Organic compounds forming

Picrates, Many aromatic hydrocarbons (and other classes of organic compounds) form molecular compounds with picric acid, for example, naphthalene picrate CioHg.CgH2(N02)30H. Some picrates, e.g., anthracene picrate, are so unstable as to be decomposed by many, particularly hydroxylic, solvents they therefore cannot be easily recrystaUised. Their preparation may be accomplished in such non-hydroxylic solvents as chloroform, benzene or ether. The picrates of hydrocarbons can be readily separated into their constituents by warming with dilute ammonia solution and filtering (if the hydrocarbon is a solid) through a moist filter paper. The filtrate contains the picric acid as the ammonium salt, and the hydrocarbon is left on the filter paper. 

Certain organic compounds form reversible gels with poly(vinyl alcohol). Congo red, for example, yields a red gel that melts sharply at about 40°C. Other organic compounds that form temperature-reversible complexes with PVA include a2o dyes, resorcinol, catechol, and gaUic acid (168—170). 

Certain organic compounds form complexes with platinum, and this accounts for the fact that the thin coating of platinum on titanium is rapidly corroded when platinised titanium is used as an anode in plating baths containing organic addition agents. 

An ester is an organic compound formed from the condensation reaction between a carboxylic acid and an alcohol. A water molecule is eliminated as the oxygen atom of the alcohol links to the carbon atom of the carbonyl group. For example, ethanol reacts with acetic acid to give ethyl acetate ... 

An eel of an europium (III) chelate was reported before (60 ). The complex was not involved in the electrolysis. Excited organic compounds formed electrochemically underwent an intermolecular energy transfer to the emitting Eu compound. Interestingly, in the absence of the redox-active organic compounds an eel of the europium chelate was not observed 2+... 

An unstable organic compound formed by the addition of ozone to an olefmic compound, the addition of one molecule of ozone taking place at each double bond. 

Wania, F., Lei, Y.D., Hamer, T. (2002) Estimating octanol-air partition coefficients of nonpolar semivolatile organic compounds form gas chromatographic retention times. Anal. Chem. 74, 3478-3483. 

Pyral A process for destroying toxic waste oiganochlorine compounds. The wastes are mixed with carbon and sodium carbonate and injected into a graphite-lined arc furnace. Metallic sodium, formed by reduction of the sodium carbonate by the carbon, attacks the chlorinated organic compounds, forming sodium chloride. Developed by Hydro-Quebec in the late 1980s but not yet commercialized. 

Kerogen The complex mixture of solid organic compounds formed from the diagenesis and catagenesis of soils and marine sediments. 

Glaze WH, Henderson JE, Smith G (1975) Analysis of new chlorinated organic compounds formed by chlorination of municipal wastewater. In Jolley RJ (ed) Water chlorination environmental impact and health effects. Ann Arbor Science, Ann Arbor, MI, pp 139-159... 

Serotonin—An organic compound formed from tryptophan and found in animal and human tissue, especially the brain, blood serum, and gastric mucous membranes, and active in vasoconstriction, stimulation of the smooth muscles, transmission of impulses between nerve cells, and regulation of cyclic body processes. 

The bonds have a cation at one end and an anion at the other. This excludes the majority of organic compounds but does not exclude the polar bonds that many organic compounds form. The model thus covers the bonds found in inorganic compounds, their solutions, and melts, but it also extends to acid-base bonds found in other systems, particularly the important aqueous chemistry of living organisms. 

Problem 6.19 Write the structural formula and name of the principal organic compound formed in the following reactions ... 

Esters A family of organic compounds formed by the reaction of an alcohol with a carboxylic acid in the presence of concentrated H2S04. This type of reaction is known... 

Decesari, S., Facchini, M. C., Matta, E., Mircea, M., Fuzzi, S., Chughtai, A. R., and Smith, D. M. (2002). Water soluble organic compounds formed by oxidation of soot. Atmos. Environ. 36,1827-1832. 

Nitrogen atoms of organic compounds form relatively strong hydrogen bond with OH group of a host compound and amines, amine X-oxides, oximes, and esters of amino acids can be resolved efficiently by complexation with a chiral host. Optical resolutions of these compounds are described. 

The organic compounds formed (e.g. thiolanes) may be unstable to pyrolysis and will release the isotopically heavy H20 which will mix with H2S released from the kerogen. The total sulfur isotope effects measure were very small, resulting in a total measured ... 

Some achiral organic compounds form chiral crystals, with each crystal exhibiting one of two possible enantiomorphs [9-13]. These chiral crystals composed of an achiral organic compound may serve as an efficient chiral seed in a prebiotic world, therefore, a study of asymmetric autocatalysis using these chiral organic crystals is an interesting subject. 

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