pyrrole

[ pi-rohl, pir-ohl ]

Phonetic (Standard)IPA

noun

, Chemistry.

a colorless, toxic, liquid, five-membered ring compound, C 4 H 5 N, that is a component of chlorophyll, hemin, and many other important naturally occurring substances.

pyrrole

/ pɪˈrəʊl; pɪˈrɒlɪk; ˈpɪrəʊl /

a colourless insoluble toxic liquid having a five-membered ring containing one nitrogen atom, found in many naturally occurring compounds, such as chlorophyll. Formula: C 4 H 5 N Also calledazole

pyrrole

/ pîr′ōl′ /

Any of a class of organic compounds having a five-member ring composed of four carbon atoms and one nitrogen atom. The pyrrole ring structure is a component of many biologically important compounds, including porphyrins, alkaloids, and certain amino acids.
The simplest of this class of compounds, in which a single hydrogen atom is attached to each atom in the ring. It has a pleasant odor similar to that of chloroform. Chemical formula: C 4 H 5 N.

Origin of pyrrole¹

1825–35; irregular < Greek pyrr ( hós ) red + -ole ²

Origin of pyrrole¹

C19: from Greek purrhos red, from pur fire + -ole ¹

This brings selenophene more akin to pyrrole than thiophene, but the group -NH- in the molecule of pyrrole is an auxochrome.

April 18, 2024petrichor

[pet-ri-kawr]

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