Studies on Indigoid Dyes: Part IX. Benzylidene-2-Iodothionaphthenes
| Main Authors: | Ajoy Kumar Das, Arun Kumar Sinha |
|---|---|
| Format: | Article Journal |
| Bahasa: | eng |
| Terbitan: |
, 1968
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/6472299 |
Daftar Isi:
- Twelve new iodothioindogenides have been prepared by condensing 6-iodothioindoxyl and 7-icdothi- indoxyl respectively with benzaldehyde, o-, m-, p-nitrobenzaldehydes, p-dimethylamino and p-diethylaminobenzaldehydes and two more dyes by condensing 5-iodothioindoxyl with o-nitrobetzaldehyde and m-nitrobenzaldehyde. Results of previous communication have been collated and it has been shown that with regard to the absorption maxima, substitution of iodine atom at the 5-position of the thioindoxyl is more effective than at the 6- and 7-positions.