Results 111 to 120 of about 4,166 (227)

N─H or O─H Bond Activation With a Bicyclic Si4 Ring Compound

Chemistry – A European Journal, EarlyView.
The bicyclic Si4 ring compound with zwitterionic character reacts with NH3, H2O, and selected alcohols to give functionalized saturated silicon rings, siliconoid clusters with unsubstituted Si atoms, or simple 1,3‐addition products. The experimentally observed reactivity could be rationalized based on results from mechanistic calculations employing ...
Michael Quest, Florian Schreiner, Alexander Hepp, Constantin G. Daniliuc, Kasperi M. Salonen, Janne Körkkö, Heikki M. Tuononen, Felicitas Lips   +7 more
wiley   +1 more source

Computational Investigation about the Effects of Solvent Polarity and Chalcogen Element Electronegativity on ESIPT Behaviors for the Et₂N-Substituted Flavonoid

Molecules
Inspired by the outstanding nature of flavonoid derivatives in the fields of chemistry and medicine, in this work we mainly focus on exploring the photo-induced properties of the novel Et2N-substituted flavonoid (ENF) fluorophore theoretically ...
Tuo Chang, Fang Yang, Tangyan Chen
doaj   +1 more source

Chalcogen Bond Mediated Enhancement of Cooperative Ion-Pair Recognition. [PDF]

Angew Chem Int Ed Engl, 2020
Bunchuay T, Docker A, Eiamprasert U, Surawatanawong P, Brown A, Beer PD.   +5 more
europepmc   +1 more source

Deriving General Energy Predictors for Pnictogen Bonding

Chemistry – A European Journal, EarlyView.
This study derives general energetic predictors for pure pnictogen bonds from nitrogen to bismuth based on the potential energy density at the bond critical point. The research highlights the increasing occurrence of secondary interactions for heavier elements.
Jan Langwald, Antonio Frontera
wiley   +1 more source

Unveiling σ- and π-hole interactions in COSe-XCN (X = F, Cl, Br, and I): Theoretical insights into halogen substitution effects

Results in Chemistry
XCN molecules (X = F, Cl, Br, I) are linear pseudohalogen species containing a reactive and toxic cyanide group. Their high electrophilicity and toxicity limit experimental studies.
Mohammadmehdi Moradkhani, Yunes Abbasi Tyula, Yosra Moradkhani   +2 more
doaj   +1 more source

Multi‐state Photoswitching in Thienoquinoid‐Based Fluorescent Trithiophenes

Chemistry – A European Journal, EarlyView.
A methine‐bridged trithiophene with a thienoquinoid core undergoes photoisomerization of both C═C bonds, affording three geometrical isomers in a ratio controlled by the irradiation wavelength. Despite full π‐conjugation, the system retains fluorescence, enabling wavelength‐addressable multi‐state switching with luminescent readout.
Rio Nishimura, Stefan Hecht, Shohei Saito, Ken‐ichi Yamashita   +3 more
wiley   +1 more source

Introduction and Extension of the Unified Theory of Multicenter Bonding: The Role of the Charge-Shift Bonding

Molecules
Classical chemical bonding is typically categorized into primary, strong interactions, such as covalent, ionic, and metallic bonds, and secondary, weak interactions, such as van der Waals forces, the hydrogen bond, and their likes (halogen bond ...
Francisco Javier Manjón, Hussien H. Osman, Álvaro Lobato, Fernando Izquierdo-Ruiz, Enrico Bandiello, Samuel Gallego-Parra, Ángel Vegas, Matteo Savastano, Alfonso Muñoz   +8 more
doaj   +1 more source

From Charge‐Transfer Adducts to (Tri)Halide‐Templated Supramolecular Cages: Covalent vs Ionic Products in the Reactions of Pyridin‐4‐ylthio‐Substituted Tetrathiafulvalene With Dihalogens and Interhalogens

Chemistry – A European Journal, EarlyView.
The reactions between tetra(pyridin‐4‐ylthio)tetrathiafulvalene and Br2/I2/ICl/IBr led to a variety of products, including a rare example of neutral 1:4 CT adduct and ionic products showing supramolecular cage motifs at (tri)halide templates. The nature of the reaction products was elucidated based on XRD analysis, Raman spectroscopy and QTAIM, NCI ...
Anna Caria, Stéphane A. Baudron, M. Carla Aragoni, Vito Lippolis, Anna Pintus, Enrico Podda, Massimiliano Arca   +6 more
wiley   +1 more source

Achievement of Transition Metal Chalcogenides/Oxides in Hydrogen Production by Seawater Electrolysis

EcoEnergy, EarlyView.
Transition metal chalcogenides (TMCs)/oxides have shown great application potential in seawater splitting for hydrogen generation due to their adjustable electronic properties, abundant active sites, and excellent catalytic performance. ABSTRACT Under the impetus of global “dual carbon” goals, green hydrogen has become a key component of the future ...
Xiaohui Du, Xinyu Li, Jianna Li, Tao Sun
wiley   +1 more source

The Carbonyl⋅⋅⋅Tellurazole Chalcogen Bond as a Molecular Recognition Unit: From Model Studies to Supramolecular Organic Frameworks. [PDF]

Angew Chem Int Ed Engl, 2020
Mehrparvar S, Wölper C, Gleiter R, Haberhauer G.   +3 more
europepmc   +1 more source