Definition of thionyl in English:

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Pronunciation: /ˈθʌɪənʌɪl/
Pronunciation: /ˈθʌɪənɪl/


[as modifier] Chemistry
Of or denoting the divalent radical SO: thionyl chloride
More example sentences
  • The methyl halide can be produced by reacting methanol with phosphorous halides, hydrogen halides, or, in the case of methyl chloride, thionyl chloride.
  • The resulting ester was saponified under basic conditions to the free acid, converted to the acyl chloride with thionyl chloride, and then to the amide with anhydrous ammonia gas.
  • Schedule 3 comprises a number of toxic or precursor chemicals with widespread industrial uses, such as phosgene, hydrogen cyanide, phosphorus trichloride and thionyl chloride.


1857: so named by H. Schiff (see Schiff base).

For editors and proofreaders

Line breaks: thi|onyl

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