thion-comb. form

Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is usually maintained on the first syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. thionoxanilic Brit.

/ˌθʌɪənɒksəˈnɪlɪk/, U.S.

/ˌθaɪənˌɑksəˈnɪlɪk/.

Etymology: < Greek θεῖον sulphur: compare thio- comb. form.

Chemistry.

A name for sulphur taking the place of oxygen in a compound and joined by two bonds to carbon. e.g. in methyl thioncarbamate, H₂N.CS.OCH₃, as distinct from methyl carbamate and methyl-thiolcarbamate: see thiol- comb. form. (Certain words beginning with thion- do not conform to this system: see thionic adj. at thio- comb. form 1, etc.)

ΚΠ

1899 Jrnl. Chem. Soc. 76 i. 797 The authors adopt the Geneva nomenclature, thion being used to denote compounds containing the group .CS.OR, and thiol those containing the group .CO.SR.

1904 Jrnl. Chem. Soc. 86 i. 990 The crude ester..is best converted directly into thionoxanilic acid, NHPh.CS.CO₂H.

This entry has not yet been fully updated (first published 1912; most recently modified version published online March 2022).

单词	thion-
释义	thion-comb. form Stress is usually determined by a subsequent element and vowels may be reduced accordingly. Some degree of stress is usually maintained on the first syllable. If the subsequent element is an existing word, it is likely to retain its original stress pattern, e.g. thionoxanilic Brit. /ˌθʌɪənɒksəˈnɪlɪk/, U.S. /ˌθaɪənˌɑksəˈnɪlɪk/. Etymology: < Greek θεῖον sulphur: compare thio- comb. form. Chemistry. A name for sulphur taking the place of oxygen in a compound and joined by two bonds to carbon. e.g. in methyl thioncarbamate, H₂N.CS.OCH₃, as distinct from methyl carbamate and methyl-thiolcarbamate: see thiol- comb. form. (Certain words beginning with thion- do not conform to this system: see thionic adj. at thio- comb. form 1, etc.) ΚΠ 1899 Jrnl. Chem. Soc. 76 i. 797 The authors adopt the Geneva nomenclature, thion being used to denote compounds containing the group .CS.OR, and thiol those containing the group .CO.SR. 1904 Jrnl. Chem. Soc. 86 i. 990 The crude ester..is best converted directly into thionoxanilic acid, NHPh.CS.CO₂H. This entry has not yet been fully updated (first published 1912; most recently modified version published online March 2022). < comb. form1899
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