Hydroxybenzoquinone
A hydroxybenzoquinone (formula: ) is any of several organic compounds that can be viewed as derivatives of a benzoquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). In general, the term may mean any benzoquinone derivative where any number ''n'' of hydrogens have been replaced by ''n'' hydroxyls, so that the formula is . In this case the number ''n'' (which is between 1 and 4) is indicated by a multiplier prefix (mono-, di-, tri-, tetra-, penta-, or hexa-). The unqualified term "hydroxybenzoquinone" usually means a derivative of 1,4-benzoquinone. Other hydroxy- compounds can be derived from the other isomer, namely 1,2-benzoquinone or ''ortho''-benzoquinone. The IUPAC nomenclature uses dihydrobenzenedione instead of "benzoquinone", with the necessary prefixes to indicate the positions of the carbonyl oxygens (=O) — as in 2,3-dihydroxy-1a,4a-dihydrobenzene-1,4-dione (= 2,3-dihydroxy-1,4-benzoquinone). The hydroxybenzoquinones (in the particular or ...
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Chloranilic Acid
Chloranilic acid is an organic compound with the chemical formula . It is a red-orange solid. The compound is obtained by hydrolysis of chloranil: : It is centrosymmetric, planar molecule. It also crystallizes as a dihydrate. Chloranilic acid is a noteworthy hydroxyquinone that is somewhat acidic owing to the presence of the two chloride substituents. The conjugate base, C6H2Cl2O4]2- readily forms coordination complexes often linking pairs of many metal ions. See also * Chloranil Chloranil is a quinone with the molecular formula C6Cl4O2. Also known as tetrachloro-1,4-benzoquinone, it is a yellow solid. Like the parent benzoquinone, chloranil is a planar molecule J.-M. Lü, S. V. Rosokha, I. S. Neretin and J. K. Kochi, "Qui ... References {{ketone-stub Chlorobenzenes 1,4-Benzoquinones Hydroxybenzoquinones ...
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C6H4O5
The molecular formula C6H4O5 may refer to: *2,5-Furandicarboxylic acid * 2,4-Furandicarboxylic acid * 3,4-Furandicarboxylic acid *Trihydroxybenzoquinone ** 2,3,5-Trihydroxy-1,4-benzoquinone ** 3,4,5-Trihydroxy-1,2-benzoquinone ** 3,4,6-Trihydroxy-1,2-benzoquinone See also * Hydroxybenzoquinone A hydroxybenzoquinone (formula: ) is any of several organic compounds that can be viewed as derivatives of a benzoquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). In general, the term may mean any benzoquinone derivat ...

C6H4O4
The molecular formula C6H4O4 may refer to: *Coumalic acid * Dihydroxybenzoquinones ** 2,3-Dihydroxy-1,4-benzoquinone ** 2,5-Dihydroxy-1,4-benzoquinone ** 2,6-Dihydroxy-1,4-benzoquinone ** 3,4-Dihydroxy-1,2-benzoquinone ** 3,5-Dihydroxy-1,2-benzoquinone ** 3,6-Dihydroxy-1,2-benzoquinone ** 4,5-Dihydroxy-1,2-benzoquinone * 5-Carboxyfurfuraldehyde * 2-Furylglyoxylic acid * 3-Furylglyoxylic acid See also * Hydroxybenzoquinone A hydroxybenzoquinone (formula: ) is any of several organic compounds that can be viewed as derivatives of a benzoquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). In general, the term may mean any benzoquinone derivat ...

C6H4O3
The molecular formula C6H4O3 may refer to: * 2,5-Diformylfuran * 2,4-Diformylfuran * 3,4-Diformylfuran *Monohydroxybenzoquinone ** 2-Hydroxy-1,4-benzoquinone ** 3-Hydroxy-1,2-benzoquinone ** 4-Hydroxy-1,2-benzoquinone * 4-Cyclohexene-1,2,3-trione * 2,5-Oxepindione * 2,7-Oxepindione See also * Hydroxybenzoquinone A hydroxybenzoquinone (formula: ) is any of several organic compounds that can be viewed as derivatives of a benzoquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). In general, the term may mean any benzoquinone derivat ...

