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2 results for “Thiophen”
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Britannica 11th
Encyclopaedia Britannica · 11th edition
Thiophen
Britannica 11thTHIOPHEN, C4H4S, a compound occurring in small quantities in crude coal-tar benzene, from which it was first isolated in 1883 by V. Meyer (Ber., 1883, 16, p. 1465). The method adopted by Meyer to recover the thiophen was as follows. Ten volumes of the purest c ...
Vol. 26, pp. 850-850
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Thiazines
Britannica 11th... ally by heating sulphur with diphenylamine or by the condensation of ortho-aminothiophenol with pyrocatechin. It is a compound of neutral reaction. The first known dyestuff of this series was Lauth's violet, which was prepared by oxidizing paraphenylene diamin ...
Vol. 26, pp. 844-845
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