pyridine

American  

[pir-i-deen, -din] / ˈpɪr ɪˌdin, -dɪn /

noun

Chemistry.

1. a colorless, flammable, liquid organic base, C 5 H 5 N, having a disagreeable odor, usually obtained from coal or synthesized from acetaldehyde and ammonia: used chiefly as a solvent and in organic synthesis.

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pyridine British  

/ ˈpɪrɪˌdiːn /

noun

1. a colourless hygroscopic liquid with a characteristic odour. It is a basic heterocyclic compound containing one nitrogen atom and five carbon atoms in its molecules and is used as a solvent and in preparing other organic chemicals. Formula: C 5 H 5 N

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pyridine Scientific  

/ pĭr′ĭ-dēn′ /

1. Any of a class of organic compounds containing a six-member ring in which one of the carbon atoms has been replaced by a nitrogen atom. Pyridines include compounds used as water repellents, herbicides, and various drugs. The pyridine ring structure is also part of many larger compounds, including niacin and nicotine.

2. The simplest of these compounds, a flammable, colorless or yellowish liquid base having a penetrating odor. It is used as a solvent and waterproofing agent and in the manufacture of various drugs and vitamins. Chemical formula: C ₅ H ₅ N.

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Other Word Forms

• pyridic
  adjective

Etymology

Origin of pyridine

First recorded in 1850–55; pyr- + -id ³ + -ine ²

Example Sentences

In their latest study, which was published in Angewandte Chemie International Edition on 27 May 2024, they present a convenient methodology to access the pyridine side of quinolines and synthesize diverse 2D/3D frameworks.

From Science Daily • Jun. 19, 2024

They consist of an electron-abundant benzene ring fused to an electron-deficient pyridine ring; these electronically distinct rings can be modified independently by adjusting reaction conditions.

From Science Daily • Jun. 19, 2024

Research last year by academics, backed by the fishing industry, suggested the industrial pollutant pyridine, possibly from dredging at the mouth of the River Tees, as a potential cause.

From Seattle Times • Jan. 20, 2023

The universities' study said the chemical pyridine could have been released by dredging in the Tees and found evidence that it was highly toxic to crabs.

From BBC • Oct. 28, 2022

Another coal-tar product, viz. the pyridine base referred to in the last chapter, has been recently employed for washing anthracene with great success.

From Coal and What We Get from It by Meldola, Raphael