Naphthalenes methylated

Carbomethoxy- x -phenyl- naphthalene Methyl anthranilate Naphthalene A-l 13... 

II. 4), in which the poorer transmission of the +M effect of chlorine across the 2,3-bond compared to the 1,2-bond causes a 4-fold greater deactivation across the former. Likewise, in the hydrogen exchange of naphthalene, methyl at position 2 activates the 1- and 3-positions 300 and... 

Fraenkel et al. (54) were the first to propose that the external surface of zeolites could be responsible for shape selective catalysis. Acid sites located in the half cavities on the external surface of HMFI would be responsible for the selective formation of 2,6- and 2,7-dimethylnaphthalene during naphthalene methylation (nest effect). This explanation was afterwards rejected on the basis of adsorption experiments. However, a nest effect was recently proposed to be responsible for the shape selective properties of the MCM-22 (MWW) zeolite and its delaminated analog (ITQ-4) in aromatics alkylation (55). 

Tobacco smoke contains both particulate matter (see Chapter 4) and a large number of gaseous and vapor components. These components include CO, CO2, NO, NO2, acrolein, pyridine, methyl chloride, acetaldehyde, formaldehyde, and dimethylnitrosamine. Particulate matter comprises, for example, nicotine, pyrene, benzo( )pyrene, naphthalene, methyl naphthalene, aniline, and ni-trosonomicotine. 

Methoxy-Naphthalene (Methyl- -naphthyl-ether). Cryst, mp 73—74°, bp 274°. Sol in eth, chlf benz. Prepn from K- -napthalate by heating with methyl chloride at 300°... 

Among the classes of compounds in crude oil, the alkanes, cycloalkanes, and aromatic fractions contain compounds that are volatile and are described in more detail in this chapter. The NSO compounds, resins and asphaltenes, and organometalhc compounds are nonvolatile and, in general, are less mobile in the environment. A discussion of these compounds is beyond the scope of this chapter. Examples of some of the volatile hydrocarbons present in cmde oil for the major compound classes are shown in Figure 6. Benzene, toluene, xylenes, ethylbenzene, isopropylbenzene, naphthalene, methyl- and dimethyl-naphthalenes are among the most important volatile aromatic hydrocarbons, because they are widely used and, once released into the environment, their mobility and toxicity make them a significant environmental threat (Merian and Zander, 1982). The occurrence of these compounds in the environment is almost exclusively anthropogenic, with the exception of natural hydrocarbon seeps. 

Table 4. Decay parameters for 1-vinyl naphthalene - methyl methacrylate copolymers...

The common standards are re-butane, isooctane, benzene, p-xylene, naphthalene, methyl ethyl ketone, cyclohexanone, and cyclo-hexanol. 

CCRIS 7916 EINECS 215-329-7 HSDB 1143 Methyl naphthalene Methyl naphthalene (molten) Methylated naphthalenes Methyinaftalen Methyinaphthalene 2-Methylnaphthalene Methylnaphthalenes, liquid Methyl-naphthalenes, solid Methyinapthalene Naphthalene, methyl-. Mixture of a- and p-isomers. Has been used as an insecticide. Mixture of isomers of methyinaphthalene. 

Naphthalene, hexamethyl-Naphthalene, methyl-Naphthalene, 1-methyl-Naphthalene, 2-methyl-Naphthalene, (1-methylethyl)-Naphthalene, methylphenyl-Naphthalene, methyl-2-phenyl-Naphthalene, 1-(1-methylpropyl)-Naphthalene, methyl-... 

Older equipment not capable of heating above 210°F may require the use of dye carriers to accelerate the rate of disperse dyeing. These carriers are emulsions of organic materials, (e.g., biphenyl, ortho phenyl phenol, trichlorobenzene, methyl naphthalene, methyl cresotinate, etc). Many of the ester-type carrier materials are by-products from fiber manufacturing. These carrier materials are rarely used in modem dyeing operations, having been eliminated due to their water and air pollution potential, safety hazard, and cost. 

Naphthalene, methyl naphthalenes C. helgolandicuf Whole body HG — 20-191" (BPH) Walters et al. (1976b)... 

Benzene Toluene Xylene Tar acids Tar bases Solvent Naphtha Tar acids Tar bases Naphthalene Methyl-naphthalene Acenapthene Fluorene Diphenylene oxide Phenathracene Anthracene Carbazole Chrysene Fluoranthene Pyrene... 

Sensitized irradiation of (398) below — 30 °C gave only (399) photo-isomerization occurs at higher temperatures, and the formal ( 2 + 2 -l- 2) process probably involves biradical intermediates. Singlet rearrangements appear to be involved in the photochemical conversion of (400 both syn and anfi-isomers) in methanol into naphthalene, methyl 1-naphthylacetate, and 7-carbomethoxy-2,3-benzonorcaradiene (the major product). The anti-chloroketone (401), but not its sy -isomer, likewise underwent photorearrangement to the norcarene derivative, thus illustrating the stereospecificity. 

Some further evidence on the nature of the third emitting species M has been obtained from studies on 1-vinyl naphthalene-methyl aciylate copolymers and an as yet unreported temperature study. Rate-constants obtained from the more flexible acrylate copdiymers obtained by an analy analogous to that described above are given in Table 6. It is of interest that rate parameters for the different copolymers which are internal deactivation rates of monomer (Icm) and excimer (ku) agree well. Moreover rate parameters which might be expected to depend significantly on the flexibility of the polynKr chains show the anticipated dependence, in that akoM > and koM are much greater in the more flexible acrylate copolymers, than in the methacrylate polymers. 

Naphthalene, 2-ethyl-Naphthalene, heptaehloro-Naphthalene, hexaehloro-Naphthalene, methyl-Naphthalene, 1-methyI-... 

Southworth etaL (1978) reported that elimination rates in the cladoceran Daphnia pulex increased in the order perylene>benz[a]anthracene= methylanthracene > pyrene > phenanthrene > anthracene > naphthalene. Hence, naphthalene often occurs in relatively low concentrations in natural invertebrate populations. Anderson etal. (1976) demonstrated that methyl-derivatives of naphthalene were retained in invertebrates longer than the parent compound owing to a decrease in solubility and rate of volatilization. Varanasi and Malins (1977) reported bioconcentration factors of 2, 8, 17, and 27 for clams Rangia cuneata exposed to naphthalene, methyl-naphthalene, dimethylnaphthalene, and trimethylnaphthalene, respectively. 

Ihe procedure has been applied to the copolymer series 1-vinyl-naphthalene-methyl methacrylate [17], 1-vinylnaphthalene-methyl acrylate [71], acenaphthylene-methyl methacrylate [26] and styrene-methyl methacrylate [72]. The consistency of the data derived from alternative extrapolations are good as exemplified for the 1-vinylnaphthalene-methyl methacrylate copolymer series in Table (III)... 

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