scholarly journals A simple synthesis of [RuCl2(NHC)(p-cymene)] complexes and their use in olefin oxidation catalysis

2021 ◽  
Author(s):  
Steven P Nolan ◽  
Xinyuan Ma ◽  
Sébastien Guillet ◽  
Min Peng ◽  
Kristof Van Hecke
Keyword(s):  
Oxidation Catalysis ◽  
Simple Synthesis ◽  
Synthetic Route ◽  
Weak Base ◽  
Aerobic Conditions ◽  
Olefin Oxidation

A simple and efficient synthetic route to [RuCl2(NHC)(p-cymene)] and [Ru(CO3)(NHC)(p-cymene)] complexes making use of a weak base, under aerobic conditions, is reported. This method enables access to a series of...

Simple synthesis of novel terthiophene-based D–A1–D–A2 polymers for polymer solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86276-86284 ◽  
Author(s):  
Mengxia Lu ◽  
Wen Wang ◽  
Wei Lv ◽  
Shuhui Yan ◽  
Tao Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Polymer Solar Cells ◽  
Simple Synthesis ◽  
Synthetic Route

Our study presents a simple synthetic route to a series of novel terthiophene-based D–A1–D–A2 polymers for efficient PSCs.

scholarly journals Substrate-Solvent Crosstalk – Effects on Reaction Kinetics and Product Selectivity in Olefin Oxidation Catalysis

2021 ◽  
Author(s):  
Rita N. Sales ◽  
Sam K. Callear ◽  
Pedro D. Vaz ◽  
Carla D. Nunes
Keyword(s):  
Ring Opening ◽  
Reaction Rate ◽  
Styrene Oxide ◽  
Oxidation Catalysis ◽  
Product Selectivity ◽  
Oxidation Reactions ◽  
Olefin Oxidation ◽  
Reaction Systems ◽  
Ring Opening Reaction ◽  
Oxide Conversion

In this work we explored how solvents can affect olefin oxidation reactions catalyzed by MCM-bpy-Mo catalysts and whether their control can be made with those players. The results of this study evidenced that polar and apolar aprotic solvents modulated the reactions in different ways. Experimental data showed that acetonitrile (aprotic polar) could hinder largely the reaction rate whereas toluene (aprotic apolar) did not. In both cases product selectivity at isoconversion was not affected. Further insights were obtained by means of neutron diffraction experiments, which confirmed the kinetic data allowing to propose a model based on substrate-solvent crosstalk by means of hydrogen bonding. In addition, the model was also validated in the ring-opening reaction (overoxidation) of styrene oxide towards benzaldehyde, which progressed when toluene was the solvent (reaching 31% styrene oxide conversion) but was strongly hindered when acetonitrile was used instead (reaching only 7% conversion), due to the establishment of H-bonds in the latter. Although this model was confirmed and validated for olefin oxidation reactions, it can be envisaged that it may also be applied to other catalytic reaction systems where reaction control is critical, while widening its use.

scholarly journals Substrate–Solvent Crosstalk—Effects on Reaction Kinetics and Product Selectivity in Olefin Oxidation Catalysis

Chemistry ◽  
2021 ◽  
Vol 3 (3) ◽  
pp. 753-764
Author(s):  
Rita N. Sales ◽  
Samantha K. Callear ◽  
Pedro D. Vaz ◽  
Carla D. Nunes
Keyword(s):  
Ring Opening ◽  
Reaction Rate ◽  
Styrene Oxide ◽  
Oxidation Catalysis ◽  
Product Selectivity ◽  
Oxidation Reactions ◽  
Olefin Oxidation ◽  
Reaction Systems ◽  
Ring Opening Reaction ◽  
Oxide Conversion

In this work, we explored how solvents can affect olefin oxidation reactions catalyzed by MCM-bpy-Mo catalysts and whether their control can be made with those players. The results of this study demonstrated that polar and apolar aprotic solvents modulated the reactions in different ways. Experimental data showed that acetonitrile (aprotic polar) could largely hinder the reaction rate, whereas toluene (aprotic apolar) did not. In both cases, product selectivity at isoconversion was not affected. Further insights were obtained by means of neutron diffraction experiments, which confirmed the kinetic data and allowed for the proposal of a model based on substrate–solvent crosstalk by means of hydrogen bonding. In addition, the model was also validated in the ring-opening reaction (overoxidation) of styrene oxide to benzaldehyde, which progressed when toluene was the solvent (reaching 31% styrene oxide conversion) but was strongly hindered when acetonitrile was used instead (reaching only 7% conversion) due to the establishment of H-bonds in the latter. Although this model was confirmed and validated for olefin oxidation reactions, it can be envisaged that it may also be applied to other catalytic reaction systems where reaction control is critical, thereby widening its use.

scholarly journals The “weak base route” leading to transition metal–N-heterocyclic carbene complexes

2021 ◽  
Vol 57 (32) ◽  
pp. 3836-3856
Author(s):  
Ekaterina A. Martynova ◽  
Nikolaos V. Tzouras ◽  
Gianmarco Pisanò ◽  
Catherine S. J. Cazin ◽  
Steven P. Nolan
Keyword(s):  
Transition Metal ◽  
Organometallic Chemistry ◽  
Heterocyclic Carbenes ◽  
Synthetic Route ◽  
Weak Base ◽  
Carbene Complexes

N-Heterocyclic carbenes (NHCs) are nowadays ubiquitous in organometallic chemistry and catalysis. A simple synthetic route to these is presented.

A Synthetic Route to Alkyl−PtIIIDinuclear Complexes from Olefins and Its Implication on the Olefin Oxidation Catalyzed by Amidate-Bridged PtIIIDinuclear Complexes

1998 ◽  
Vol 120 (12) ◽  
pp. 2900-2907 ◽  
Author(s):  
Kazuko Matsumoto ◽  
Yuji Nagai ◽  
Jun Matsunami ◽  
Kazuhiro Mizuno ◽  
Takeya Abe ◽  
...  
Keyword(s):  
Synthetic Route ◽  
Olefin Oxidation
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