Results 81 to 90 of about 2,794,131 (212)

Photophysical Properties and Excited‐State Dynamics of Luminescent N,O‐Chelated Benzimidazole‐Based Boron Complexes

ChemPhotoChem, Volume 10, Issue 11, November 2026.
Brightly emissive N,O‐chelated benzimidazole‐based boron complexes exhibit high photoluminescence efficiency and characteristic excited‐state dynamics. Steady‐state and time‐resolved spectroscopic studies, supported by theoretical calculations, provide insight into their efficient fluorescence.
Sota Abe, Erina Hiramatsu, Tetsuro Katayama, Akihiro Furube, Atsushi Tabata, Yasushi Yoshida, Shoko Ueta, Shunta Nakamura, Yukihiro Arakawa, Keiji Minagawa, Fumitoshi Yagishita   +10 more
wiley   +1 more source

Substituent‐Guided Routing in Chemical Reaction Networks

ChemSystemsChem, Volume 8, Issue 6, November 2026.
Substituents act as molecular traffic directors, routing EDC‐fueled oligoesterification either into a constrained reversible dimer loop or through an interconnected, scrambling‐enabled network of higher oligomers. ABSTRACT Metabolism is a complex chemical reaction network (CRN) that distributes reaction flux across multiple pathways, and mimicking such
Yeonsoo Lim, Gyunam Park, Minho Lee, Gyeonghun Lee, Jonghwa Han, Yukyeong Lee, Jaeyoung Sung, Sunbum Kwon   +7 more
wiley   +1 more source

Bond Dissociation Energies and the Hammett Correlation, Part 1: Remotely Substituted Aromatic Compounds and Vitamin E

, 2020
: Four hundred and seventy nine experimental values of X Z bond dissociation energies (BDEs) of para-, ortho-, meta-, and multisubstituted aromatic compounds were reproduced by the following simple equations: Here X represents a wide variety of univalent
Yu-Ran Luo
core  

Modeling of the General Trends of Reactivity and Regioselectivity in Cyclopentadiene–Nitroalkene Diels–Alder Reactions

Molecules
This study presents a theoretical investigation of the electronic properties of mono- and pentasubstituted cyclopentadiene analogs and variously substituted conjugated nitroalkenes bearing electron-donating and electron-withdrawing groups.
Adrianna Fałowska, Stanisław Grzybowski, Daniel Kapuściński, Karol Sambora, Agnieszka Łapczuk   +4 more
doaj   +1 more source

Molybdooxaziridine Catalysis: Synthesis of α‐Hydroxysulfones From Styrenes Through an ATRA Process

European Journal of Organic Chemistry, Volume 29, Issue 39, 22 October 2026.
This work has discovered that molybdooxaziridine catalysts promote the hydroxysulfonation of substituted α‐methyl‐styrenes using N‐Ts‐hydroxylamine as the nitrogen source. An atom‐transfer‐radical‐addition mechanism involving the stepwise addition of Ts and hydroxy radicals takes place.
Alyssa N. Singer, Gustavo Moura‐Letts
wiley   +1 more source

Dynamic Effects May Affect Hammett Linear Free Energy Relationship [PDF]

, 2019
The aromatic nucleophilic substitution reaction in the Clayden rearrangement reaction has an abnormal Hammett linear free energy relationship1. Inspired by the concertedstepwise variation of the aromatic nucleophilic substitution reaction in 20182, we ...
Xinyu, Xu, Zongchang, Han
core   +1 more source

A.G. Hammett

, 1962
A.G.

core   +1 more source

Quantitative Analysis of Substituent Effects in Cu(II) and Co(II) Benzimidazole Complexes: Stability Constants Determined via Acetate-Mediated Synthesis and Benesi–Hildebrand Method Correlated with Hammett σ Parameters

Chemistry
This study presents a quantitative investigation of substituent effects on the stability of 1:2 complexes formed between para-substituted 2-phenylbenzimidazole ligands and Cu(II) or Co(II) ions.
Zoltán Köntös, Flóra Stedra, Viktória Ngo Hang   +2 more
doaj   +1 more source

Broadly Accessible and Highly Active Hydrophosphination Catalysis With Simple Calcium Compounds in DMSO Solution

ChemSusChem, Volume 19, Issue 19, 14 October 2026.
Simple calcium bis(amido) compounds are exceptionally potent hydrophosphination catalysts in DMSO solution. At ambient temperature or under irradiation, this catalyst successfully engages all manner of unsaturated substrates with primary and secondary phosphines with more than 100 examples of high conversion.
Moniruzzaman Moniruzzaman, Rory Waterman
wiley   +1 more source

Cross‐Dehydrogenative Coupling Reactions With Redox‐Active Guanidine Reagents

Chemistry – A European Journal, Volume 32, Issue 38, 13 October 2026.
ABSTRACT Cross‐dehydrogenative coupling (CDC) reactions are attractive and environmentally friendly ways to form new C‐C and other element‐element bonds. Here, we report the first CDC reactions triggered by a redox‐active guanidine reagent. N‐phenyltetrahydroisoquinoline and derivatives with electron‐donating and withdrawing substituents at the N ...
Petra Walter, Olaf Hübner, Hans‐Jörg Himmel   +2 more
wiley   +1 more source