Naphtha lene

Common Name Bis[Acetoxy-methyl acetic acid trimethylammoniumethyl ester] -naphtha-lene-1,5-dlsulfonate... 

Dipping solution n Dissolve 100 mg dansyl chloride (S-(dimethylamino)-naphtha-lene-l-sulfonyl chloride) in 100 ml ethanol [6]. ... 

Brilliant Black BN (E 151, Black PN, Cl Food Black 1) is a bis azo dye tetrasodium 4-acetamido-5-hydroxy-6-[7-sulfonato-4-(4-sulfonato-phenylazo)-l-naphthylazo]-l,7-naphtha-lene-disulfonate. The calcium and potassium salts are also permitted. It is a black powder or granules, soluble in water, sparingly soluble in ethanol, with a maximum absorption in water at 570 mn = 530). It is not... 

The purpose of this experiment was to investigate the extent and the structural specificity of hydrogen exchange during the extraction of bituminous coal with naphthalene. Table I includes the data of an extraction experiment (E20) conducted with naphtha-lene-d8 using nitrogen as the cover gas. In the experiment, the reactants were heated at 380°C for 1 hour at 2200 psi the same apparatus was applied as in E19. After the run, the spent solvent was separated from the coal by distillation, and the coal and solvent were examined for deuterium and protium incorporation. 

A considerable amount of the strain in l,8-bis(dimethylamino)naphtha-lene is relieved by protonation and the N—H N bond length (260 pm) in the protonated amine shows that the molecule is able to adopt a conformation [55] with an intramolecular hydrogen bond (Truter and Vickery, 1972). The infra-red spectrum of protonated l,8-bis(dimethylamino)naphthalene and the chemical shift (5 19.5) of the acidic proton in the nmr spectrum confirm the presence of an intramolecular hydrogen bond (Alder et al., 1968). The magnitude of the isotope effect on the chemical shift (Altman et al., 1978) and the appearance of two Nls peaks in the photoelectron spectrum... 

The alkyl-substituent pattern for some PAHs series (e.g., alkylnaphthalenes, phenanthrene/anthracene, pyrene/fluoranthene, m/z 228 and m/z 252) are shown in Figs. 6-9, respectively. The parent PAHs and their alkylated homologs are determined in GC-MS data by monitoring their corresponding molecular weights. For example, for the naphthalene series the ions at m/z 128,142 methyl-naphthalenes, 156 C2-naphthalenes, 170 C3-naphthalenes, and 184 C4-naphtha-lenes are monitored (Fig. 6). The GC elution orders of the C2-naphthalene and C3-naphthalene isomers have been reported [144,145]. 

Jang and McDow (1997) studied the photodegradation of benzo[a]anthracene in the presence of three common constituents of atmospheric aerosols reported to accelerate benzo [a] anthracene, namely 9,10-anthroquinone, 9-xanthone, and vanillin. The photo-degradation experiments were conducted using a photochemical reactor equipped with a 450-W medium pressure mercury arc lamp and a water bath to maintain the solution temperature at 16 °C. The concentration of benzo [a] anthracene and co-solutes was 10" M. Irradiation experiments were conducted in toluene, benzene, and benzene-c/e- Products identified by GC/MS, FTIR, and NMR included benzo[a]an-thracene-7,12-dione, phthalic acid, phthalic anhydride, 1,2-benzenedicarboxaldehyde, naphtha-lene-2,3-dicarboxylic acid/anhydride, 7,12-dihydrobenzo[a]anthracene, 10-benzyl-10-hydroan-thracen-9-one, benzyl alcohol, and 1,2-diphenylethanol. 

Theoretical calculations of minimum-energy structures and thermodynamic terms using self-consistent field theory with thermodynamic and solvation corrections concluded that the cyclization of l-hydroxy-8-(acetylamino)naphtha-lene 1 to give 2-methylnaphth[l,8-r7,< ][l,3]oxazine 2 with the liberation of water was much less favorable (AG = —2.0kj moP, A/7 = 4-31.0kj mol , and TAS = 4-33.1 kjmoP at 298.2 K) in the gas phase than the corresponding ring closure of l-amino-8-(acetylamino)naphthalene, which was in qualitative agreement with experimental observations for the reactions in solution <1998J(P2)635>. 

High-boiling-point aromatics in fuel can bum with more smoke (naphtha-lene compounds can form dense smoke during combustion)... 

Picric acid Dinitro- phenol TNT Trinitro- cresol Nitro- naphtha- lene Dinitro- naphtha- lene... 

A special case of an intramolecular nucleophilic reaction on the sterically hindered anion of 5-acetoxy-8-tert-butyl-2-hydroxy-l-(2-pyridyl)naphtha-lene (27) was performed by anodic oxidation.74 The product is the isolable perchlorate 28, which slowly loses isobutylene to give the zwitterion 29 [Eq. (33)]. 

Structural Analysis of the Spent Solvent The spent naphtha-lene-hs, extracted from the spent coal with ethyl ether, was examined for hydrogenation or dimerization of the solvent. No dihydronaphthalene or Tetralin were detected by lH NMR spectrometry. 

Although the parameters used were very successful in correlating the reactivity of the pyridine free base (Chapter 9), the localization energies are unsatisfactory and grossly overestimate the reactivities of a-naphtha-lene-like positions. For example, even the 4-position of quinoline is pre-... 

