Solvent polarity scales: determination of new ET(30) values for 84 organic solvents. (19th February 2014)

• Record Type: Journal Article
• Authors: Cerón‐Carrasco, José P.; Jacquemin, Denis; Laurence, Christian; Planchat, Aurélien; Reichardt, Christian; Sraïdi, Khadija
• Is Part Of: Journal of physical organic chemistry. Volume 27:Number 6(2014:Jun.)
• Page Start: 512
• Page End: 518
• Publication Date: 2014-02-19
• Subjects: Chemistry, Physical organic -- Periodicals; 547.1
• DOI: 10.1002/poc.3293
• Languages: English
• ISSNs: 0894-3230

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>The solvent polarity parameter <italic>E</italic>_T(30) is newly measured from the solvatochromism of the betaine dye <bold>30</bold> for 84 solvents and re‐measured for 186 additional ones. The results are organized in a database. It is shown that the validity of linear solvation energy relationships used for the determination of secondary <italic>E</italic>_T(30) values is limited to non‐hydrogen‐bond donor solvents. Relationships with the chain length <italic>n</italic> are given for the determination of tertiary <italic>E</italic>_T(30) values of the homologous H(CH₂)<italic>_n</italic>Y solvent series. The parameter <italic>E</italic>_T(30) is orthogonal to the function of the <named-content content-type="chemicalTechnology" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink">refractive index</named-content> (<italic>n</italic>² − 1) / (2<italic>n</italic>² + 1). For non hydrogen‐bond donor solvents, this allows to enter <italic>E</italic>_T(30) as an almost pure electrostatic parameter in a new linear solvation energy relationship. Copyright © 2014 John Wiley &amp; Sons, Ltd.</p> </abstract>