4- Chlorophenyl-2,4,5-trichlorophenyl

Thus 4-chlorophenyl 2,4,5-trichlorophenyl ether (48, Scheme 7) produced 4% of a mixture of the dibenzofurans 49 and 50. Only in the case of 2,3,4-trichlorophenyl 2,3,4,5,6-pentai hlorophenyl ether was production of dibenzofurans by formal loss of o,o -chlorine detected. Neither product was identified, but one is presumably the expected product, 1,2,3,4,8,9-hexachloro-dibenzofuran, and the other must be due to a rearrangement. Chlorination of diphenyl ether in the gas phase is unusual. At 300°C the major product is 4-chlorophenyl phenyl ether, as in the liquid phase, but as the temperature is increased (400-500°C), the amount of 4-chlorophenyl phenyl ether decreases at the expense of 3-chlorophenyl phenyl ether, and dibenzofuran is also produced. ... 

Chlorophenyl-2,4,5-trichlorophenyl azosulfide (chlorfensulfide, 19), devel-op>ed bv Ishii et al. (1961), can be considered as a structural transition from nitrogen-containing compounds to sulfur-containing products. It is obtained by the reaction of 2,4,5-trichlorobenzenediazonium chloride with 4-chlorothiophenol ... 

Chlorophenyl 2,4,5-trichlorophenyl sulfone p-Chlorophenyl-2,4,5-trichlorophenyl sulfone. See Tetradifon... 

Synonyms 4-Chlorophenyl 2,4,5-trichlorophenyl sulfone p-Chlorophenyl-2,4,5-trichlorophenyl sulfone Sulfone-2,4,4, 5-tetrachlorodiphenyl 2,4,4, 5-Tetrachlorodiphenyl sulfone 1,2,4-Trichloro-5-((4-chlorophenyl) sulfonyl) benzene Empirical C12H6CI4O2S Formula CI3C6H2SO2C6H4CI Properties Wh. cryst. powd. sol. in chloroform, aromatic hydrocarbons insol. in water m.w. 356.06 m.p. 147 C... 

Snyder et al. [94] compared supercritical extraction with classical sonication and Soxhlet extraction for the extraction of selected organophosphorus insecticides from soil. Samples extracted with supercritical carbon dioxide modified with 3% methanol at 350atm and 50°C gave a =85% recovery of Diazinon (diethyl-2-isopropyl-6-methyl-4-pyrimidinyl phosphorothiodate or 0,0 diethyl-0-(2-isopropyl-6-methyl-4-pyrimidyl) phosphorothioate). Ronnel (or Fenchlorphos) 0,0-dimethyl-0-2,4,5 trichlorophenol phosphorothiodate), Parathion ethyl (diethyl-p-nitrophenyl (phosphorothioate), Tetrachlorovinphos (trans,-2-chloro-l-(2,4,5 trichlorophenyl) vinyl (chlorophenyl-O-methylphenyl phosphorothioate) and Methiadathion. Supercritical fluid extraction with methanol modified carbon dioxide has been applied to the determination of organophosphorus insecticides in soil [260]. 

Chemicals Used. Chemicals used in this study were technical grade products or better, dissolved in xylene with 5% emulsifying agent. The chemicals used included an oil soluble red dye, Dino-seb (2-sec-butyl-4,6 dinitrophenol), pentachlorophenol (PCP), Isopropyl N-(3-chlorophenyl) carbamate (CIPC or Chlorpropham), Iso-octyl 2,4,5- trichlorophenoxy acetate (2,4,5-T), chlorpyrifos (0, 0-diethyl 0-(3,4,6-trichloro 2-pyridyl) - phosphorothioate), and Ronnel (0-dimethyl 0-2, 4,5-trichlorophenyl) phosphorothioate) for application as a spray. The emulsifiable concentrate was diluted in water comparable to 50 gallons of spray to contain the following amounts respectively 2 lbs. for chloropryifos 4 lbs. for 2,4,5-T 3 lbs. CIPC and 2 lbs. for PCP. 

SYNS AKARITOX AREDION 4-CHLOROPHEN-YL-2,4,5-TRICHLOROPHENYL SULFONE p-CHLOROPHENYL-2,4,5-TRICHLOROPHEN YL SULPHONE DUPHAR ENT 23,737 EMC 5488 MITION NIA 5488 POLACARITOX ROZTOZOL SULF0NE-2,4,4, 5-TETRACHL0R0DIPHENYLD TEDION TEDION V-18 2,4,4, 5-TETRACHLOOR-DIFENYI SULFON PUTCH) 2,4,4, 5-TETRACHLOR-DIPHENYL-SULFON (GERMAN) 2,4,4, 5-TETRACHLO-RODIPHENYL SULFONE 2,4,5,4 -TETRACHLORO-DIPHENYLSULPHONE 2,4,4, 5-TETRACLORO-DIFENIL-SOLFONE (ITALIAN) TETRADICHLONE TETRADIFON TETRADIPHON TETRAFIDON l,2,4-TRICHLORO-5-((4-CHLOROPHENYL)SULFONYL)-BENZENE V-18... 

Tacticity determination of vinyl polymer by 1H NMR spectroscopy was first achieved for PMMA by Nishioka169 and Bovey.170 13C NMR chemical shifts of carbons in PMMA show higher sensitivities to longer stereosequences.163 171 173 The carbonyl carbons in many polymethacrylates exhibit a splitting pattern similar to that in PMMA. However, a recent report on 13C NMR spectra of polymers of various chlorophenyl methacrylates indicates that the number and positions of the chloro substituent strongly affect the spectral patterns, and the carbonyl carbon signal of poly(2,4,6-trichlorophenyl methacrylate) does not show a splitting due to tacticity.174... 

The Chapman rearrangement provides an elegant synthesis of unsymmetrical diarylamines that are otherwise difficult of access. When aryl JV-arylbenz-imidoates are heated, the O-aryl group migrates to nitrogen while the double bond moves from the N=C to the C=0 position. For example, 2,4,6-tri-chlorophenyl iV-(o-chlorophenyl)benzimidoate is converted quantitatively into A-(0-chlorophenyl)-jV-(2,4,6-trichlorophenyl)benzamide when heated for... 

Trichlorophenyl analogue gives identical spectrum. o-Chlorophenyl analogue gives almost identical spectrum. ... 

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