"Thionyl" Natural Recordings by Native Speakers
Thionyl refers to a compound containing the chemical group S(O)2, which is composed of a sulfur atom double bonded to an oxygen atom and also bonded to another oxygen atom.
Thionaphthene is a polycyclic aromatic hydrocarbon (PAH) that consists of a fused ring of five benzene rings. It is a colorless liquid with a characteristic odor similar to that of naphthalene. Thionaphthene, also known as thionaphthene, 2,3-dihaphtho[2,1-b]thiophene, is formed by the Sulfur courier reaction, with sulfurization of naphthalene.