4-Nitropyridine-N-oxide

4-Nitropyridine-N-oxide is a chemical compound, crystallizing in space group Pnma.^[1]

Quick facts Names, Identifiers ...

4-Nitropyridine-N-oxide

Names
Preferred IUPAC name 4-Nitropyridin-1-ium-1-olate
Identifiers
CAS Number	1124-33-0 Y
3D model (JSmol)	Interactive image
ChemSpider	13662
ECHA InfoCard	100.013.088
PubChem CID	14300
UNII	ULB29Z652D Y
CompTox Dashboard (EPA)	DTXSID9041524
InChI InChI=1S/C5H4N2O3/c8-6-3-1-5(2-4-6)7(9)10/h1-4H Key: RXKNNAKAVAHBNK-UHFFFAOYSA-N InChI=1/C5H4N2O3/c8-6-3-1-5(2-4-6)7(9)10/h1-4H Key: RXKNNAKAVAHBNK-UHFFFAOYAT
SMILES c1c[n+](ccc1[N+](=O)[O-])[O-]
Properties
Chemical formula	C5H4N2O3
Molar mass	140.098 g·mol−1
Structure[1]
Space group	Pnma
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Close

It is highly toxic when consumed orally.^[2] It is also weakly carcinogenic, requiring a pre-existing oncovirus infection to have any effect.^[3]

E. coli bacteria struggle to sense quorum in the presence of para-nitropyridine oxide,^[4] and the compound physically prevents P. aeruginosa from adhering to surfaces.^[5]

para-Nitropyridine oxide also forms cocrystals. The cocrystal with mercuric chloride links together the molecular π systems, generating a large third harmonic response.^[6] The 1:1 cocrystal with nitrophenol also exhibits nonlinear optical effects, presumably due to strong hydrogen bonding.^[7]