Picoline-N-oxide

Picoline-N-oxides
	Chemical structures of 2-, 3-, and 4-picoline-N-oxide (left to right)
Identifiers
CAS Number	2-Picoline-N-oxide: 931-19-1 ; 3-Picoline-N-oxide: 1003-73-2 ; 4-Picoline-N-oxide: 1003-67-4 ;
3D model (JSmol)	2-Picoline-N-oxide: Interactive image; 3-Picoline-N-oxide: Interactive image; 4-Picoline-N-oxide: Interactive image;
ChEBI	2-Picoline-N-oxide: CHEBI:35578;
ChEMBL	2-Picoline-N-oxide: ChEMBL3186013;
EC Number	2-Picoline-N-oxide: 213-230-3; 3-Picoline-N-oxide: 213-714-4; 4-Picoline-N-oxide: 213-712-3;
PubChem CID	2-Picoline-N-oxide: 13602; 3-Picoline-N-oxide: 13858; 4-Picoline-N-oxide: 13857;
UNII	2-Picoline-N-oxide: G41PJ47D1I; 3-Picoline-N-oxide: YA9Q5YUG2M; 4-Picoline-N-oxide: QIY3009LEH;
	InChI 2-Picoline-N-oxide: InChI=1S/C6H7NO/c1-6-4-2-3-5-7(6)8/h2-5H,1H3 Key: CFZKDDTWZYUZKS-UHFFFAOYSA-N; 3-Picoline-N-oxide: InChI=1S/C6H7NO/c1-6-3-2-4-7(8)5-6/h2-5H,1H3 Key: DMGGLIWGZFZLIY-UHFFFAOYSA-N; 4-Picoline-N-oxide: InChI=1S/C6H7NO/c1-6-2-4-7(8)5-3-6/h2-5H,1H3 Key: IWYYIZOHWPCALJ-UHFFFAOYSA-N;
	SMILES 2-Picoline-N-oxide: CC1=CC=CC=[N+]1[O-]; 3-Picoline-N-oxide: CC1=C[N+](=CC=C1)[O-]; 4-Picoline-N-oxide: CC1=CC=[N+](C=C1)[O-];
Properties
Chemical formula	C6H7NO
Molar mass	109.128 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Picoline-N-oxide describes any of three isomers with the formula CH₃C₅H₄NO. All are colorless solids. Their properties and those of pyridine-N-oxide (C₅H₅NO) are similar.

Picoline-N-oxides (data from Chemical Abstracts unless noted otherwise)
Parameter	2-Picoline-N-oxide	3-Picoline-N-oxide	4-Picoline-N-oxide
Melting point (°C)	48-50	39	184
Boiling point (°C)	89-90 (0.8-0.9 Torr)^[1]	156 (16 Torr)	122-124 (1.5 Torr)

References

^ Ross, Sidney D.; Kelley, Donald J.; Labes, Mortimer M. (1956). "Molecular Compounds. VII. Interactions between 1,3,5-Trinitrobenzene and Pyridine-N-Oxides in Chloroform Solution". Journal of the American Chemical Society. 78 (15): 3625–3627. Bibcode:1956JAChS..78.3625R. doi:10.1021/ja01596a019.

[1] Ross, Sidney D.; Kelley, Donald J.; Labes, Mortimer M. (1956). "Molecular Compounds. VII. Interactions between 1,3,5-Trinitrobenzene and Pyridine-N-Oxides in Chloroform Solution". Journal of the American Chemical Society. 78 (15): 3625–3627. Bibcode:1956JAChS..78.3625R. doi:10.1021/ja01596a019.

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