Azo, hydrazone and other tautomers of the azo dye 7-amino-4-hydroxy-3-[(4-methoxy-2-sulfophenyl)azo]-2-naphthalenesulfonic acid: a PM3 study
✍ Scribed by S Tauro; E Coutinho
- Book ID
- 114141085
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 101 KB
- Volume
- 532
- Category
- Article
- ISSN
- 0166-1280
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## Abstract A number of 2‐ and 3‐methoxy‐substituted‐4‐N.N‐diethylaminoazobenzenes have been prepared and their absorption maxima in ethanol and toluene compared with the corresponding 4‐N.N‐diethylaminoazobenzenes. Both the 2‐ and 3‐methoxy groups cause a bathochromic shift, but the bathochromic s
## Abstract Azo coupling of 6‐amino‐4‐hydroxy‐2‐naphthalenesulfonic acid **(1)** with 3‐trifluoromethyl‐ and 4‐nitrobenzenediazonium ion in relative highly concentrated aqueous alkaline solutions gave ratios of aminoazo to hydroxyazo compounds which are much higher than expected on the basis of the