paraconicadj.

Brit.

/ˌparəˈkɒnɪk/, U.S.

/ˌpɛrəˈkɑnɪk/

Origin: A borrowing from German, combined with an English element. Etymons: German Paraconsäure , -ic suffix.

Etymology: < paracon- (in German Paraconsäure (T. Swarts 1867, in Zeitschr. f. Chem. 3 648; < para- para- prefix¹ + -aconsäure (in e.g. Mesaconsäure : see mesaconic adj.)) + -ic suffix. Compare aconic adj., citraconic adj., itaconic adj., mesaconic adj.

Chemistry.

paraconic acid n. a crystalline acid which is a lactone with a carboxylic acid side group, C₄H₅O₂(COOH); (also) any substituted derivative of this.

ΚΠ

1873 I. Remsen tr. R. Fittig Wöhler's Outl. Organ. Chem. 168 Paraconic acid..is formed together with itamalic acid, by the decomposition of itamonochlorpyrotartaric acid with water.

1923 Jrnl. Amer. Chem. Soc. 45 3065 If the hydroxyl group were on the primary carbon atom, trimethyl paraconic acid, a known compound would result.

1967 I. L. Finar Org. Chem. (ed. 5) I. xvi. 407 If only one methylene group in succinic acid reacts with the aldehyde, a paraconic acid is obtained... When these paraconic acids are heated, β, γ-unsaturated acids are obtained.

2002 Industr. & Engin. Chem. Res. 41 2071/1 An additional byproduct, tentatively identified at [sic] paraconic acid, was formed in small quantities at 463 K.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	paraconic
释义	paraconicadj. Brit. /ˌparəˈkɒnɪk/, U.S. /ˌpɛrəˈkɑnɪk/ Origin: A borrowing from German, combined with an English element. Etymons: German Paraconsäure , -ic suffix. Etymology: < paracon- (in German Paraconsäure (T. Swarts 1867, in Zeitschr. f. Chem. 3 648; < para- para- prefix¹ + -aconsäure (in e.g. Mesaconsäure : see mesaconic adj.)) + -ic suffix. Compare aconic adj., citraconic adj., itaconic adj., mesaconic adj. Chemistry. paraconic acid n. a crystalline acid which is a lactone with a carboxylic acid side group, C₄H₅O₂(COOH); (also) any substituted derivative of this. ΚΠ 1873 I. Remsen tr. R. Fittig Wöhler's Outl. Organ. Chem. 168 Paraconic acid..is formed together with itamalic acid, by the decomposition of itamonochlorpyrotartaric acid with water. 1923 Jrnl. Amer. Chem. Soc. 45 3065 If the hydroxyl group were on the primary carbon atom, trimethyl paraconic acid, a known compound would result. 1967 I. L. Finar Org. Chem. (ed. 5) I. xvi. 407 If only one methylene group in succinic acid reacts with the aldehyde, a paraconic acid is obtained... When these paraconic acids are heated, β, γ-unsaturated acids are obtained. 2002 Industr. & Engin. Chem. Res. 41 2071/1 An additional byproduct, tentatively identified at [sic] paraconic acid, was formed in small quantities at 463 K. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < adj.1873
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