Bis- 4-ethoxy-phenyl

Bis[4-methylphenyl] ditellurium, bis[4-methoxyphenyl] ditellurium, and bis[4-ethoxy-phenyl] ditellurium, but not diphenyl or bis[2-naphthyl] ditcllurium, reacted with 2-(phenyliodonio)-benzoates producing compounds with two vicinal aryltelluro substituents in the aromatic ring. The reactions are postulated to proceed via the thermally generated singlet benzyne and concerted addition of the diaryl ditellurium compounds. 

Bis[cyclopentadienyldicarbonyliron] and diaryl ditelluriums in refluxing benzene reacted to initinally form cyclopentadienyidicarbonylarenetellurolatoiron compounds. On prolonged heating, these compounds dimerized with loss of a carbonyl ligand . The dinuclear complexes exist in two isomeric forms. The crystals of the 4-ethoxy phenyl derivative were separated by hand into the two isomers . 

Methyl (2.2-diphenyl-2-methoxy-ethyl)- 2089 C H 0 Cyclopropenylium Bis-[4-methyl-phenyl]-ethoxy- 3101... 

Various workers have studied acrylate copolymers [23-25]. Thus, Pointeck and coworkers [24] examined the linking between two interpenetrating polymer networks (PE/polymeric acrylate) caused by radiation. Zhang and co-workers [25] studied the thermal decomposition and flammability of three polyacrylates based on bisphenol A, 1,1-dichloro 2,2-bis(4-hydroxy phenyl)ethylene and 4,4 -dihydroxy-3-ethoxy benzylidenoacetophenone. Techniques used included Py-GC-MS, simultaneous thermal analysis and pyrolysis combustion flow calorimetry. 

Other Names 2,5 -Bi-l/7-benzimidazole, 2 -(4-ethoxy-phenyl)-5-(4-methyl-l -piperazinyl)-, trihydrochloride 2,5 -Bibenzimidazole, 2 -(p-ethoxyphenyl)-5-(4-methyl-1-piperazinyl)-, trihydrochloride 2 -(4-Ethoxyphenyl)-5-(4-methyl-l-piperazinyl)-2,5 -bi-lH-benzimidazole trihydrochloride 2-[2-(4-Ethoxyphenyl)-6-henzimidazo-lyl]-6-( 1 -methyl-4-piperazinyl)benzimidazole trihydrochloride Bisbenzimide HOE 33342 Ho 342 Hoechst 33342 Hoechst 33342 trihydrochloride NSC 334072... 

The majority of resins are composed of two dimethacrylate monomers, 2,2 -bis [4(2-hydroxy-3-methacryloyloxypropyloxy)phenyl] propane (Bis-GMA) and triethylene glycol dimethacrylate (TEGDMA) [22-28]. Typically, TEGDMA or other methacrylate monomers are added as viscosity modifiers to Bis-GMA to make the solution less viscous and more appropriate for clinical use. These diluents also allow for better distribution of the components during manufacture of these composite systems. Another common monomer used to make dental composites, especially those manufactured in Europe, is urethane dimethacrylate [24,29, 30], Ethoxy bisphenol A dimethacrylate is another modification of the Bis-GMA monomer that can be used to make a more hydrophobic polymer that would better withstand the wet oral environment. Other diluents include low viscosity diacrylates and dimethacrylates. Table 1 lists some of these monomers [31-37]. 

Sulfurane(IV) Bis-[4-fluoro-plienyll-bis-[l-phenyl-2.2.2-tiifluoro-1 -trifluoromelhyl-ethoxy]- El la. 667 (Ar2S + R-OH)... 

HsQ,-P(OC2H5)i U RiickfluB 1,2-Bis- [ethoxy-phenyl-phos-phoryl]-hexafluor-cyclopenten 34 174-176 0,4 (0,05) 525... 

Bis-[diphenoxy-thiopbosphoryl]- E2, 710, 723, 726 Bis- diphenyl-thiophosphinyl]- E2, 266, 274 Bis-[dipropargyloxy-thiophospboryl]- E2, 731 Bis-[ethoxy-metboxy-thiophospboryl]- E2, 731 (4-Cblor-phenyl)-(dietboxy-thiophosphoryl)- E2, 724... 

Benzyl-diethoxy- E2, 134 Benzyl-diisopropyloxy- E2, 134 Benzyl-ethyl-phenyl- -tosylimid E2, 113 Benzyl-methyl-phenyl- -tosylimid E2, 113 Benzyloxy-diphenyl- E2, 17, 18 Benzyloxy-ethoxy-hydroxy- E2, 187 Bis-[2-biphenylyl]- E2, 876 [2,6-bis-(2-tetrahydropyranyloxy-methyl)-phenyl]-Bis-[4-brom-anilino]-phenyl- E2, 416 Bis-[2-brom-ethoxy]-(2-brom-ethyl)- E2, 196 Bis-[butylthio]-ethyi- E2, 79, 408 Bis-[2-chlor-cthoxy]-butyl- E2, 196 Bis-[2-chlor-ethoxy]-(2-chlor-ethyl)- E2, 196 Bis-[2-chlor-ethoxy]-methyl- E2, 196 Bis- 2-chlor-ethoxy]-phenyl- E2, 196, 197, 202 Bis- 2-ehlor-ethoxy]-(2-phcnyl-vinyl)- E2, 196 Bis-(2-ehlor-ethoxy]-vinyl- E2, 196 Bis-j 2-chlor-ethyl]-methyl- E2, 205 Bis-[chlormethyl]-dodecyl- E2, 22 Bis-12-cyan-ethyl]- E2, 223 Bis- diethylamino]-butyl- E2, 486 Bis-[ l-cthinyl-butyl]-phenyl- E2, 197 Bis-[ethoxycarbonyl-methyl]-chlor- E2, 251 Bis-[ethylthio]-ethyl- E2, 408 Bis-[4-methoxy-aniliiio]-phenyl- E2, 416 Bis-[4-methyl-phenylJ-phenyl- K2, 105 Bis- 4-methyl-phcnyl]-phenyl- -phenylsulfonvlimid E2, 105... 

AODCST, 2-[4-bis(2-methoxyethyl)amino]benzylidene malononitrile PTPDac-BA2, copolymer, 65% wt N-(4-acryloyloxymethylphenyl)-N -phenyl-N,N -bis(4-methylphenyl)-[ 1,1 -biphenyl]-4,4 -diamine, 35% wt A-butylacetate DOP, dioctyl phthalate DRl-DCTA, 4,4 -di(carbazol-cl-yl)-4"-(2- N-ethyl-N-[4-(4-nitrophenyldzo)phenyl]amine ethoxy)-triphenylamine other abbreviations are defined in the text and Figures, quantum effieieney of mobile charge photogeneration has been estimated where necessary, °a relative static dielectric constant of 3 and a linear electro-optic response have been assumed. 

Fluorination with elemental fluorine diluted 1 20 with nitrogen was used to prepare pentqfluorophenyl tellurium trifluoride from bis[pentafluorophenyl] ditellurium at — 60° with fluorotrichloromethane as the reaction medium. The yield in this reaction was 80%. 4-M ethoxy phenyl tellurium trifluoride was obtained by electrochemical oxidation of the diaryl ditellurium in 0.5 M hydrofluoric acid at platinum electrodes. Bis[pentafluoroethyl] ditellurium and chlorine fluoride (1 6) reacted at — 78° to give pentafluoroethyl tellurium trifluoride, a white solid melting at 95° The same compound was obtained with xenon difluoride as the fluorinating agent and melted at 143° . ... 

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