Polysubstituted Benzene Hydrocarbons

T0733 Sonotech, Inc., Cello Pulse Combustion Burner System T0746 STC Remediation, Inc., Solidification/Stabilization Technology T0756 Supercritical Water Oxidation—General 

T0782 Terra-Kleen Response Group, Inc., Solvent Extraction Technology T0785 TerraTherm Environmental Services, Inc., Thermal Wells T0794 Thermal Desorption—General 

T0822 U.S. EPA National Risk Management Research Laboratory, Base-Catalyzed Decomposition 

T0867 Waste Management, Inc., DeChlor/KGME Process T0889 White-Rot Fungus—General 

T0090 Beco Engineering Company, Alka/Sorb 

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Trichlorophenoxyacetic, 2,4,5 Acid Dioxin and Related Compounds Dioxin and Related Compounds HxCDF Hexachlorodibenzofurans TCDD Tetrachlorodibenzodioxins TCDF Tetrachlorodibenzofurans Disubstituted and Polysubstituted Benzene Hydrocarbons Diethyl Benzene... 

Diethyl Benzene under Disubstituted and Polysubstituted Benzene Hydrocarbons Diethyl Ether under Noncyclic Aliphatic or Aromatic Ethers Dihalogenated and Polyhalogenated Ethers... 

Indene Dihydroindene under Disubstituted and Polysubstituted Benzene Hydrocarbons Indene under Polycyclic Hydrocarbons, Nonaltemant Compounds with Two or Three Fused Rings Indeno(l,2,3-C(i0pyrene under Poiycyciic Hydrocarbons, Nonaltemant Compounds with More Than Five Fused Rings Iodine Iron... 

Xylenes under Disubstituted and Polysubstituted Benzene Hydrocarbons Zinc... 

In Table 10-3 we have collected experimental S values for adsorption on alumina of 48 polysubstituted benzenes and substituted naphthalenes. These data provide a good collective example of the effects of sample localization on sample adsorption energy. Values of QJ for all the groups i represented in the samples of Table 10-3 can be derived through Eq. (10-1) from experimental S values for the unsubstituted hydrocarbons, benzene and naphthalene, and appropriate monosubstituted benzenes e.g., anisole, nitrobenzene, aniline.t Table 10-2 summarizes these values. This in turn permits the calculation of 2 Ql for each of the compounds of Table 10-3. The latter quantity will be equal to S for the compound in question, if Eq. (10-1) applies and 0 values for a given group i are constant in all compounds of which i is a part. However, the localization of a polyfunctional sample moleculej should be reflected in a value of S which is less than because of the corresponding delocalization of some... 

Fig. 3a-b. Distribution of Ring Energy Content for benzenoid hydrocarbons and polysubstituted benzene derivatives. The interquartile ranges for the distribution are 25.9 kcal/mol and 16.1 kcal/mol,... 

Table 16. Mean Values of HOMA, EN, and GEO Terms for the Ring of Polysubstituted Benzene Derivatives Compared with Topologically Equivalent Rings in Benzenoid Hydrocarbons...

A question arises, how does the ring respond in these two situations in terms of aromaticity The problem was analyzed in detail for X-ray measured molecular geometries of polysubstituted benzenes and benzenoid hydrocarbons. ° According to the positions of substitution in benzene, 12 classes were defined and used for both groups of systems, as shown in the schemes in Table 16. 

Polysulfonation is especially pronounced with polycyclic compounds. Hydrocarbons such as anthracene or phenanthrene polysulfonate so easily that the preparation of a monosulfonate always involves the formation of substantial amounts of the undesired polysubstituted compounds, even in the presence of unreacted hydrocarbon. Benzene and naphthalene are, however, easily monosulfonated without substantial disulfonation. 

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