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Solvent polarity scales: determination of new ET(30) values for 84 organic solvents |
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| Authors: | José P Cerón‐Carrasco Denis Jacquemin Christian Laurence Aurélien Planchat Christian Reichardt Khadija Sraïdi |
| Institution: | 1. Laboratoire CEISAM, UMR CNRS 6230, BP 92208, Université de Nantes, , 44322, Cedex 3 Nantes, France;2. Institut Universitaire de France (IUF), , 75005, Cedex 05 Paris, France;3. Fachbereich Chemie, Philipps‐Universit?t, , 35032 Marburg, Germany;4. Laboratoire de Chimie Bioorganique, Faculté des Sciences, Université Choua?b Doukkali, , El Jadida, Maroc |
| Abstract: | The solvent polarity parameter ET(30) is newly measured from the solvatochromism of the betaine dye 30 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 ET(30) values is limited to non‐hydrogen‐bond donor solvents. Relationships with the chain length n are given for the determination of tertiary ET(30) values of the homologous H(CH2)nY solvent series. The parameter ET(30) is orthogonal to the function of the refractive index (n2 ? 1) / (2n2 + 1). For non hydrogen‐bond donor solvents, this allows to enter ET(30) as an almost pure electrostatic parameter in a new linear solvation energy relationship. Copyright © 2014 John Wiley & Sons, Ltd. |
| Keywords: | betaine dyes linear free energy relationships solvatochromism solvent effects |