Hydrocarbons phenanthrene

An isomeric system is related to the benzenoid hydrocarbon phenanthrene. Both the [Pg.521]

Stuppeasdure, /. stuppeic acid, stuppeaic acid. Stuppfett, n. a greasy mixture of hydrocarbons (phenanthrene, pyrene, etc.) obtained in refining stupp. 

Solbakken, J.E., K. Ingebrigtsen, and K.H. Palmork. 1984. Comparative study on the fate of the polychlorinated biphenyl 2,4,5,2,4,5,-hexachlorobiphenyl and the polycyclic aromatic hydrocarbon phenanthrene in flounder (Platichthys flesus), determined by liquid scintillation counting and autoradiography. Mar. Biol. 83 239-246. 

The two isomeric polycyclic aromatic hydrocarbons phenanthrene and anthracene are solids at 25°C. Although these compounds have almost the same boiling point (see below), their vapor pressures at 25°C differ by more than one order of magnitude (see Appendix C). Explain these findings. What differences would you expect for the subcooled liquid vapor pressures of the two compounds at 25°C ... 

Gschwend and Hites (1981) observed that the two closely related polycyclic aromatic hydrocarbons, phenanthrene and anthracene, occur in a ratio of about 3-to-l in urban air. In contrast, sedimentary deposits obtained from remote locations (e.g., Adirondack mountain ponds) exhibited phenanthrene-to-anthracene ratios of 15-to-l. You hypothesize that these chemicals are co-carried in aerosol droplets from Midwestern U.S. urban environments via easterly winds to remote locations (like the Adirondacks) where the aerosol particles fall out of the atmosphere and rapidly accumulate in the ponds sediment beds without any further compositional change (i.e., the phenanthrene-to-anthracene ratio stops changing after the aerosols leave the air). If summertime direct photolysis was responsible for the change in phenanthrene-to-anthracene ratio, estimate how long the aerosols would have to have been in the air. Comment on the assumptions that you make. What are your conclusions ... 

Di-phenic Acid.—A di-carboxy acid of di-phenyl in which the two carboxyls are both ortho to the ring linkage is of importance in connection with the constitution of another hydrocarbon, phenanthrene, which will be studied later (p. 806). It is known as di-phenic acid. 

EXAMPLE 12.8 Structurally cholesterol is classified as a steroid. Steroids are structural derivatives of the aromatic hydrocarbon phenanthrene (Fig. 12-4) they are reduced and contain an additional five-member ring hence the name cyclopentanoperhydrophenanthrene. 

As mentioned earlier, the tricyclic aromatic hydrocarbon phenanthrene, when treated with HOCl at pHs above 4, was converted mainly to the epoxide, phenanthrene-9,10-oxide (16 Oyler et al., 1983). The mechanism of formation of the epoxide under these conditions is not clear. 

Catalytic properties of complexes of multi-valenced metals with poly(ethylene glycol) (PEG) and polyurethane (PU) have been studied during liquid-phase oxidation processes such as the liquid-phase oxidation of hydrocarbons (phenanthrene, tetralin, cyclohexene), decomposition of hydroperoxides, hydrocarbons and decomposition of hydrogen peroxide [101 -106]. The kinetics of these reactions have been studied. The rate and selectivity of a particular reaction process depend not only on the properties... 

At this point, we can introduce an entirely different system of nomenclature that is nevertheless accepted by lUPAC and is extremely valuable in multicyclic and bridged saturated systems. This is the replacement system, where the hydrocarbon name that would correspond to the entire ring structure, as if no heteroatom were present, is stated, and then given a Hantzsch-Widman prefix and number for the heteroatom(s). Thus, phenanthridine shown previously has the ring framework of the hydrocarbon phenanthrene, with N at position 5. The replacement name would be 5-azaphenanthrene. 

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