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Extending the Solvent Acidiy Scale to Highly Acidic Organic Solvents: The Unique Photophysical Behaviour of 3,6‐Diethyltetrazine
Author(s) -
Catalán Javier,
Díaz Cristina
Publication year - 1999
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/(sici)1099-0690(199904)1999:4<885::aid-ejoc885>3.0.co;2-w
Subject(s) - solvatochromism , chemistry , solvent , organic chemistry , acceptor , scale (ratio) , solvent effects , combinatorial chemistry , computational chemistry , physics , quantum mechanics , condensed matter physics
The SA scale, developed previously for weakly acidic solvents, was extended to include the most acidic solvents (haloalcohols and carboxylic acids) by using a unique solvatochromic probe (3,6‐diethyl‐1,2,4,5‐tetrazine). The proposed new solvent scale has a number of advantages over widely used alternatives such as that based on Gutmann's acceptor number (AN). As shown in this paper, SA data provide an accurate description of the effect of solvent acidity on various chemical properties.