Infrared and the near-ultraviolet absorption spectra of guanidine and benzothiazole derivatives was written by Suresh, K. S.;Ramachandran, J.;Rao, C. N. R.. And the article was included in Journal of Scientific & Industrial Research in 1961.Computed Properties of C13H10N2S This article mentions the following:
Infrared and ultraviolet absorption spectra of guanidine and benzothiazole derivatives showed characteristic bands. Mono-, di-, and triphenyl guanidines had bands at 1692, 1647, and 1659 cm.-1, possibly due to variations of band order with conjugation, while in the ultraviolet region they showed progressively increasing bathochromic shifts. The ultraviolet spectrum of 2-mercaptobenzothiazole (I) in acid and basic media showed a variation in the absorption maximum, possibly due to the 2,3-dihydrobenzathiazole-2-thione structure assumed by I. In the experiment, the researchers used many compounds, for example, N-Phenylbenzo[d]thiazol-2-amine (cas: 1843-21-6Computed Properties of C13H10N2S).
N-Phenylbenzo[d]thiazol-2-amine (cas: 1843-21-6) belongs to thiazole derivatives. The higher aromaticity of thiazole is due to delocalization of a lone pair of sulfur electrons across the ring, which is evidenced by chemical shifts of ring hydrogen at δ 7.27 and 8.77 ppm (C2 and C4), indicating diamagnetic ring current. There are numerous natural products that possess a thiazole ring with broad pharmacological activities. Thiamine, also known as vitamin B1, possesses a thiazole ring linked with 2-methylpyrimidine-4-amine as hydrochloride salt.Computed Properties of C13H10N2S
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica