pyrrolinen.

Brit.

/ˈpɪrəliːn/,

/ˈpɪrəlɪn/, U.S.

/ˈpɪrəlɪn/

Forms: 1800s– pyrrolin, 1800s– pyrroline.

Origin: Formed within English, by derivation. Etymons: pyrrole n., -ine suffix⁵.

Etymology: < pyrrole n. + -ine suffix⁵. In sense 2 after German Pyrrolin (G. Ciamician & M. Dennstedt 1883, in Berichte der Deutsch. Chem. Ges. 16 1539).

Chemistry.

†1. = pyrrole n. Obsolete. rare.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > containing nitrogen > pyrrole

pyrrole1835

pyrroline1881

1881 H. Watts Dict. Chem. VIII. ii. 1728 Pyrroline (commonly called Pyrrol), C₄H₅N = NH:CH·CH:CH·CH.

2. Each of three isomeric cyclic amines which are partially reduced derivatives of pyrrole having the formula C₄H₇N; a substituted derivative of any of these compounds.The most important isomer (more fully 3-pyrroline) is CH₂·CHCH·CH₂·NH, a colourless, basic liquid obtained by reduction of pyrrole with nascent hydrogen.

ΘΚΠ

the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > containing nitrogen > pyrrole > derivatives

pyrroline1884

1884 H. E. Roscoe & C. Schorlemmer Treat. Chem. III. ii. 610 Pyrrol unites with nascent hydrogen, forming pyrrolin, C₄H₆(NH), an oily liquid that boils at 90°–91°, and acts as a strong base.

1902 Jrnl. Chem. Soc. 82 i. 54 Better yields of pyrroline are obtained by reducing pyrroles with zinc and hydrochloric acid than by using zinc and acetic acid.

1926 H. G. Rule tr. J. Schmidt Text-bk. Org. Chem. 517 Dihydro-pyrroles are known as pyrrolines, and the completely reduced tetrahydro-pyrroles as pyrrolidines.

1961 G. M. Badger Chem. Heterocyclic Compounds ii. 17 3-Pyrrolines have been isomerized to the corresponding 1-pyrrolines by heating with Raney nickel.

2005 Dyes & Pigments 65 206/2 The azomethine ylide..has been used to prepare five membered heterocycles containing one nitrogen atom, i.e. pyrroles, pyrrolines, and pyrrolidines.

This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).

单词	pyrroline
释义	pyrrolinen. Brit. /ˈpɪrəliːn/, /ˈpɪrəlɪn/, U.S. /ˈpɪrəlɪn/ Forms: 1800s– pyrrolin, 1800s– pyrroline. Origin: Formed within English, by derivation. Etymons: pyrrole n., -ine suffix⁵. Etymology: < pyrrole n. + -ine suffix⁵. In sense 2 after German Pyrrolin (G. Ciamician & M. Dennstedt 1883, in Berichte der Deutsch. Chem. Ges. 16 1539). Chemistry. †1. = pyrrole n. Obsolete. rare. ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > containing nitrogen > pyrrole pyrrole1835 pyrroline1881 1881 H. Watts Dict. Chem. VIII. ii. 1728 Pyrroline (commonly called Pyrrol), C₄H₅N = NH:CH·CH:CH·CH. 2. Each of three isomeric cyclic amines which are partially reduced derivatives of pyrrole having the formula C₄H₇N; a substituted derivative of any of these compounds.The most important isomer (more fully 3-pyrroline) is CH₂·CHCH·CH₂·NH, a colourless, basic liquid obtained by reduction of pyrrole with nascent hydrogen. ΘΚΠ the world > matter > chemistry > organic chemistry > organic compounds > [noun] > heterocyclic compounds > containing nitrogen > pyrrole > derivatives pyrroline1884 1884 H. E. Roscoe & C. Schorlemmer Treat. Chem. III. ii. 610 Pyrrol unites with nascent hydrogen, forming pyrrolin, C₄H₆(NH), an oily liquid that boils at 90°–91°, and acts as a strong base. 1902 Jrnl. Chem. Soc. 82 i. 54 Better yields of pyrroline are obtained by reducing pyrroles with zinc and hydrochloric acid than by using zinc and acetic acid. 1926 H. G. Rule tr. J. Schmidt Text-bk. Org. Chem. 517 Dihydro-pyrroles are known as pyrrolines, and the completely reduced tetrahydro-pyrroles as pyrrolidines. 1961 G. M. Badger Chem. Heterocyclic Compounds ii. 17 3-Pyrrolines have been isomerized to the corresponding 1-pyrrolines by heating with Raney nickel. 2005 Dyes & Pigments 65 206/2 The azomethine ylide..has been used to prepare five membered heterocycles containing one nitrogen atom, i.e. pyrroles, pyrrolines, and pyrrolidines. This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022). < n.1881
随便看	bob for apples, cherries bob in bob major bob maximus bob minor bob of bob off bob on bob out of bob royal bob triple bob's bob's your uncle bob's your uncle bob-a-cherry bob-apple bob-balance bob-cherry bob-chin bob-curl bob-fly bob-fool bob-haired bob-her bob-jerom bob-majoring