scholarly journals Anionic Snieckus−Fries Rearrangement: Solvent Effects and Role of Mixed Aggregates

2008 ◽  
Vol 130 (41) ◽  
pp. 13709-13717 ◽  
Author(s):  
Jason C. Riggs ◽  
Kanwal J. Singh ◽  
Ma Yun ◽  
David B. Collum
Keyword(s):  
Solvent Effects ◽  
Fries Rearrangement ◽  
Mixed Aggregates

Can the Lewis basicity of an isolated solvent molecule be used for characterizing solvent effects?

2020 ◽  
Vol 16 ◽  
Author(s):  
Jean-François Gal ◽  
Pierre-Charles Maria
Keyword(s):  
Solvent Effects ◽  
Molecular Level ◽  
Solvent Molecule ◽  
Lewis Base ◽  
Bulk Liquid ◽  
Donor Number ◽  
Special Focus ◽  
Solution Processes ◽  
Inert Solvent

Background: The ubiquitous Lewis acid/base interactions are important in solution processes. Analytical chemistry may benefit of a better understanding of the role of Lewis basicity, at the molecular level or acting through a bulk solvent effect. Objective: To clearly delineate (i) the basicity at a molecular level, hereafter referred as solute basicity, and (ii) the solvent basicity, which is a bulk-liquid property. Method: The literature that relates Lewis basicity scales and solvent effects is analyzed. A special focus is placed on two extensive scales, the Donor Number, DN, and the BF3 affinity scale, BF3A, which were obtained by calorimetric measurement on molecules as solutes diluted in a quasi-inert solvent, and therefore define a molecular Lewis basicity. We discuss the validity of these solute scales when regarded as solvent scales, in particular when the basicity of strongly associated liquids is discussed. Results: We demonstrate the drawbacks of confusing the Lewis basicity of a solvent molecule, isolated as solute, and that of the bulk liquid solvent itself. Conclusion: Consequently, we recommend a reasoned use of the concept of Lewis basicity taking clearly into account the specificity of the process for which a Lewis basicity effect may be invoked. In particular, the action of the Lewis base, either as an isolated entity, or as a bulk liquid, must be distinguished.

Role of Organolithium Aggregates and Mixed Aggregates in Organolithium Mechanisms

2013 ◽  
Vol 113 (9) ◽  
pp. 7130-7178 ◽  
Author(s):  
Hans J. Reich
Keyword(s):  
Mixed Aggregates

Solvent Effects in Carbohydrate Binding by Synthetic Receptors: Implications for the Role of Water in Natural Carbohydrate Recognition

2008 ◽  
Vol 120 (14) ◽  
pp. 2733-2736 ◽  
Author(s):  
Emmanuel Klein ◽  
Yann Ferrand ◽  
Nicholas P. Barwell ◽  
Anthony P. Davis
Keyword(s):  
Solvent Effects ◽  
Carbohydrate Binding ◽  
Synthetic Receptors ◽  
Carbohydrate Recognition

Solvent effects on the supercritical gas extraction of coal The role of mixed solvents

1982 ◽  
Vol 5 (3-4) ◽  
pp. 241-246 ◽  
Author(s):  
John R. Kershaw
Keyword(s):  
Solvent Effects ◽  
Mixed Solvents ◽  
Gas Extraction

The Combined Role of Catalysis and Solvent Effects on the Biginelli Reaction: Improving Efficiency and Sustainability

2013 ◽  
Vol 19 (16) ◽  
pp. 5174-5182 ◽  
Author(s):  
James H. Clark ◽  
Duncan J. Macquarrie ◽  
James Sherwood
Keyword(s):  
Solvent Effects ◽  
Biginelli Reaction
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