Nitrosonium tetrafluoroborate
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IUPAC name nitrosonium tetrafluoroborate | |
Other names nitrosyl tetrafluoroborate | |
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ECHA InfoCard | 100.035.148 |
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Properties | |
Chemical formula | BF4NO |
Molar mass | 116.81 g·mol−1 |
Appearance | colourless crystalline solid |
Density | 2.185 g cm−3 |
Melting point | 250 °C (482 °F; 523 K) (sublimes) |
Solubility in water | decomposes |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references |
Nitrosonium tetrafluoroborate, also called nitrosyl tetrafluoroborate, is a chemical compound with the chemical formula NOBF4. This colourless solid is used in organic synthesis as a nitrosating agent.[1]
NOBF4 is the nitrosonium salt of fluoroboric acid, and is composed of a nitrosonium cation, [NO]+, and a tetrafluoroborate anion, [BF4]−.
Reactions
The dominant property of NOBF4 is the oxidizing power and electrophilic character of the nitrosonium cation. It forms colored charge transfer complexes with hexamethylbenzene and with 18-crown-6. The latter, a deep yellow species, provides a means to dissolve NOBF4 in dichloromethane.[2]
Nitrosonium tetrafluoroborate may be used to prepare metal salts of the type [MII(CH3CN)x][BF4]2 (M = Cr, Mn, Fe, Co, Ni, Cu). The nitrosonium cation acts as the oxidizer, itself being reduced to nitric oxide gas:[3]
- M + 2NOBF4 + xCH3CN → [M(CH3CN)x](BF4)2 + 2NO
With ferrocene the ferrocenium tetrafluoroborate is formed.[4]
In its infrared spectrum of this salt, νNO is a strong peak at 2387 cm−1.[5]
References
- ^ "A15806 Nitrosonium tetrafluoroborate, 98%". Alfa Aesar website. Retrieved 2010-09-04.
- ^ Lee, K. Y.; Kuchynka, D. J.; Kochi, Jay K. (1990). "Redox equilibria of the nitrosonium cation and of its nonbonded complexes". Inorganic Chemistry. 29 (21): 4196–4204. doi:10.1021/ic00346a008.
- ^ Heintz, Robert A.; Smith, Jennifer A.; Szalay, Paul S.; Weisgerber, Amy; Dunbar, Kim R. (August 2004). "11. Homoleptic Transition Metal Acetonitrile Cations with Tetrafluoroborate or Trifluoromethanesulfonate Anions". Inorg. Synth. 33: 75–83. doi:10.1002/0471224502.ch2. ISBN 978-0-471-46075-6.
- ^ Roger M. Nielson; George E. McManis; Lance K. Safford; Michael J. Weaver (1989). "Solvent and electrolyte effects on the kinetics of ferrocenium-ferrocene self-exchange. A reevaluation". J. Phys. Chem. 93 (5): 2152. doi:10.1021/j100342a086.
- ^ Sharp, D. W. A.; Thorley, J. (1963). "670. The Infrared Spectrum of the Nitrosonium Ion". Journal of the Chemical Society (Resumed): 3557. doi:10.1039/JR9630003557.
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HBF4 | He | ||||||||||||||||||||
LiBF4 | Be | B | C7H7BF4 [Et3O]BF4 [Me3O]BF4 (FTEDA)BF4 | NOBF4 NO2BF4 NH4BF4 | O | F | Ne | ||||||||||||||
NaBF4 | Mg(BF4)2 | Al | Si | P | S | Cl | Ar | ||||||||||||||
KBF4 | Ca(BF4)2 | Sc | Ti | V | [Cr(MeCN)6](BF4)3 [Cr(MeCN)4](BF4)2 | Mn(BF4)2 | Fe(BF4)2 FeO(BF4)2 [FeCp2]BF4 | Co(BF4)2 | Ni(BF4)2 [Ni(MeCN)6](BF4)2 | Cu(BF4)2 | Zn(BF4)2 | Ga | Ge | As | Se | Br | Kr | ||||
RbBF4 | Sr(BF4)2 | Y | Zr | Nb | [Mo2(MeCN)8](BF4)4 [Mo2(MeCN)10](BF4)4 | [Tc2(MeCN)10](BF4)4 | [Ru(MeCN)6](BF4)2 | [Rh(MeCN)6](BF4)3 [Rh2(MeCN)10](BF4)4 | [Pd(MeCN)4](BF4)2 | AgBF4 | Cd(BF4)2 | In(BF4)3 | Sn(BF4)2 | Sb | Te | (IPy2)BF4 | Xe | ||||
CsBF4 | Ba(BF4)2 | * | Lu | Hf | Ta | W | Re | Os | Ir | Pt(BF4)2 | Au | Hg(BF4)2 | TlBF4 | Pb(BF4)2 | Bi | Po | At | Rn | |||
Fr | Ra | ** | Lr | Rf | Db | Sg | Bh | Hs | Mt | Ds | Rg | Cn | Nh | Fl | Mc | Lv | Ts | Og | |||
* | La | Ce | Pr | Nd | Pm | Sm | Eu | Gd | Tb | Dy | Ho | Er | Tm | Yb | |||||||
** | Ac | Th | Pa | U | Np | Pu | Am | Cm | Bk | Cf | Es | Fm | Md | No |