ISSN:
0021-8383
Keywords:
Chemistry
;
Organic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Studies on U.V./vis Absorption Spectra of Azo Dyes. V. Quantitative Prediction of the Absorption Maxima of Polysubstituted Azobenzenes with an Increment SystemThe effect of substituents on the long-wave band of azobenzenes can be described by using an increment system. Absorption increments which specifically characterize the substituents are derived from the difference in excitation energy between azobenzene and monosubstituted azobenzenes. Analysis of about 350 polysubstituted azobenzenes with absorption maxima between 320 nm and 650 nm showed that the differences between observed and calculated values are generally ±5 nm.Therefore, this increment system permits absorption maxima of azobenzenes to be deduced not as yet prepared or spectroscopically investigated.
Additional Material:
11 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/prac.19813230508
