Results 121 to 130 of about 70,860 (329)

Metal Promoted Cyclocarbonylation Reactions in the Synthesis of Heterocycles [PDF]

, 2022
Laura Antonella Aronica
openalex   +1 more source

Halogen‐Bond Coupled Halogenated‐π‐Conjugation Enables Giant Birefringence in Hydrogen‐Bonded Organic Frameworks

Advanced Science, EarlyView.
The perfect crystal packing achieved via the halogen‐bond (XB) coupled halogenated‐π‐conjugation strategy effectively induces an ultrahigh birefringence (Δn = 0.97), which exhibits promising potential in polarization control and phase modulation.
Miao‐Bin Xu, Yun‐Xia Hu, Ming‐Chang Wang, Jia‐Jia Li, Jia‐Min Lian, Jin Chen, Ke‐Zhao Du   +6 more
wiley   +1 more source

(1R*,2R*,5R*,6S*)-6-Bromo-9-oxabicyclo[3.3.1]nonan-2-ol

IUCrData
Both six-membered rings in the title bicyclo[3.3.1] system, C8H13BrO2, adopt a chair conformation. Hydrogen bonds from the hydroxy group to the ether bridge connect the molecules into zigzag chains: single-enantiomer chains propagating along the b-axis ...
Lea Simon, Heiner Detert, Dieter Schollmeyer   +2 more
doaj   +1 more source

Recent Advances in Metal-Free Quinoline Synthesis

Molecules, 2016
The quinoline ring system is one of the most ubiquitous heterocycles in the fields of medicinal and industrial chemistry, forming the scaffold for compounds of great significance.
Ginelle A. Ramann, Bryan J. Cowen
doaj   +1 more source

BENZOXAZASTIBININES: NOVEL SIX-MEMBERED HETEROCYCLES [PDF]

, 1996
Satnam Singh, Ν. K. Jha
openalex   +1 more source

Synthesis and optoelectronic properties of new ethynylated pyrazine derivatives [PDF]

, 2003
Several diaryleneethynylpyrazine derivatives, in which the pyrazine unit is electron-deficient, have been synthesised using Sonogashira palladium-catalysed cross-coupling reactions.
Zhao, Liang
core  

Dual Effect of Steric Hindrance in Non‐Aqueous Amine Absorbents: Navigating the Trade‐Off Between Kinetics and Thermodynamics for Efficient CO2 Capture

Advanced Science, EarlyView.
This study elucidates how steric hindrance in amines creates a dual effect in CO2 capture: it thermodynamically favors the reaction by shifting the pathway from carbamate to alkyl carbonate formation, increasing capacity and lowering regeneration heat, while simultaneously slightly slowing the kinetics.
Xiaoyi Gao, Bin Xu, Xi Tang, Muyi Li, Cong Luo, Fan Wu, Xiaoshan Li, Liqi Zhang, Wen Chen   +8 more
wiley   +1 more source

Synthesis and Characterization of Unusual S=1 Fe(0)‐Silyl Complexes Supported by Styrene Ligands

Angewandte Chemie, EarlyView.
Despite the long‐standing importance of iron‐silicon bonds as related to catalysis, high‐spin Fe(0)‐silyl complexes remain a historical synthetic challenge in the field. Herein, we report the first series of high‐spin S = 1, styrene‐stabilized Fe(0)‐silyl complexes followed by extensive characterization via Mössbauer spectroscopy, single crystal X‐ray ...
Alexis K. Bauer, Agamemnon E. Crumpton, Michael L. Neidig   +2 more
wiley   +2 more sources

Types and properties of metal-free catalysts for living polymerizations of biomaterials [PDF]

, 2008
Syntéza biokompatibilních a biodegradabilních polyesterů, použitelných převážně v medicíně, využívá pro polymeraci za otevření kruhu katalyzátory na bázi kovu (např. Sn, Al atd.), které se mohou po implantaci deponovat v těle.
Repka, Martin
core  

Interplay of Backbone Conformation, Morphology and Thermoelectric Properties of Benzodifuranone‐Isatin Acceptor Polymers

Advanced Electronic Materials, EarlyView.
Modification of polymer backbone via halogenation and comonomer selection leads to conjugated backbones of different stereoelectronic properties, thin film morphologies, and electrical characteristics. The interplay of conformational isomerism, coplanarity, backbone curvature, backbone orientation, and ordering in thin films, electrical conductivity ...
Diego R. Hinojosa, Nathan J. Pataki, Francesca Pallini, Guillaume Freychet, Andreas Erhardt, Kevin Schuller, Selina Olthof, Klaus Meerholz, Christopher R. McNeill, Mario Caironi, Florian Günther, Michael Sommer   +11 more
wiley   +1 more source