epimern.

/ˈɛpɪmə/

Etymology: < German epimer, plural epimere (E. Votoček 1911, in Berichte der Deutsch. Chem. Ges. 44 360), < epi- prefix + -mer comb. form².

Chemistry.

Either of two isomers differing in the configuration of the atoms about a single asymmetric carbon atom in a compound containing other asymmetric carbon atoms; originally in a more restricted sense (see quot. 1948¹).

ΚΠ

1948 W. Pigman Chem. Carbohydrates ii. 26 In the sugar series, substances which differ only in the configuration of the carbon atom immediately adjacent to that carrying the carbonyl or carboxyl group are known as epimers.

1948 W. Pigman Chem. Carbohydrates ii. 26 It may be well to extend the definition of epimers to mean any pair of stereoisomers that differ solely in the configuration of a single asymmetric carbon atom.

1962 E. L. Eliel Stereochem. Carbon Compounds iv. 40 Diastereoisomers that differ in configuration at only one asymmetric center are sometimes called ‘epimers’; thus menthone and isomenthone are epimers.

Derivatives

epiˈmeric adj. of, having the qualities of, or standing in relation to another compound as, an epimer.

ΚΠ

1911 Chem. Abstr. 5 1607 Epimeric aldoses give the same osazone.

1965 K. Mislow Introd. Stereochem. ii. 91 The diastereomeric ephedrines and pentaric acids are necessarily epimeric.

eˈpimerism n. [ < German epimerie (E. Votoček 1911, loc. cit .): see -ism suffix] the fact or condition of having epimers.

ΚΠ

1911 Chem. Abstr. 5 1606 It is proposed that sugars which are related in the same manner as is glucose..to mannose..should be distinguished by prefixing epi- to the name of 1 member of the pair. The relationship itself should be termed epimerism; the 2 related compds. would then be called epimers.

This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2019).

单词	epimer
释义	epimern. /ˈɛpɪmə/ Etymology: < German epimer, plural epimere (E. Votoček 1911, in Berichte der Deutsch. Chem. Ges. 44 360), < epi- prefix + -mer comb. form². Chemistry. Either of two isomers differing in the configuration of the atoms about a single asymmetric carbon atom in a compound containing other asymmetric carbon atoms; originally in a more restricted sense (see quot. 1948¹). ΚΠ 1948 W. Pigman Chem. Carbohydrates ii. 26 In the sugar series, substances which differ only in the configuration of the carbon atom immediately adjacent to that carrying the carbonyl or carboxyl group are known as epimers. 1948 W. Pigman Chem. Carbohydrates ii. 26 It may be well to extend the definition of epimers to mean any pair of stereoisomers that differ solely in the configuration of a single asymmetric carbon atom. 1962 E. L. Eliel Stereochem. Carbon Compounds iv. 40 Diastereoisomers that differ in configuration at only one asymmetric center are sometimes called ‘epimers’; thus menthone and isomenthone are epimers. Derivatives epiˈmeric adj. of, having the qualities of, or standing in relation to another compound as, an epimer. ΚΠ 1911 Chem. Abstr. 5 1607 Epimeric aldoses give the same osazone. 1965 K. Mislow Introd. Stereochem. ii. 91 The diastereomeric ephedrines and pentaric acids are necessarily epimeric. eˈpimerism n. [ < German epimerie (E. Votoček 1911, loc. cit .): see -ism suffix] the fact or condition of having epimers. ΚΠ 1911 Chem. Abstr. 5 1606 It is proposed that sugars which are related in the same manner as is glucose..to mannose..should be distinguished by prefixing epi- to the name of 1 member of the pair. The relationship itself should be termed epimerism; the 2 related compds. would then be called epimers. This entry has not yet been fully updated (first published 1972; most recently modified version published online March 2019). < n.1911
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