Phenoxy chemical structure

Oxidation reactions occur on several sites of the acid and alcohol moieties, depending on the chemical structures. For example, the trans methyl of the isobutenyl group in chrysanthemates is preferentially oxidized over the cis methyl group in rats, and the 4 -position of the phenoxy ring is oxidized to a larger extent as compared with other positions [8] (Fig. 1). 

A poly(arylene ether phenylquinoxaline) of structure 14 was prepared by the aluminum chloride catalyzed reaction of 6,6 -bis[2-(4-phenoxyphenyl)-3-phenylquinoxaline] and isophthaloyl chloride in 1,2-dichloroethane [51]. The polymer had an inherent viscosity of 1.29 dL/g and a Tg of 224 °C. A polymer of the same chemical structure was prepared from the reaction of 3,3, 4,4 -tetraaminobiphenyl with l,3-bis(phenylglyoxalyl-4-phenoxy-4 -benzoyl)-benzene that gave a Tg of 239 °C [16], significantly higher than that prepared by the electrophilic route. In addition, a polymer of the same chemical structure (third polymer in Table 3) prepared via nucleophilic substitution exhibited a Tg of 240 °C. 

Numerous studies on the metabolism of 2,1t-dichlorophenoxy-acetic acid (2,1+-D) and related herbicides in animals have shown that these chemicals are absorbed and distributed rapidly in the body, and are excreted, undegraded, relatively quantitatively in the urine within a week after administration (M Pharmacokinetic studies with 2,1+,5-T in rats and dogs (5.) and in humans (6J supported these findings, and demonstrated that rates of clearance from plasma and elimination in urine depend on dosage level, animal species, and chemical structure of the phenoxy acid being studied ( + ). Corresponding chlorinated phenol metabolites were detected only in ruminants (M or in trace amounts in urine of rats fed very high doses of phenoxy herbicides (7.) ... 

D and 2,4.5-T are chlorinated phenoxy compounds of the general chemical structure ... 

The emulsifying properties of these polymeric surfactants demonstrate that the chemical structure influences the kinetic behaviour of interfacial tension reduction. An increase of sulfopropyl moieties reduces the interfacial tension slower while an increase in 2-hydroxy-3-phenoxy propyl moieties reduces the interfacial tension faster. The ionic strength of the emulsion appears to increase the rate of tension reduction. The average droplet size of oil-in-water emulsions in presence of previously dissolved 2-hydroxy-3-phenoxy propyl sulfopropyl dextran is around 180 nm immediately after preparation and increases with time. The presence of ionic moieties appeared to facilitate emulsification at low polymer concentrations due to electrostatic repulsions between the oil droplets [229]. 

Another approach in generating molecular insulating layers without the need of chemical conversion after deposition is the use of preliminarily modified molecules which can form dense self-assembled monolayers. To create dense self-assembled monolayers with sufficient robustness and insulating properties, a modified alkyltrichlorosilane with an aromatic end-group (18-phenoxyoctadecyl)tri-chlorosilane (PhO-OTS chemical structure Fig. 6.15a) was synthesized and tested [50]. The SAMs were created in a one-step process from vapor phase or solution. On self-assembly on a natively oxidized silicon surface the n-n interaction between the phenoxy end-groups of adjacent molecules creates an intermolecular top-link, leading to a more closely packed surface compared to monolayer than when linear end groups are used. 

The phenoxy resin has a chemical structure similar to that of epoxy resin however, the phenoxy is a high-molecular-weight thermoplastic polymer, which needs no further conversion and has an infinite shelf life. Since the phenoxies are strongly polar polyethers, they... 

FIG. 4.6 Chemical structures of poly-(5-(2-(4-(4-((decyloxy)phenyl)azo)phenoxy)ethyl)-L-glutamate), denoted by P2.10, and poly-(5-(2-(4-(4-((hexylphenylazo)phenoxy)ethyl)-L-glutamate) and poly-(5-(6-(4-(4-((hexylphenylazo)phenoxy)ethyl)-L-glutamate), denoted by and P4 4, respectively. 

Synonyms 2-(p-Butyl phenoxy)-l-methylethyl-2-chloroethylsulfite 2-(p-Butyl phenoxy) isopropyl-2-chloroethyl sulfite Aracide Aramit Aratron Ortho-mite Chemical Structure ... 

A polymer having the bisphenol-A backbone structure is called a phenoxy resin. Its chemical structure is as follows ... 

