Results 41 to 50 of about 2,112 (213)
Metallocene-Appended Imidazoles Displaying Virtual Planar Chirality
, 2016 (S)-1-(1-Alkylethyl)imidazoles 6a/b (alkyl = cyclohexyl, tert-butyl) containing a 2-(η5-cyclopentadienyl)(η4-tetraphenylcyclobutadiene)cobalt substituent are readily synthesized.
Geraint Jones (2182774) +1 more
core +1 more source
Interplay of reversible chain transfer and comonomer incorporation reactions in coordination copolymerization of ethylene/1–hexene [PDF]
Polyolefins Journal, 2019 Coordinative chain transfer polymerization (CCTP) has opened a new path for the development of novel products like olefin block copolymers and chain-end functional polyolefins.
Ali Ebrahimi +4 more
doaj +1 more source
Molecules, 2023 Despite large-scale investigations of homogeneous single-site metallocene catalysts and systems based on them, there are still unsolved problems related to the control of their activity and chemo- and stereoselectivity.
Lyudmila V. Parfenova +6 more
doaj +1 more source
Angewandte Chemie International Edition, 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 +1 more source
Reactivity and immobiliztion of group IV single-center olefin polyerization catalysts [PDF]
, 2010 A large fraction of the commercially manufactured crystalline polyolefins are produced in large-scale slurry and gas-phase processes, which require the polymerization catalyst to be anchored on a solid support to obtain a satisfactory product morphology.
Novarino, Elena,, Novarino, Elena
core
State‐of‐the‐Art and Synthetic Challenges for Hydrosilane Production
Chemistry – A European Journal, EarlyView.The synthesis of hydrosilanes is currently energy intensive and their recycling is not considered. However, these compounds are important in many industrial fields but also for the valorization of oxygenated waste, towards a circular economy. This review compares the available synthetic routes and highlights the remaining challenges for the production ...
Gabriel Durin +3 more
wiley +1 more source
Chemistry – A European Journal, EarlyView.Homo‐ and heterodinuclear group 4 metallocene complexes of the type [(Cp2M)2(μ‐Me)(μ‐C2R)] (M = Ti, Zr) are active catalysts for the polymerization of ethylene in the presence of aluminium‐free activators. The catalytically active species are proposed to have dinuclear character and depending on the type of activator, unique reactivity was observed ...
Hanan Al Hamwi +8 more
wiley +1 more source
Polyolefin Chain Shuttling at ansa-Metallocene Catalysts: Legend and Reality
, 2021 Olefin coordinative chain-transfer polymerization (CCTP) under concurrent tandem catalysis conditions is a smart and valuable synthetic approach to statistical olefin block copolymers (OBC).
Roberta Cipullo +4 more
core
Hydrogen effects in the polymerization of propylene with C2 symmetric metallocene catalysts
e-Polymers, 2013 Propylene was polymerized with two C2 symmetric metallocene catalysts, ethylene bis(indenyl)zirconium dichloride and dimethylsilyl bis(2-methylbenz( e) indenyl) zirconium dichloride, in the presence of increasing amounts of hydrogen.
Amer Ismael, Reenen Albert van
doaj +1 more source
Hydrosilane Chemistry: From Historic First Steps to Modern Applications
European Journal of Inorganic Chemistry, EarlyView.This review covers the history of hydrosilanes, from their initial discovery to their modern applications. It highlights the pioneering work of chemists like Alfred Stock and Franz Fehér and discusses the modern ways of synthesis and use of hydrosilanes in printed electronics.
Uwe Böhme, Maik Gerwig
wiley +1 more source