Title: Quinoxaline
CAS Registry Number: 91-19-0
Additional Names: 1,4-Benzodiazine; benzo[a]pyrazine; benzoparadiazine; phenpiazine
Molecular Formula: C8H6N2
Molecular Weight: 130.15
Percent Composition: C 73.83%, H 4.65%, N 21.52%
Literature References: Prepd from o-phenylenediamine and glyoxal or glyoxal sodium bisulfite: Hinsberg, Ber. 17, 320 (1884); Ann. 237, 334 (1887); Jones, McLaughlin, Org. Synth. 30, 86 (1950).
Properties: Crystals, mp 29-30°. Odor of quinoline when cool, odor of piperidine when hot. d448 (liq) 1.1334. bp760.3 229.5°. bp12 108-111°. nD48 1.6231. Very freely sol in water, alc, ether, benzene.
Melting point: mp 29-30°
Boiling point: bp760.3 229.5°; bp12 108-111°
Index of refraction: nD48 1.6231
Density: d448 (liq) 1.1334
Derivative Type: Monohydrate
Properties: Crystals, mp 37°.
Melting point: mp 37°
Derivative Type: Sulfate
Molecular Formula: C8H6N2.H2SO4
Molecular Weight: 228.23
Percent Composition: C 42.10%, H 3.53%, N 12.27%, S 14.05%, O 28.04%
Properties: Leaflets, mp 186-187°. Freely sol in water. Less sol in alcohol.
Melting point: mp 186-187°
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