Nitrodihydroxybenzenes

The nitrodihydroxybenzenes form a group of aromatic compounds that are derived from phenol or dihydroxybenzenes as well as from nitrobenzene . The structure consists of a benzene ring with two attached hydroxyl groups  (-OH) and a nitro group  (-NO ₂ ) as substituents . Their different arrangement results in six constitutional isomers with the empirical formula C ₆ H ₅ NO ₄ .

Uniform naming is difficult because the dihydroxybenzenes do not form a common common name. They can therefore be understood as derivatives of catechol (2 isomers), resorcinol (3 isomers) and hydroquinone (1 isomer). Conversely, they can be viewed as dihydroxy derivatives of nitrobenzene. They are usually referred to as nitro derivatives, i.e. nitrodihydroxybenzenes .

Nitrodihydroxybenzenes
Surname	3-nitrocatechol , 1,2-dihydroxy- 3-nitrobenzene	4-nitrocatechol , 1,2-dihydroxy- 4-nitrobenzene	2-nitroresorcinol , 1,3-dihydroxy- 2-nitrobenzene	4-nitroresorcinol , 1,3-dihydroxy- 4-nitrobenzene	5-nitroresorcinol , 1,3-dihydroxy- 5-nitrobenzene	Nitrohydroquinone , 1,4-dihydroxy- 2-nitrobenzene
Structural formula
CAS number	6665-98-1	3316-09-4	601-89-8	3163-07-3		16090-33-8
PubChem	4675622	1751	11760	76623		4313918
Molecular formula	C 6 H 5 NO 4
Molar mass	155.11 g mol −1
Physical state	firmly
Melting point		173-177 ° C	81-83 ° C
GHS labeling	no GHS pictograms	no GHS pictograms	Caution	no GHS pictograms	no GHS pictograms	no GHS pictograms
H and P phrases	no H-phrases	no H-phrases	302 + 312 + 332-315-319-335	no H-phrases	no H-phrases	no H-phrases
	no EUH phrases	no EUH phrases	no EUH phrases	no EUH phrases	no EUH phrases	no EUH phrases
	no P-phrases	no P-phrases	261-280-305 + 351 + 338	no P-phrases	no P-phrases	no P-phrases

Individual evidence

1. ↑ Karl Elbs: Ueber Nitrohydroquinone , in: J. Prakt. Chem. , 1893 , 48 , pp. 179-185, doi : 10.1002 / prac.18930480123 .
2. ↑ ^{a b} Data sheet 4-Nitrocatechol from Sigma-Aldrich , accessed on March 18, 2011 ( PDF ).
3. ↑ ^{a b} data sheet 2-nitroresorcinol from Sigma-Aldrich , accessed on March 20, 2011 ( PDF ).

Web links

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