Hydroxyquinone
Hydroxyquinone often refers to a hydroxybenzoquinone, any organic compound with formula which can be viewed as a derivative of a benzoquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). When unqualified, the terms usually mean specifically the compound 2-hydroxy-1,4-benzoquinone, derived from 1,4-benzoquinone or ''para''-benzoquinone (which often called just "quinone"). More generally, the term may refer to any derivative of any quinone (such as 1,2-benzoquinone, 1,4-naphthoquinone or 9,10-anthraquinone), where any number ''n'' of hydrogens have been replaced by ''n'' hydroxyls. In this case the number ''n'' is indicated by a multiplier prefix (mono-, di-, tri-, etc.), and the parent quinone's name is used instead of just "quinone" — as in tetrahydroxy-1,4-benzoquinone. File:Tetrahydroxy-1,4-benzoquinone-2D-skeletal.png, Tetrahydroxy-1,4-benzoquinone File:Juglone.png, 5-Hydroxy-1,4-naphthoquinone(Juglone) File:Alizarin chemical structure.png, 1, ...
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Hydroxyanthraquinone
A hydroxyanthraquinone (formula: C14H9O2(OH)) is any of several organic compounds that can be viewed as derivatives of an anthraquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). The IUPAC nomenclature recommends hydroxyanthracenedione. Usually "hydroxyanthraquinone" refers to a derivative of 9,10-anthraquinone. Quoted by Khalafy and Bruce. Quoted by Khalafy and Bruce. Isomers In general, the term may mean any anthraquinone derivative where any number ''n'' of hydrogens have been replaced by ''n'' hydroxyls, so that the formula is . In this case, the number ''n'' (which is between 1 and 8) is indicated by a multiplier prefix A prefix is an affix which is placed before the stem of a word. Adding it to the beginning of one word changes it into another word. For example, when the prefix ''un-'' is added to the word ''happy'', it creates the word ''unhappy''. Particu ... (mono-, di-, tri-, up to octa-). Additional hydroxy- compounds can be derived ...
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Hydroxynaphthoquinone
A hydroxynaphthoquinone (formula: ) is any of several organic compounds that can be viewed as derivatives of a naphthoquinone through replacement of one hydrogen atom (H) by a hydroxyl group (-OH). In general, the term may mean any naphthoquinone derivative where any number ''n'' of hydrogens have been replaced by ''n'' hydroxyls, so that the formula is . In this case the number ''n'' (which is between 1 and 6) is indicated by a multiplier prefix (mono-, di-, tri-, tetra-, penta-, or hexa-). The unqualified term "hydroxynaphthoquinone" usually means a derivative of 1,4-naphthoquinone. Other hydroxy- compounds can be derived from other isomers of the latter, such as 1,2-naphthoquinone and 2,6-naphthoquinone. The IUPAC nomenclature uses dihydronaphthalenedione instead of "naphthoquinone", with the necessary prefixes to indicate the positions of the carbonyl oxygens (=O) — as in 5,8-dihydroxy-1a,8a-dihydronaphthalene-1,4-dione (= 5,8-dihydroxy-1,4-naphthoquinone). The hydroxyn ...
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2-Hydroxy-1,4-benzoquinone
Hydroxy-1,4-benzoquinone, also called hydroxy-''para''-benzoquinone, is an organic compound with formula , formally derived from 1,4-Benzoquinone by replacing one hydrogen atom with a hydroxyl (OH) group. It is one of three hydroxybenzoquinone isomers and one of the simplest hydroxyquinones. The compound is often called 2-hydroxy-1,4-benzoquinone, but the "2-" prefix is superfluous since there is no other hydroxy derivative of 1,4-benzoquinone. The IUPAC name is 2-hydroxycyclohexa-2,5-diene-1,4-dione. It is formed by the reaction of 1,4-benzoquinone with hydrogen peroxide and is a byproduct of the metabolism of phenols, such as 1,2,4-benzenetriol. The enzyme 1,2,4-benzenetriol dehydrogenase catalyzes the conversion of 1,2,4-benzenetriol to 2-hydroxy-1,4-benzoquinone, and the enzyme hydroxybenzoquinone reductase A hydroxybenzoquinone (formula: ) is any of several organic compounds that can be viewed as derivatives of a benzoquinone through replacement of one hydrogen atom (H ...
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2,3,5,6-Tetrahydroxy-1,4-benzoquinone
Tetrahydroxy-1,4-benzoquinone, also called tetrahydroxy-''p''-benzoquinone, tetrahydroxybenzoquinone, or tetrahydroxyquinone (THBQ, THQ), is an organic compound with formula . Its molecular structure consists of a cyclohexadiene ring with four hydroxyl groups and two ketone groups in opposite (''para'') positions. The compound gives a light red solution in water, and crystallizes as the glistening bluish-black (but non-conducting) dihydrate . The compound can be synthesized from glyoxal or from ''myo''-inositol, a natural compound widely present in plants. THBQ forms an adduct with 4,4′-bipyridine in a 2:3 ratio. Salts of THBQ Like most phenols, THBQ is acidic and easily loses the four hydrogen ions from the hydroxyl groups, yielding anions such as and . The latter is symmetric and aromatic, as the double bonds and negative charges are evenly distributed over the six CO groups. The calcium salt is the dark purple pigment produced from inositol by '' Chromohalobacter beij ...
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2,5-Dihydroxy-1,4-benzoquinone
2,5-Dihydroxy-1,4-benzoquinone or 2,5-dihydroxy-''para''-benzoquinone is an organic compound with formula , formally derived from 1,4-benzoquinone by replacing two hydrogen atoms with hydroxyl (OH) groups. It is one of seven dihydroxybenzoquinone isomers. It is a yellow solidOnkar Singh, Aran Kumar, and Karan Singh (2012)"Polymeric complexes of 2,5-Dihydroxy-1,4-benzoquinone with some Lanthanides" International Journal of Scientific and Research Publications, volume 2, issue 9 ISSN 2250-3153 with planar molecules that exhibits ferroelectric properties. The compound is a weak acid: one or both hydroxyls can lose a proton to yield the anions (pKa1 = 2.95) and (pKa2 = 4.87), respectively. The latter forms a variety of metal complexes, functioning as a binucleating ligand. The compound has been identified as partly responsible for the color of aged cellulosic materials.Hosoya, Takashi; French, Alfred D.; Rosenau, Thomas "Chemistry of 2,5-dihydroxy- ,4benzoquinone, a key chromo ...
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