Diphenyl dichloro methane

Diederich et al. had postulated that the highly reactive iron-oxo species, arising from oxygen transfer from the oxidant to the Fem site [87], should be greatly stabilised by enclosure within a dendritic superstructure. The catalytic potential of the dendrimers 6 a-c was determined in the epoxidation of alkenes [83 a, 88] (1-octene and cyclooctene) and the oxidation of sulphides [83 a] ((methylsulphanyl)benzene and diphenyl sulphide) to sulphoxides - in dichloro-methane with iodosylbenzene as oxidising agent. Compared to the known metal-porphyrin catalysts, 6a-c exhibit only low TON (7 and 28, respectively, for... 

Singlet oxygen, generated by thermal decomposition of triphenyl phosphite ozonide in dichloro-methane, readily reacted at — 10°C with 2,3-diphenylcyclopropenethione to give 2,3-diphenyl-cyclopropenone in 75% yield. ... 

Glycals are suitable precursors for 1,2-trans phenylselenyl azides, and in 1994 two different preparative approaches were reported.3,4,6-Tri-(9-benzyl-2-deoxy-2-(phenylseleno)-(3-D-glucopyranosyl azide (176) and the a-o-mannopyran-osyl azide (177) were prepared by two different methods trimethylsilyl azide + A -phenylselenophthalimide + tetrabutylammonium fluoride in dichloro-methane at room temperature, or sodium azide + phenylselenyl chloride in A, A -dimethylformamide. The physical data of these compounds differ considerably between the two reports and so the results remain somewhat dubious. When D-glucal triacetate 140a was treated with (diacetoxyiodo)benzene and sodium azide in the presence of diphenyl diselenide at room temperature, an... 

PCBs and PCTs are particularly troublesome liquids because of their toxicity and persistence in the environment. They are defined as polychlorinated biphenyls, polychlorinated terphenyls, monomethyl-dibromo-diphenyl metliane, monomethyl-dichloro-diphenyl metliane or monomethyl-tetrachlorodiphenyl methane. With low electrical conductivity and heat resistance they found wide use as dielectric fluids and were formerly used as hydraulic fluids. PCBs have not been made in the UK since 1977 and whilst most new uses for the substance are banned in most countries, around two-thirds of the 1.5 million tonnes manufactured in Europe and the US prior to 1985 still remain in equipment such as transformers. PCTs have been used in the past in a restricted range of specialist industrial applications. 

The isomer 2,4 -dioxy-3,3 -dichloro-diphenyl-(2-pyridyl)-methane is removed by thoroughly washing with 430 ml of 95°C boiling alcohol, obtaining 167 g of isomer-free product (yield 69%). The 3,3 -dichloro-4,4 -dioxy-diphenyl-(2-pyridyl)-methane is a white solid, crystallizing from 95% alcohol MP 212° to 215°C. 

Preparation of 4,4 -Dioxy-Diphenyl-(2-Pyridyl)-Methane 100 g of 3,3 -dichloro-4,4 -dioxy-diphenyl-(2-pyridyl)-methane, obtained as above described, are dissolved in 660 ml of 10% sodium hydroxide and 49 g of Raney-nickel alloy are added to the solution with vigorous stirring, at room temperature and during 4 hours. The mixture is stirred overnight at room temperature, then it is filtered and brought to pH 5 with 10% acetic acid. The precipitate obtained, filtered, washed and dried is then dissolved in 1,500 ml of 95°C boiling alcohol to eliminate the insoluble salts. The residue obtained after the evaporation of the alcoholic solution weighs 74 g (yield 92%). The yield in respect to 2-pyridinaldehyde is 63.5%. 

To a stirred solution of 0.02 mole of an orange-red solution of potassium diphenylmethide in 150 ml of liquid ammonia and 50 ml of dry ethyl ether, prepared from 0.02 mole of KNH2 and 3.36 gm (0.02 mole) of diphenyl-methane, is added 2.5 gm (0.01 mole) of l,l-dichloro-2,2-diphenylethene. The reaction mixture darkens and then a precipitate forms. The reaction mixture is stirred until all the ammonia evaporates to leave a solid. The solid is recrystallized from chloroform-methanol to afford 3.1 gm (90%) of tetraphenylallene, m.p. 164°C. 

Is a 20% dihydroxy-dichloro-diphenyl methane. This emulsion type product is cationic in nature and is compatible with alum-inum/wax type water repellent material. This permits the single bath application of a water repellent and a mildew-proofing agent. EPA 6009-8... 

Dihydroxy-dichloro-diphenyl methane ECCO Eastern Color... 

Scheme 38 Preparation of diphenyl cyanocarbonimidate from dichloro diphe-noxy methane.

Benzene, 1,1 -(diohloromethylene)bis- Benzophenone dichloride Dichloro(diphenyl)methane Dichlorodi-phenyl methane Dichloroditane a,a-Dichlorodi-phenylmethane DPM (halocarbon) EINECS 218-134-5 Methane, dichlorodiphenyl- NSC 37426, A chemical intermediate. Liquid bp = 305" (dec), bp2i = 190° d = 1.235 km = 250 nm (sn 5120, MeOH) soluble in Et20, CeHe, CCI4 Bakelite Corp. 

There is another synthesis of organosilicon halides, not generally applicable, but important in industry because the starting materials are cheap this is the treatment of silicon halides with hydrocarbons at high temperatures. As examples, tetrachlorosilane and benzene in the gas phase at 840° give dichloro(diphenyl)silane 372 tetrachlorosilane and methane in the gas phase give trichloro(methyl)silane at 960° in the presence of an iron catalyst372 and at 500° in the presence of a brick or pumice catalyst.373... 

Methane dichloride Methane-, dichloro-. See Methylene chloride Methane, dicyano-. See Malononitrile Methane, diethoxy-. See Diethoxymethane Methane, diphenyl-. See Diphenylmethane Methanedisulfonic acid, aluminum salt (3 2). See Aluminum methionate p-Methane-2,9-dithiol. See D-Limonene dimercaptan Methane gas CAS 74-82-8... 

Fig. 29. Decrease in concentration of phenolics in activated sludge (Paulus Genth, 1983). (OPP, u-phenyl-phenol PCMC, p-chloro-m-cresol BP, benzyl-phenol CBP, p-chloro- -benzyl-phenol DC, (2,2 -dihydroxy-5,5 dichloro-)diphenyl methane PCMX, / -chloro-m-xylenol PCP, pentachlorophenol.)...

Substance classes Properties — Effectiveness — Applications 5.7.3 2,2 -Dihydroxy-5,5 -dichloro-diphenyl methane — Dichlorophen... 

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