N-difluorobenzene

Bis(l,8-naphthyridine)tetracarbonyldirhodium(I) perchlorate, 3785 Bis(l,n-difluorobenzene)chromium(0) isomers, 3455 Bis(2-nitratoethyl)nitric amide, 1597 Bis(4-nitrobenzenediazo) sulfide, 3461a /,/-Bis(4-nitrobenzoylperoxy)-4-chlorophenyliodine, 3783 1,1 -Bis(4-nitrobenzoylperoxy)cyclohexane, 3794 /,/-Bis(4-nitrobenzoylperoxy)-2-methoxyphenyliodine, 3813 /,/-Bis(4-nitrobenzoylperoxy)phenyliodine, 3789... 

Bis(l,n-difluorobenzene)chromium(0) isomers, 3455 Bis(fluorobenzene)chromium(0), 3470 Bis(fluorobenzene)vanadium(0), 3471... 

Many of these attachment reactions are also diffusion-controlled in other solvents of low electron mobility like, for example, n-hexane. It has been suggested that this is the case for all solvents for which 1 cm /Vs [118]. For this to be true, the rate constant k should scale as the mobility. For hexane, the rate constants for attachment to solutes like biphenyl, naphthalene, and difluorobenzene are close to 1 x 10 sec or one-third the value in cyclohexane. The mobility in -hexane is approximately one-third that in cyclohexane [2] thus k scales with fijj for these two solvents. 

In further studies [16], using a group of new electrolytes, R4NF mHF (where R=CH3, C2H5, n-C3H7, and m >3.5), said to have beneficial properties in terms of viscosity, electrolytic conductivity, and electrochemical stability, the same workers have published a series of papers in which they have studied the electrofluorination of benzene, fluorobenzene, and 1,4-difluorobenzene, (Part I) [16], at high current densities, and high current efficiencies without any film formation at the anode. 

Dinitrodifluorobenzene, CgH2F2(N02)2 mw 204.10, N 13.42%. Only one isomer is described in the literature 4.6-Dinitro-l,3-difluorohemene (DNDFB) or 2,4-Dinitro-l,3-difluorobenzene (DNFFB) (called 4.6-Difluor-1.3-dinitro-benzol in Get), prisms (from ale), mp 73-75 readily sol in hot ale less sol in cold ale can be prepd by nitrating either 1,3-difluotobenzene or 1-nitro-2,4 di fluoro benzene with mixed acids (Ref 1) or by other methods (See Refs)... 

Difluorobenzene Diazooxide. CgH2F2NOQt a compd not found in Beil or in CA thru 1961, may be considered the parent compd of its nitro derivs, although not used to prep them 3,6-Dif uoro-2-nitro-l-diazo-4-oxide ( ), C(5HF2N303 mw 201.09, N 20-90% ... 

The advantage of a fluoride leaving group was clear in reaction of a hydroxy-carbamate anion with (fluorobenzene)FeCp complex, where the yield was 72% for F and 41% for Cl [79]. The (l,2-difluorobenzene)FeCp complex underwent smooth double substitution with phenethyl amine, whereas a dichloro complex led to monosubstitution. Replacement of a nitro group in q -nitrobenzene-FeCp" is possible with O, S, and N-nucleophiles [70,80,81]. The nitroarene complexes, which are not known in the Cr(CO)3 series, are prepared by oxidation of the corresponding aniline complexes. 

An ethereal soln. of 0.2 mole l-bromo-2,4-difluorobenzene added during 48 min. at —72 to —67° with vigorous stirring under Ng to 0.2 mole 0.9 N ethereal... 

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