Results 131 to 140 of about 48,292 (273)
Angewandte Chemie, EarlyView.Azidoborylene photolysis results in the isolation of a reactive C═B═N═C heterocumulene bearing an ambiphilic boron centre. Addition of 3O2 to this species results in the clean conversion to a unique example of a dioxaborirane. ABSTRACT Oxidation of the formal boron(0) complex MeCAAC2B in the presence of tetrabutylammonium azide leads to the formation ...
Hayley King +4 more
wiley +2 more sources
Synthesis and characterization of aggregated nano-cobalt particles by bottom up approach
, 2012 This paper reports a novel process for the synthesis of nano-sized cobalt particles by a bottom-up approach. Cobalt chloride has been reduced using hydrazine as the precursor, in a basic medium maintained at 700C.
Haque, Kazi +3 more
core
Melt strain hardening is an interesting characteristic property of the elongational flow of polymers. While strain hardening of many unmodified polymer melts has been widely discussed, a comprehensive presentation of the influence of particles on this ...
Münstedt, Helmut
core +1 more source
, 2010 The freezing and penetration of molten core fuel and structural materials penetrating into flow channels are important thermal-hydraulics phenomena to safety assessment of postulated core disruptive accidents in liquid metal reactors.
Kenji Fukuda +7 more
core +1 more source
AbstractWe provide a microscopic motivation for Postulate P4 of Vacuum–Energonic Relativity (VER),according to which a test body carries the invariantµ ≡m(x)c(x) = const,Spp = −µ∫d˜s.The central question addressed in this paper is why, within the vacuum-EFT logic of QFT-VER,the natural invariant of the test sector is mc, rather than m or mc2.We argue ...
openaire +3 more sources
Angewandte Chemie, EarlyView.Cyclopentadienes (CpHs) are fundamental building blocks with widespread applications in chemistry. However, their inherent acidity and isomeric instability have long limited access to chiral variants in an asymmetric fashion. Here, we introduce a CuH‐catalyzed asymmetric transformation that provides an unprecedented entry into a new class of ...
Piero Soppelsa +4 more
wiley +2 more sources
Angewandte Chemie, EarlyView.Heterogeneous iron‐catalyzed environmentally benign and sustainable CH‐oxidative esterification methodology has been developed for the synthesis of esters. This challenging reaction has been achieved by the rational design of specific single atom iron‐based catalyst with Fe‐N4 active centers, which empowered the oxidative esterification of methyl and ...
Zhuang Ma +8 more
wiley +2 more sources
Angewandte Chemie, EarlyView.Enantioselective aminoarylation of ortho‐allyl anilines is achieved under mild conditions. Key to success is the electrostatically‐directed nature of the key aminopalladation step, achieved by using the sulfonated chiral ligand sSPhos on palladium. A detailed study of electronic trends allows tuning of the sulfonamide protecting group to enable good ...
Max Kadarauch +4 more
wiley +2 more sources
Dual Activation of H2 and CO2 by a Pincer‐Type Ni–Zn Heterobimetallic Complex
Angewandte Chemie, EarlyView.A bimetallic Ni−Zn complex performs sequential activations of H2 (1 equiv) and CO2 (2 equiv). This bimetallic cooperativity is attributed to the weak Lewis acidic nature of Zn(II), which promotes fluxional ligand binding. Namely, an X‐type ligand at Ni, where X is hydride or formate, toggles between two different binding modes: bridging Zn(μ‐X)Ni and ...
Krishnendu Dey +3 more
wiley +2 more sources
Metal‐free Hydrogen Generation from Seawater and Silicon Waste: A Circular Approach
Angewandte Chemie, EarlyView.Hydrogen was rapidly generated directly from untreated seawater and polymeric Si waste without any transition metal catalyst. The in situ generated polymeric cross‐linked Si resin was completely depolymerized under mild conditions into chloro‐silane monomers.
Mustapha Hamdaoui +6 more
wiley +2 more sources