Acrylate Esters by Ethenolysis of Maleate Esters with Ru Metathesis Catalysts: an HTE and a Technoeconomic Study

2020 ◽  
Vol 103 (4) ◽  
Author(s):  
Pascal S. Engl ◽  
Alexey Tsygankov ◽  
Jordan De Jesus Silva ◽  
Jean‐Paul Lange ◽  
Christophe Copéret ◽  
...  
Keyword(s):  
Metathesis Catalysts ◽  
Acrylate Esters

Activated Hoveyda‐Grubbs Olefin Metathesis Catalysts Derived from a Large Scale Produced Pharmaceutical Intermediate—Sildenafil Aldehyde

2021 ◽  
Author(s):  
Louis Monsigny ◽  
Jakub Piątkowski ◽  
Damian Trzybiński ◽  
Krzysztof Wozniak ◽  
Tomasz Nienałtowski ◽  
...  
Keyword(s):  
Olefin Metathesis ◽  
Large Scale ◽  
Metathesis Catalysts

scholarly journals Soil microbiomes mediate degradation of vinyl ester-based polymer composites

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Adam M. Breister ◽  
Muhammad A. Imam ◽  
Zhichao Zhou ◽  
Md Ariful Ahsan ◽  
Juan C. Noveron ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Polymer Composite ◽  
Structural Integrity ◽  
Abiotic Factors ◽  
High Strength ◽  
Strength Properties ◽  
Naturally Occurring ◽  
Structural Applications ◽  
Acrylate Esters ◽  
Bacterial Groups

AbstractPolymer composites are attractive for structural applications in the built environment due to their lightweight and high strength properties but suffer from degradation due to environmental factors. While abiotic factors like temperature, moisture, and ultraviolet light are well studied, little is known about the impacts of naturally occurring microbial communities on their structural integrity. Here we apply complementary time-series multi-omics of biofilms growing on polymer composites and materials characterization to elucidate the processes driving their degradation. We measured a reduction in mechanical properties due to biologically driven molecular chain breakage of esters and reconstructed 121 microbial genomes to describe microbial diversity and pathways associated with polymer composite degradation. The polymer composite microbiome is dominated by four bacterial groups including the Candidate Phyla Radiation that possess pathways for breakdown of acrylate, esters, and bisphenol, abundant in composites. We provide a foundation for understanding interactions of next-generation structural materials with their natural environment that can predict their durability and drive future designs.

scholarly journals A General Decomposition Pathway for Phosphine-Stabilized Metathesis Catalysts: Lewis Donors Accelerate Methylidene Abstraction

2016 ◽  
Vol 138 (44) ◽  
pp. 14668-14677 ◽  
Author(s):  
William L. McClennan ◽  
Stephanie A. Rufh ◽  
Justin A. M. Lummiss ◽  
Deryn E. Fogg
Keyword(s):  
Metathesis Catalysts ◽  
Decomposition Pathway

Nitrenium ions and trivalent boron ligands as analogues of N-heterocyclic carbenes in olefin metathesis: a computational study

2015 ◽  
Vol 44 (46) ◽  
pp. 20021-20026 ◽  
Author(s):  
A. Pazio ◽  
K. Woźniak ◽  
K. Grela ◽  
B. Trzaskowski
Keyword(s):  
Olefin Metathesis ◽  
Computational Study ◽  
Heterocyclic Carbenes ◽  
Mechanistic Study ◽  
Nitrenium Ions ◽  
Nitrenium Ion ◽  
Metathesis Catalysts

A DFT mechanistic study reveals that nitrenium ion-modified Hoveyda-like complexes are good candidates for latent metathesis catalysts, while boron-modified systems are candidates for very fast metathesis catalysts.

Adamantyl-SubstitutedN-Heterocyclic Carbene Ligands in Second-Generation Grubbs-Type Metathesis Catalysts

2003 ◽  
Vol 22 (25) ◽  
pp. 5291-5296 ◽  
Author(s):  
Maarten B. Dinger ◽  
Piotr Nieczypor ◽  
Johannes C. Mol
Keyword(s):  
Second Generation ◽  
Carbene Ligands ◽  
Metathesis Catalysts

scholarly journals Impact of Ligands and Metals on the Formation of Metallacyclic Intermediates and a Nontraditional Mechanism for Group VI Alkyne Metathesis Catalysts

2021 ◽  
Author(s):  
Richard R. Thompson ◽  
Madeline E. Rotella ◽  
Xin Zhou ◽  
Frank R. Fronczek ◽  
Osvaldo Gutierrez ◽  
...  
Keyword(s):  
Alkyne Metathesis ◽  
Group Vi ◽  
Metathesis Catalysts
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