Arene hydrocarbons

Arene hydrocarbon dioxygenases are capable of carrying out a number of reactions other than the introduction of both atoms of oxygen into the substrate. Illustrative examples of monooxygenation carried out by dioxygenases include the following ... 

Aerobic degradation of chlorinated arene hydrocarbons, including the important group PCBs, and chlorobenzoates that are produced from them as metabolites, is generally initiated by dihy-droxylation of the rings to dihydrodiols followed by dehydrogenation to catechols. Halide may be lost simultaneously and for 2-halogenated benzoates, both halide and carboxyl. Salient aspects are summarized, and attention drawn to selected aspects of enzyme inhibition. 

Decay of arene hydrocarbon radical-anions formed during preparative scale electrochemical reduction in the presence of general acids involves protonation as... 

Standard oxidation potential for complexes [Cr(arene)(CO)3] in CF3COOH + (CF3C0)20 (93 + 7%) solution is a linear function of the ionization potentials of arene hydrocarbons.The oxidation in trifluoroacetic acid is reversible, while in MeCN and DMF solutions it is irreversible.Further oxidation leads to decomposition of these complexes and the formation of chromium(III) compounds and separation of ligands. 

Aluminium oxide is amphoteric, anion a negatively charged ion. anode the positive electrode, arenes hydrocarbons containing one or more benzene rings. 

Offermann W, Mannschreck A. Chiral recognition of alkene and arene hydrocarbons by H and C NMR. Determination of enantiomeric purity. Tetrahedron Lett. 1981 22 3227 3230. 

There are a total of eighteen different hydrocarbon series, of which the most common constituents of crude oil have been presented - the alkanes, cycloalkanes, and the arenes. The more recent classifications of hydrocarbons are based on a division of the hydrocarbons in three main groups alkanes, naphthanes and aromatics, along with the organic compounds containing the non-hydrocarbon atoms of sulphur, nitrogen and oxygen. 

Carbon atoms can also form cyclic compounds. Aromatic hydrocarbons (arenes), of which benzene is the parent, consist of a cyclic arrangement of formally unsaturated carbons, which, however, give a stabilized (in contrast to their hypothetical cyclopolyenes), delocalized system. 

Another name for aromatic hydrocarbons is arenes Arenes have properties that are much different from alkanes alkenes and alkynes The most important aromatic hydrocarbon... 

The classes of hydrocarbons are alkanes, alkenes, alkynes, and arenes Alkanes are hydrocarbons in which all of the bonds are single bonds and are characterized by the molecular formula C H2 +2... 

Members of a class of arenes called polycyclic aromatic hydrocarbons possess subslanlial resonance energies because each is a colleclion of benzene rings fused logelher... 

In general arenes resemble other hydrocarbons in their physical properties They are nonpolar insoluble in water and less dense than water In the absence of polar sub stituents mtermolecular forces are weak and limited to van der Waals attractions of the induced dipole/mduced dipole type... 

Benzene is the parent of a class of hydrocarbons called arenes, or aro matic hydrocarbons... 

Section 11 9 The physical properties of arenes resemble those of other hydrocarbons... 

Compounds with two ammo groups are named by adding the suffix diamine to the name of the corresponding alkane or arene The final e of the parent hydrocarbon IS retained... 

Arene (Section 2 1) Aromatic hydrocarbon Often abbreviated ArH... 

EPA Method 25A is the instrumental analyzer method for determination of total gaseous organic concentration using a flame ionization analyzer. The method apphes to the measurement of total gaseous organic concentration of vapors consisting primarily of alkanes, alkenes, and/or arenes (aromatic hydrocarbons). The concentration is expressed in terms of propane (or other appropriate organic calibration gas) or in terms or carrion. 

Azaferrocene reacts with aromatic hydrocarbons in the presence of aluminium chloride, giving rise to the cationic complexes of the type (Ti -arene)(Ti -cyclopenta-dienyl)iron(l+) isolated as BF4 salts [87JOM(333)71]. The complex 28 is obtained by reaction of the sulfane compound [Cp(SMc2)3Fe]BF4 with pentamethyl-pyrrole [88AG(E)579 88AG(E)1468 90ICA(170)155]. The metallic site in this center reveals expressed Lewis acidity (89CB1891). 

Although many of the aromatic compounds based on benzene have pleasant odors, they are usually toxic, and some are carcinogenic. Volatile aromatic hydrocarbons are highly flammable and burn with a luminous, sooty flame. The effects of molecular size (in simple arenes as well as in substituted aromatics) and of molecular symmetry (e.g., xylene isomers) are noticeable in physical properties [48, p. 212 49, p. 375 50, p. 41]. Since the hybrid bonds of benzene rings are as stable as the single bonds in alkanes, aromatic compounds can participate in chemical reactions without disrupting the ring structure. 

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