mercaptaln.

Brit.

/məːˈkapt(ə)l/,

/məːˈkaptal/, U.S.

/mərˈkæpˌtɑl/,

/mərˈkæpt(ə)l/

Origin: Formed within English, by derivation. Etymons: mercaptan n., -al suffix².

Etymology: < mercapt- (in mercaptan n.) + -al suffix². N.E.D. (1906) gives only the pronunciation (mə̄ɹkæ·ptăl) /məːˈkæptəl/.

Chemistry.

Any of a series of compounds with the general formula RCH(SR′)₂, formed by the acid-catalysed reaction of a thiol (mercaptan) with an aldehyde. Also called thioacetal.

ΚΠ

1892 M. M. P. Muir & H. F. Morley Watts' Dict. Chem. Mercaptals... They may be viewed as thio-acetals or as the sulphur-compounds corresponding to the alkyl derivatives of ortho-aldehydes.

1914 Chem. Abstr. 8 2716 (heading) Resolution of racemic saccharides by means of optically active amyl mercaptan, and some mercaptals.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) I. 229/2 Mercaptans react in a similar way [to alcohols] to form mercaptals.

1991 Tetrahedron 47 7839 The versatility of tartraldehyde mercaptals can be exploited in other ways.

This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022).

单词	mercaptal
释义	mercaptaln. Brit. /məːˈkapt(ə)l/, /məːˈkaptal/, U.S. /mərˈkæpˌtɑl/, /mərˈkæpt(ə)l/ Origin: Formed within English, by derivation. Etymons: mercaptan n., -al suffix². Etymology: < mercapt- (in mercaptan n.) + -al suffix². N.E.D. (1906) gives only the pronunciation (mə̄ɹkæ·ptăl) /məːˈkæptəl/. Chemistry. Any of a series of compounds with the general formula RCH(SR′)₂, formed by the acid-catalysed reaction of a thiol (mercaptan) with an aldehyde. Also called thioacetal. ΚΠ 1892 M. M. P. Muir & H. F. Morley Watts' Dict. Chem. Mercaptals... They may be viewed as thio-acetals or as the sulphur-compounds corresponding to the alkyl derivatives of ortho-aldehydes. 1914 Chem. Abstr. 8 2716 (heading) Resolution of racemic saccharides by means of optically active amyl mercaptan, and some mercaptals. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) I. 229/2 Mercaptans react in a similar way [to alcohols] to form mercaptals. 1991 Tetrahedron 47 7839 The versatility of tartraldehyde mercaptals can be exploited in other ways. This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022). < n.1892
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