Figure 5. Copolymer compression set as a function of copolymer melting point for 50% alkylene ester/PTME ester copolymers (A = terephthalate O = 2,6-naphtha-lene-dicarboxylate )...

Tellurinic Acid O-Acetyl-2-naphtha-lene- E12b, 350 (R-TeO-O-TeO-R + R-COOH)... 

Wozniak, K., He, H., Klinowski, J., Jones, W., and Barr, T. L., ESCA, solid-state NMR, and X-ray diffraction monitor the hydrogen bonding in a complex of 1,8-bis(dimethylamino)naphtha-lene with 1,2-dichloromaleic acid, J. Phys. Chem. 99, 14667-14677 (1995). 

The indicator variables are D2 and D3 for simple X-catechols,D2 = 1 andforX-naphtha-lene diols, D3 = 1. The negative coefficients with both terms (D2 and D3) underscore the detrimental effects of these structural features in these inhibitors. Thus, discontinuities in the structural features of the molecules of this data set are accounted for by the use of indicator variables. An indicator variable may be visualized graphically as a constant that adjusts two parallel lines so that they are su-perimposable. The use of indicator variables in QSAR analysis is also described in the following example. An analysis of a comprehen-, sive set of nitroaromatic and heteroaromatic compounds that induced mutagenesis in TA98 cells was conducted by Debnath et al., and QSAR 1.57 was formulated (172). 

Zhur. Obshchei Khim. 21, 1329-40 (1951). UV chelation and spectra of azo-naphtha-lene dyes. 

Considering the wide-spread use of fluorescent probe techniques in biological studies, it is important that a full understanding of the photophysics of the bound and unbound probe is available to enable unambiguous interpretations of the fluorescence data. The most common probes used for fluorescence work are the anilino-naphtha-lene sulphonate derivatives, particularly l-anilino-8-naphthaiene sulphonate (ANS) (XIV) and 2-p-toluidinyl-6-naphthalene sulphonate (TNS) (XV). Changes in fluores-... 

The degradation of naphthalene-2-carboxylate by Burkholderia sp. strain JT 1500 involves formation of naphthalene-l-hydroxy-2-car-boxylate rather than initial oxidative decarboxylation. Naphtha-lene-l,2-dihydrodiol-2-carboxylate is not involved, so that possibly the reaction is carried out by a monooxygenase. Subsequent reactions produce pyruvate and o-phthalate that is degraded via 4,5-dihydroxyphthalate (Morawski et al. 1997) this has already been noted. Degradation of naphthalene carboxylates formed by oxidation of methyl groups was noted above. 

HEXACHLOROEPOXYOCTAHYDRO-e rfo,exo-DIMETHANO-NAPHTHA-LENE or HEXACHLORO-6,7-EPOXY-l,4,4A,5,6,7,8,8A-OCTA-HYDRO-l,4 5,8-DIMETHANONAPHTHALENE (60-57-1) C HgClgO Noncombustible or very difficult to bum solid. Incompatible with concentrated mineral acids, acid catalysts active metals strong oxidizers strong acids phenols, active metals and their salts (e.g., copper, iron, magnesium, potassium, sodium, zinc). Corrosive to some metals. 

If2-Naphthoquinone. J t2 Naphthalenedione naphthoquinone. Ci0H6Oj mol wt 158.15. C 75.94%, H 3.82% O 20.23%. Prepd by oxidation of 1-amino-2-napli -thol with ferric chloride Fieser, Org, Syn 17 68 (1937) by oxidation of naphthalene Milas, U S. pat. 2 395 638 (1946 io Research Corp.) by bacteria) dissimilation of naphtha lene Murphy Stone Cart, J, Microbiol. I, 579 (1955) from tetrachloro-o-ben2oquinone Horner Durckheimer Z. jVc-turforach. 14b 741 f1959)- Structure HodgsonT Hathaway, Trans. Faraday Soc. 41, 115 (1945), Spectroscopic properties Oliver et ai. Tetrahedron 24, 4067 (1968). 

Phenyi-naphthylamine-B-sulfonic acid. 1-Anilino-8-naptbalenesulfonate 1-Anilino-8-naphtha-lene-... 

Isocyanates The azide in combination with l,8-bis(dimethylamino)-naphtha-lene effects the direct conversion of carboxylic acids to isocyanates. 

Three-component formation was observed for pyrene- and naphtha-lene-/9-CD complexes in the presence of surfactants such as n-alkyl sulfates (chain length C4-C12), n-alkylammonium chlorides (Cj-Cg), and n-al-kyltrimethylammonium bromides (CiQ-Cig) [118]. The two complexes exhibit different behavior in the presence of surfactants. With respect to the value of the two-component system, increased association constants were found for pyrene (short-chain surfactants gave higher constants than long-chain). Lower association constants were found for / -CD-naph-thalene in the presence of surfactants. By following the time course of T-T absorption of the two aromatics in the presence of nitrite, it was found that their different behaviors were due to surfactant influence on the rate constants of formation (k+) and dissociation (k ) of the inclusion compound. For naphthalene, a reduction of k+ was observed in the presence of surfactants while k was unaffected. For pyrene, short-alkyl-... 

Blrks (38) compared the experimental data for the naphtha-lene/9,10-dlphenyl anthracene system in various solvents with the Voltz theory and found a considerable discrepancy between actual and expected behavior. This is perhaps due to the incorrect boundary assumptions employed by Voltz et al. ... 

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