Benzoquinone monooxime

Benzoquinone monooxime and derivs 2 B85—B86 benzoquinone-1 -(j3-chloroethylimine)-4-oxime 2 B8S... 

The diprotonated benzoquinone monooximes have also been studied. Using low temperature NMR, dications such as 203 can be directly observed (eq 70)64. Little work has been done to study the electrophilic chemistry of these ionic species, although Shudo and Okamato generated dication 204 in superacid and found it capable of reacting with phenol (eq 71).65... 

Primary and secondary nitroso compounds usually stabilize themselves, even under the conditions of their preparation, by passing irreversibly into their isomers, the oximes. In tertiary aliphatic nitroso compounds this transformation is accompanied by fission of the neighboring carbon-carbon bond by hydrolysis or decarboxylation. Aromatic nitroso compounds are more stable, and when oxime formation does occur this is usually reversible within the framework of a true tautomeric equilibrium for instance, the tautomeric pair -nitrosophenol/p-benzoquinone monooxime is obtained both by nitrosation of phenol and by oximation of />-benzoquinone. 

Medical pharmaceutical rubber Phenolic antioxidants Silica gel Ce,H , Ce,H6-C6H,4 (75 25) CftHft-EtOAc- MejCO (100 5 1) A-chloro-2,6- dichloro-p- benzoquinone- monooxime Adsorption 3 8 hindered phenols found (in 102 samples)... 

Benzoquinonemonooxime ond Derivatives Beiizoquinonemonooxime, CgHsNG2 mw 123-11, N 11.38%. This compd exists as ortho and para isomers Benzoquinone-l,2 monooxime [called B en zoc hinon-( 1.2)-monoxim o-Chinon-monoxim or "o-Nitroso-phenol" in Ger], cH- ==-=CH ... 

Silver salt, AgCgH4N02, almost black, but dk blue in transmitted light, fine crysts, expl on heating or on contact with acids Sodium salt, NaCgK4N02, red-grn shiny Ifts, expl on heating Benzoquinone-1,4-monooxime [called Benzo-chinon-(1.4)-monoxim p-Ohinon-monoxim or "p -Nitroso-phenol in Ger],, CH=CH. 

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