Chemistry is traditionally divided into organic and inorganic chemistry. COA of Formula: C9H8S, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 16587-47-6
HIGH-TEMPERATURE ORGANIC SYNTHESIS. XLII. REACTION OF HALOGENOARENES AND 2-CHLOROTHIOPHENE WITH HYDROGEN SULFIDE IN THE PRESENCE OF ACETYLENE
Benzothiophenes are formed with yields of more than 77percent in a single preparative stage during the gas-phase reaction of halogenoarenes with hydrogen sulfide and acetylene (600-700 deg C).It is suggested that arylthiyl radicals (ArS-radical), which are effectively captured by the acetylene, participate in the process.The effect of the structure of the halogenoarene on the selectivity of the process is discussed.The gas-phase reaction of 2-chlorothiophene with hydrogen sulfide in the presence of acetylene leads to the formation of thieno<2,3-b>thiophene.
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Reference：
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem