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- Molecular formula: C4H5N
- Molar mass: 67.089
- CAS Registry Number: 16199-06-7
- Appearance: Pyrrole, 98+%; Pyrrole, 98+%; Colourless to yellowish liquid; Nutty, sweet, warm, ethereal aroma; colourless to brown liquid with chloroform odour
- Melting point: -23 °C
- Boiling point: 130 to 131 °C
- Solubility: Water, 4.5e+004 mg/L (25 deg C)
- Safety sheet: Not available
- Spectra: ChemSpider (IR), NMRShiftDB 13C NMR, also check on SDBS. Add Spectra (Help).
Pyrrole is a heterocyclic aromatic organic compound, a five-membered ring with the formula C4H4NH. It is a colourless volatile liquid that darkens readily upon exposure to air. Substituted derivatives are also called pyrroles, e.g., N-methylpyrrole, C4H4NCH3. Porphobilinogen, a trisubstituted pyrrole, is the biosynthetic precursor to many natural products such as heme.
Polypyrrole (PPy) is a type of organic polymer formed by polymerization of pyrrole. Polypyrroles are conducting polymers, related members being polythiophene, polyaniline, and polyacetylene. The Nobel Prize in Chemistry was awarded in 2000 for work on conductive polymers including polypyrrole.
1H-Pyrrole (IUPAC Name); azole; pyrol; Pyrrole
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