Tetrafluorohydrazine or perfluorohydrazine, N2F4, is a colourless, reactive inorganicgas. It is a fluorinated analog of hydrazine. It is a highly hazardous chemical that explodes in the presence of organic materials.
At room temperature N2F4 is mostly associated with only 0.7% in the form of NF2 at 5mm Hg pressure. When the temperature rises to 225 °C, it mostly dissociates with 99% in the form of NF2.[4]
The energy needed to break the N-N bond in N2F4 is 20.8 kcal/mol, with an entropy change of 38.6 eu.[4] For comparison, the dissociation energy of the N-N bond is 14.6 kcal/mol in N2O4, 10.2 kcal/mol in N2O2, and 60 kcal/mol in N2H4. The enthalpy of formation of N2F4 (ΔHf) is 34.421 kJ/mol.[5]
^Jäger, Susanne; von Jouanne, Jörn; Keller-Rudek, Hannelore; Koschel, Dieter; Kuhn, Peter; Merlet, Peter; Rupecht, Sigrid; Vanecek, Hans; Wagner, Joachim (1986). Koschel, Dieter; Kuhn, Peter; Merlet, Peter; Ruprecht, Sigrid; Wagner, Joachim (eds.). F Fluorine: Compounds with Oxygen and Nitrogen. Gmelin Handbook of Inorganic Chemistry. Vol. 4. Berlin: Springer. p. 162. doi:10.1007/978-3-662-06339-2. ISBN978-3-662-06341-5. Retrieved 29 August 2015.
^ abBohn, Robert K.; Bauer, Simon Harvey (February 1967). "An electron diffraction study of the structures of NF2 and N2F4". Inorganic Chemistry. 6 (2): 304–309. doi:10.1021/ic50048a024. molecule dimensions and angles
tetrafluorohydrazine, perfluorohydrazine, n2f4, colourless, reactive, inorganic, fluorinated, analog, hydrazine, highly, hazardous, chemical, that, explodes, presence, organic, materials, namesiupac, name, tetrafluorohydrazineother, names, perfluorohydrazine, . Tetrafluorohydrazine or perfluorohydrazine N2F4 is a colourless reactive inorganic gas It is a fluorinated analog of hydrazine It is a highly hazardous chemical that explodes in the presence of organic materials Tetrafluorohydrazine NamesIUPAC name 1 1 2 2 tetrafluorohydrazineOther names Tetrafluorohydrazine perfluorohydrazine UN 1955IdentifiersCAS Number 10036 47 2 N3D model JSmol Interactive imageChemSpider 23228 YECHA InfoCard 100 030 091PubChem CID 24845UNII RR3J2QP9MG YCompTox Dashboard EPA DTXSID9064922InChI InChI 1S F4N2 c1 5 2 6 3 4 YKey GFADZIUESKAXAK UHFFFAOYSA N YInChI 1 F4N2 c1InChI 1 F4N2 c1 5 2 6 3 4Key GFADZIUESKAXAK UHFFFAOYAXSMILES FN F N F FPropertiesChemical formula N2F4Molar mass 104 01 g mol 1Melting point 164 5 C 264 1 F 108 6 K 1 Boiling point 73 C 99 F 200 K 1 Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa N verify what is Y N Infobox references Tetrafluorohydrazine is manufactured from nitrogen trifluoride using an iron catalyst or iron II fluoride It is used in some chemical syntheses as a precursor or a catalyst Tetrafluorohydrazine was considered for use as a high energy liquid oxidizer in some never flown rocket fuel formulas in 1959 2 Properties EditTetrafluorohydrazine is in equilibrium with its radical monomer nitrogen difluoride 3 N2F4 2 NF2 At room temperature N2F4 is mostly associated with only 0 7 in the form of NF2 at 5mm Hg pressure When the temperature rises to 225 C it mostly dissociates with 99 in the form of NF2 4 The energy needed to break the N N bond in N2F4 is 20 8 kcal mol with an entropy change of 38 6 eu 4 For comparison the dissociation energy of the N N bond is 14 6 kcal mol in N2O4 10 2 kcal mol in N2O2 and 60 kcal mol in N2H4 The enthalpy of formation of N2F4 DHf is 34 421 kJ mol 5 References Edit a b Greenwood Norman N Earnshaw Alan 1997 Chemistry of the Elements 2nd ed Butterworth Heinemann ISBN 978 0 08 037941 8 Tetrafluorohydrazine at DTIC mil archived March 12 2007 Jager Susanne von Jouanne Jorn Keller Rudek Hannelore Koschel Dieter Kuhn Peter Merlet Peter Rupecht Sigrid Vanecek Hans Wagner Joachim 1986 Koschel Dieter Kuhn Peter Merlet Peter Ruprecht Sigrid Wagner Joachim eds F Fluorine Compounds with Oxygen and Nitrogen Gmelin Handbook of Inorganic Chemistry Vol 4 Berlin Springer p 162 doi 10 1007 978 3 662 06339 2 ISBN 978 3 662 06341 5 Retrieved 29 August 2015 a b Bohn Robert K Bauer Simon Harvey February 1967 An electron diffraction study of the structures of NF2 and N2F4 Inorganic Chemistry 6 2 304 309 doi 10 1021 ic50048a024 molecule dimensions and angles Nitrogen difluoride NF2 g www chem msu su Retrieved from https en wikipedia org w index php title Tetrafluorohydrazine amp oldid 1106655323, wikipedia, wiki, book, books, library,