From the point of view of chemical structure, the common characteristic of hormone-type phenoxyalkanoic acids is a substituted phenoxy radical, to which a low carbon number fatty acid is attached. 

Since the recognition of the auxin action of phenoxy acids extensive research has been undertaken to elucidate the relationships between the biological activity and chemical structure of this group of compounds (Audus, 1953 Fawcett et al., 1956 Wain, 1958 Fawcett et al., 1959 1960 Melnikov, 1971 Wain, 1975). 

However, most of these processes and the whys of the actions depending on chemical structure are still unknown. Thus, structure-activity relationships can be established for phenoxy compounds only in synthesis laboratories by the comparison of activity measurements of compounds in vitro and in vivo, prepared in series, on the basis of structural analogies. 

Effect of chemical structure on the degradation of phenoxy compounds in soil suspensions in days required for ring cleavage (Alexander, 1972)... 

Trichlorophenoxyethanol, having a chemical structure closely related to that of the phenoxy compound just mentioned, can undergo similar chemical and biochemical reactions. 

This full IPN combines the network of an NLO active epoxy-based polymer and the network of an NLO active phenoxy-silicon polymer. l The epoxy-based NLO network is prepared from the epoxy prepolymer (BPAZO) based on the diglycidyl ether of bisphenol A and 4-(4 -nitrophenylazo)aniline functionalized with crosslinkable acryloyl groups. The second NLO network of a phenoxy-silicon polymer is based on an alkoxysilane dye (ASD) of (3-glycidoxypropyl)trimethoxysilane and 4(4 -nitrophenylazo)aniline, and the multifunctional phenoxyl molecule 1,1,1- tris(4-hydroxyphenyl)ethane (THPE).22 Figure 4 shows the chemical structures of BPAZO, ASD, and THPE. Each network can be formed... 

At first,we studied the effect of the chemical structure of polymer chain on the stability of liquid crystalline state.The liquid crystalline state of polyether-esters derived from substituted hydroquinone and substituted 1,2-bis(phenoxy) ethane-4,4 -dicarboxylic acid could be controled by the... 

The chemical structures of sulfonated poly(4-phenoxybenzoyl-l,4-phenyl-ene) (S-PPBP) (1), poly(p-xylylene) (S-PPX) (2), poly(phenylene sulfide) (S-PPS) (3), poly(phenylene oxide) (S-PPO) (4), poly(ether ether ketone) (S-PEEK) (5), poly(ether ether sulfone) (S-PEES) (6), arylsulfonated poly(ben-zimidazole) (S-PBl) (7) sulfonated polyphenylquinoxiiline (S-PPQ) (8) and sulfonated phenoxy polyperyleneimide (PSPPI) (9) are shown below. ACPs are sulfonated using common sulfonating agents [82-85]. In particular, PEEK can be sulfonated in concentrated sulfuric acid [50], chlorosulfonic acid [86], SO3 (either pure or as a mixture) [53,65,86,87], a mixture of methanesulfonic acid with concentrated sulfuric acid [88] and acetyl sulfate [89,90]. 

Other Names L 7545 Lyso Sensor DND 160 LysoSensor Yellow/Blue DND 160 PDMPO CA Index Name Acetamide, N-[2-(dimethylamino)ethyl]-2-[4-[5-(4-pyridinyl)-2-oxazolyl]phenoxy]-CAS Registry Number 231632-18-1 Merck Index Number Not listed Chemical Structure... 

Chemical Name 1 -14-(2-Methoxyethyl)phenoxy] -3-1(1 -methylethyDamino] -2-propanol Common Name -Structural Formula ... 

Chemical Name 1 -([4-[1 -(Hydroxyimino)ethyll phenoxy] acetyl] piperidine Common Name N-(p-1 -NitrosoethyOphenoxyacetylpiperidine, pifoxime Structural Formula /--- ... 

Rayama, A., Rinoshita-Nagaoka, J., Rawano, H., Rameda, S. and Mukuriya, M. (1998) Cycloauration of 2-substituted pyridine derivatives. Synthesis, structure and reactivity of srx-membered cycloaurated complexes of 2-anilino-, 2-phenoxy- and 2-(phenylsulfanyl)-pyridine. Journal of the Chemical Society Dalton Transactions, (24), 4095. 

Fig. 24 Calculated structures of cationic phenoxy-amine complexes in the absence of 1-hexene (a), in the presence of 1-hexene (1-hexene-coordinated state) (b), and for transition state (c) (polymer chain model methyl group). Reproduced with permission from Saito et al. [27]. Copyright 2006, American Chemical Society...

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