Dinitrogen tetrafluoride

12 Dinitrogen Tetrafluoride, N2F4 Other name Tetrafluorohydrazine CAS Registry Humber [10036-47-2] 

Studnev, Reactions of Tetrafluorohydrazine with Organic Compounds, Izv. Akad. Nauk SSSR Ser. Khim. 1982 1812/20 Bull. Acad. Sci. USSR Div. Chem. Sci. 31 [1982] 1609/16. 

Studnev, L. D. Kuznetsova, Metody Sinteza Organicheskikh Soedinenii so Svyaz yu N-F (Methods of Synthesis of Organic Compounds with N-F Bonds), in I. L. Knunyants, N. N. Mel nikova, V. D. Simonova, Reaktsii i Metody Issledovaniya Organicheskikh Soedinenii, Vol. 24, Moscow 1976, pp. 7/466. 

Gas-phase Kinetics of the Difluoroamino Radical, Chem. Soc. Rev. 3 [1974] 17/39. 

Trotman-Dickenson, P. Cadman, A. J. White, The Kinetics of the Organic Reactions of the Difluoroamino Radical, Anales Asoc. Quim. Arg. 59 [1971] 163/8. 

When compared with other halides of nitrogen, nitrogen trifluoride and dinitrogen tetrafluoride are comparatively stable and easy to handle. For this reason 

Herron and Dibeler142 and Kennedy and Colburn143 have calculated the bond dissociation energies of N2F4 and NF3. Their results are summarised in Table 9. 

ESTIMATED BOND DISSOCIATION ENTHALPIES OF NITROGEN-FLUORINE COMPOUNDS 

In contrast to the situation in NH3, the first N-F bond in NF3 is broken more easily than the second and third. The average strength of the latter two bonds is 71 kcal.mole-1. Within experimental error this is the same as the average N-F bond energy in N2F4. Since Z NFj F is only 57.1 +2.5 kcal, the reaction 

Consequently, NF2 radicals in N2F4 are chemically unreactive, and the equilibrium 

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Dinitrogen tetrafluoride, N2F4, is the fluorine analogue of hydrazine and exists in both the staggered (trans) C2h and gauche C2 conformations... 

Dinitrogen tetrafluoride, N2F4 (b.p. — 73 °C), can be prepared by the reaction of NF3 with copper. The N2F4 molecule undergoes dissociation in the gas phase to produce -NF2 radicals. 

The decomposition of dinitrogen tetrafluoride in shock-heated nitrogen has also been investigated146. At 400 °C and a total concentration of 7 x 10 2 mole. I-1 the apparent first-order rate coefficient, kss,... 

Tetrafluoroammonium salts hydrolyze in water, regenerating NF3. Nitrogen trifluoride reacts with several metals at high temperatures. When heated with copper, it yields copper(ll) fluoride and dinitrogen tetrafluoride ... 

Was obtd during the reaction of nitrogen trifiuoride (NF3) with As at 250—300° to produce dinitrogen tetrafluoride (N2F4)... 

Consider the trans configuration of dinitrogen tetrafluoride. If we perform a C2 operation followed by a ah operation, we will have a successful S2 operation. Note, however, that the same result could have been obtained by an inversion operation ... 

Spears, L. G., Hackerman, N. Analysis of fluorine, hydrogen fluoride, nitrogen trifluoride, trans dinitrogen difluoride and dinitrogen tetrafluoride mixture by gas chromatography. J. Gas Chromatog. 6, 392 (1968). 

Sulfur chloride pentafluoride can be reduced photochemi-cally to the very toxic S2F10 and can be o.xidized photo-chemically to a mixture of SFsOSFs and SFsOOSFg. With olefins, it reacts to form a variety of organic sulfur pentafluorides. The ultraviolet irradiation of a mixture of sulfur chloride pentafluoride and dinitrogen tetrafluoride yields SFgNFj. ... 

The only known symmetrical molecules of tlie type a2N-Na2 with single N-N bonds are those of hydrazine, N2H4, and dinitrogen tetrafluoride, N2F4. In some molecules in which O atoms are attached to N as, for example, nitramine, (a),... 

Consider the following equilibrium process between dinitrogen tetrafluoride (N2F4) and nitrogen difluoride (NF2) ... 

ETHYL NITRILE (75-05-8) CjHjN H3C-C=N Flammable liquid. Forms explosive mixture with air [explosion limits in air (vol %) 3.0 to 16.0 flash point 42°F/6°C cc autoignition temp 975°F/524°C Fire Rating 3]. Contact with steam forms cyanide gas. Violent reaction with strong oxidizers reducing agents nitrogen-fluorine confounds (e.g., dinitrogen tetrafluoride). Contact with aqueous acids or bases... 

Dihalides of fixed cis geometry are obviously better suited to the synthesis 5-azoniaspiro[4,4]nona-2,7-diene chloride (81) is obtained in 72% yield from the (Z) dichloride (Equation (24)) <60JOC2230>. There is one example of the cyclization of a tetraalkylammonium perchlorate to the spiro compound (82) by dinitrogen tetrafluoride (Equation (25)) <67USP3346589>. 

CF-CFa O. Dinitrogen tetrafluoride adds 1,4 to both perfluoro- and 1,1,4,4-tetrafluorobuta-1,3-diene, and the product from the latter, FjN CFj CH CH CFa NF, is oxidized by KMnOi in the presence of aqueous KjCOj to F,NCFj-CH(OH)CH(OH)CFjNFa. i... 

The synthesis of dinitrogen tetrafluoride in 1958 was the beginning of a period where numerous previously unknown substances were synthesized. The preparations, properties, and reactions of N2F4 have been intensively studied. The most remarkable property is its reversible dissociation into NF2 radicals, N2F4 2NF2, which explains many of the chemical properties of N2F4. Due to the relative stability of the NF2 radical, its molecular properties and spectra are well investigated. 

The systematic names of the binary fluorine-nitrogen compounds are only used for a few substances, whereas the organic substitutional type of nomenclature is widely used. Thus, NF3 is called by its systematic name nitrogen trifluoride (and not trifluoroamine), but N2F4 is generally named tetrafluorohydrazine instead of dinitrogen tetrafluoride and N3F fluorine azide instead of trinitrogen fluoride. Subsequently, there are sometimes up to three names for... 

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