Results 141 to 150 of about 33,209 (285)

The autoignition of cyclopentane and cyclohexane in a shock tube

open access: yes, 2007
Ignition delay times of cyclohexane-oxygen-argon and cyclopentane-oxygen-argon mixtures have been measured in a shock tube, the onset of ignition being detected by OH radical emission.
Battin-Leclerc, Frédérique   +6 more
core   +1 more source

Electrochemical Oxidative Radical Polar Crossover Route to 1,4‐Keto Carboxylates Mediated by Anchimeric Assistance

open access: yesChemistry – A European Journal, Volume 31, Issue 41, July 22, 2025.
In this work we developed an electrochemical method for 1,4‐dioxygenated compounds, offering broad scope, functional group compatibility, and diastereoselectivity. Abstract The 1,4‐keto carboxylate scaffold is present in the structure of many biologically relevant compounds.
Ian MacLean   +5 more
wiley   +1 more source

Vibrational Partition Functions from Bond Order and Populations Relationships

open access: yesChemPhysChem, Volume 26, Issue 14, July 18, 2025.
A new computational model is presented that predicts vibrational partition functions using bond orders and populations relationships (QBOP). This model demonstrates that thermochemical energy contributions can be reasonably approximated based on well‐conditioned orbital populations without the need for a costly Hessian calculation.
Barbaro Zulueta, John A. Keith
wiley   +1 more source

ROLE OF Mn(TPP)Cl IN THE EPOXIDATION WITH SINGLET OXYGEN [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2000
Mn(TPP)Cl catalyzes cooxidation of olefin in the singlet oxygenation of sulfid. Mn(TPP)Cl is able to transfer an oxygen atom from a peroxidic intermediate generated in singlet oxygenation of sulfide to a metal ion affording metal 0x0 species which is ...
doaj  

En Route Toward Sustainable Polycarbonates via Large Cyclic Carbonates

open access: yesChemSusChem, Volume 18, Issue 14, July 17, 2025.
The use of safe carbonylating agents, allowed by a suitable (bio)catalytic systems, affords the sustainable and green synthesis of large‐ring cyclic carbonates by reaction of renewables such as bio‐based diols. These carbonates are prone to ring‐opening polymerization paving the way for the production of circular aliphatic polycarbonates.
Francesco Della Monica   +5 more
wiley   +1 more source

Pathways to Aromatics in the Catalytic Pyrolysis of a Polyvinylchloride Model Compound Revealed by Operando Photoelectron Photoion Coincidence Spectroscopy

open access: yesChemSusChem, Volume 18, Issue 14, July 17, 2025.
How are aromatics formed during catalytic PVC pyrolysis? By utilizing photoelectron photoion coincidence spectroscopy, the cross‐linking reaction mechanism is unveiled to proceed via butadiene dimerization and trimerization, yielding 5‐ or 6‐membered ring species, which are the precursors for benzene, toluene, and xylenes.
Jovanni Cabana   +16 more
wiley   +1 more source

Ladungsrelokalisierung ermöglicht eine modulare und diastereoselektive Synthese von cis‐substituierten Tetrahydrofuranen

open access: yesAngewandte Chemie, Volume 137, Issue 29, July 14, 2025.
Die Synthese von 2,5‐cis‐disubstituierten Tetrahydrofuranen (THFs) und anderen THF‐Derivaten wird über einen retrosynthetischen Ansatz ermöglicht, bei dem aus Acylchloriden erzeugte Acyliumionen mit verschiedenen Alkenen behandelt werden. Ein Ladungsrelokalisierungprozess führt zur Bildung von Oxocarbenium‐Ionen, die zu den gewünschten THF‐Strukturen ...
Zhi‐Jie Niu   +4 more
wiley   +1 more source

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