The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Multifunctional activities of benzazole derivatives in rubber vulcanization》. Authors are Khanra, Tapan Kumar; Adhikari, Basudam; Maiti, Sukumar.The article about the compound:2-Mercapto-5-methylbenzimidazolecas:27231-36-3,SMILESS:SC1=NC2=CC(C)=CC=C2N1).Related Products of 27231-36-3. Through the article, more information about this compound (cas:27231-36-3) is conveyed.
Benzazole thiols (e.g. 2-mercaptobenzothiazole and 2-mercaptobenzimidazole) and sulfenamides (e.g. 2-morpholinothiobenzothiazole) are used as rubber chems. The nature and the extent of their performance in rubber depend on the nature of the key heteroatom present in the azole ring. A comparative evaluation of accelerator-antioxidant properties of benzazole thiols and sulfenamides is presented.
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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem