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Synthesis and acid-base and thermochromic properties of 5-(2-thiazolyl)-substituted formazans

✍ Scribed by G. N. Lipunova; N. N. Gulemina; L. V. Kourova; N. P. Bednyagina

Book ID
112333001
Publisher
Springer US
Year
1977
Tongue
English
Weight
315 KB
Volume
13
Category
Article
ISSN
0009-3122

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## Abstract By condensation of squaric acid (1) with 2‐(dialkylamino)‐substituted thiazoles 8 a novel type of heterocyclic‐substitued squaraines of the general structure 9 was prepared in moderate yield mostly. The squaraines 9 obtained are sparingly soluble in the most organic solvents and exhibit