P-Phenylenebis

C3NO 0 — N — — 2,2 -p-Phenylenebis(5-phenyloxazole) 2-(4-pyridyl)oxazole 2,4-dimethyl-5-(p-nitrophenyl)oxazole 2-oxazolidinone ... 

Oxazole, 2,2 -p-phenylenebis(5-phenyl-X-ray diffraction, 6, 180 Oxazole, 5-phenyl-2-p-tolyl-reactions, 6, 215 Oxazole, tetrahydro-ring cleavage, 5, 80 Oxazole, C-tolyl-reactions... 

Phosphine, methyl-n-propylphenyl-rhodium complexes asymmetric hydrogenation, 6,250 Phosphine, neomenthyldiphenyl-rhodium complexes asymmetric hydrogenation, 6,250 Phosphine, phenyl-, 2,992 Phosphine, o-phenylenebis(dimethyl-, 2,993 Phosphine, p-phenylenebis(diphenyl-, 2,993 Phosphine, seleno-metal complexes, 2,664 bidentatc, 2, 664 Phosphine, triaryl-photographic stabilizer, 6,103 Phosphine, tributyl-, 2, 992 oxide... 

Catalyst Study. Equivalent amounts of p-phenylenebis(4,4-dimethyl-2-oxazol1n-5-one ) (2) and Jeffamine D-2000 (polyoxypropylenediamine from Texaco Chemical Co., amine equiv. weight 1023) were mixed with 5 mole % of the desired catalyst. The stirred mixture was heated at 240°C under argon for 30 minutes, then an additional 1.5 hours under vacuum (<1 torr) and collected. The amount of cyclization was estimated by 1H-NMR in CDC 13 by comparison of the Integrated intensities of the absorptions due to the gem-dimethyl substituents. These absorptions appeared at 1.39 ppm in the cyclic form and at 1.73 ppm in the open-chain form of the polymer (see Scheme 4). Results are listed in Table I. 

Scheme 3) seems to infer some extra stability similar to that of p-phenylenebis-methylene (8). 

Sodium dithiocarbamates are similarly converted to aryl dithiocarbamates with polymeric aryliodonium bisulfates 20 derived from styrene (Scheme 41) [116]. The high regioselectivity of C-I bond cleavage in 20 is noteworthy, only trace amounts of iodoarenes [Arl] having been detected in occasional cases . Regioselective conversions of p-phenylenebis(phenyliodonium) ditriflate (21) top-phenylenebis(dithiocarbamates) with dithiocarbamate salts have also been reported (Scheme 41) [117]. 

Figure 1 Bond lengths (A) and bond angles (°) for 2,2 -p-phenylenebis(5-phenyloxazole) (39)...

Dielectric response of hydrated p-phenylenebis(squaric acid) 259... 

Fig, 25 Crystal structure of the hydrated crystal of p-phenylenebis(squaric acid) ... 

DIELECTRIC RESPONSE OF HYDRATED p-PHENYLENEBIS(SQUARIC ACID)... 

Variations on the theme of the tetrathiafulvalene structure have been investigated. Thus, the violene radical 156 has been characterized polaro-graphically and by electronic absorption spectra s 157, the phenylog of 154, has been reported the p-phenylenebis(tetrathiafulvalene) 158 gives an ESR spectrum upon oxidation which implies three equivalently coupling protons i.e., it behaves as a monosubstituted 153. ° There have been various attempts to incorporate the tetrathiafulvalene structure into polymeric materials, but with limited success in producing conducting polymers. i- ... 

Interest has also continued in phosphinidene (RP ) chemistry. Evidence from mass spectrometry has led to the conclusion that phenylphosphinidene, PhP , is a stable species in the gas phase.The existence of p-phenylenebi-sphosphinidene (332) has been considered from a theoretical standpoint. " The reactivity of coordinated phosphinidenes has received further study. The first examples of genuine 1,4-additions of the complex PhP=W(CO)5 with 1,3-dienes, giving phospholene complexes, e.g. (333), have been reported. " " Phosphiranes are formed as intermediate species in the reactions of complexed phosphinidenes with chloro-alkenes, which lead ultimately to vinylphosphorus compounds (334), essentially insertion products of the phosphinidene into the... 

Beilstein Handbook Reference) Aceto DIPP Agerite White AgeRite W AI3-14324 Antigene F Antioxidant 123 Antioxidant DNP ASM-DNT 1,4-Benzenediamine, N,N -di-2-naphthalenyl- N,N -Bis-(2-naftyl)-p-fenylendiamin 1,4-Bis(2-naphthylamino)-benzene N,N -Bis((3-naphthyl)-p-phenylenediamine N,N -Bis(2-naphthyl)-p-phenylenediamine BRN 2224419 CCRIS 6026 Oi-(3-naphthyl-p-phenyldi-amine Di-(J-naphthyl-p-phenylenediamine s-Di(P-naphthyl)-p-phenylenediamine N,N -Di-p-naphlhyl-p-phenylene-diamine N,N -Di-2-naphthalenyl-1,4-benz-enediamine N,N -Di-2-naphthyl-p-phenylenediamine Diafen NN DNPD Dnpda Dwu-p-naftylo-p-fenylodwuamina EINECS 202-249-2 Nonox CL NSC 3410 p-Phenylenediamine, N,N -(di-2-naphthyl)- N,N -p-Phenylenebis(2-naphthylamine) Santowhite CL Tisperse MB-2X. Antioxidant, An antidegradant for latex, nitrile rubber, styrene-butadiene and nitrile-butadiene rubber. Solid mp = 224-230° d n 1.22-1.28 insoluble in H2O, EtOH, soluble in organic solvents LDso (rat orl) = 4500 mg/kg. Vanderbilt R. T. Co. Inc. 

Suzuki T, Li Q, Khemani K C, Wudi F and Almarsson O 1992 Synthesis of meta-phenylene-phenylenebis (phenylfulleroids) and p-phenylenebis(phenylfulleroids)—2-pearl selections of pearl necklace polymers J. Am. Chem. Soc. 114 7300-1... 

Other methods to prepare aromatic halo- or dihalo-phosphines are occasionally used. Arylbis(dialkylamino)phosphines have been converted into aryldihalophosphines with dry HCl or HBr, e.g. dichloro(2-methoxy- or 2-dimethylaminophenyl)phosphine (equation 29) the o- and m-phenylenebis(dichlorophosphine)s 20 and 21" and the p-phenylenebis(dichlorophosphine) 22. The c -phenylenebis(dibromophosphine) 23 has been prepared similarly Aryldiazonium tetrafluoroborates with PCI3 give chlorophos-phonium salts, which can be reduced to aryldichlorophosphines (equation 30). Primary and secondary phosphines may be chlorinated with phosgene to give chlorophosphines, e.g. hexamethylenebis[chloro(phenyl)phosphine] (equation 31) and 20 ". ... 

A range of m- and p-phenylenebis[trifluoro(phenyl)silicates] result from the... 

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