bifluoride KHF sub 2 sub , also called potassium hydrogen fluoride and ammonium bifluoride NH sub ... bifluoride instead. cn date April 2012 Autodissociation of pure HF The bifluoride ion also contributes ... sup sub HF sub References commonscat bifluoride ion reflist Category Anions Category Fluorides fr Bifluorure it Idrogenodifluoruro nl Bifluoride ja zh ... more details
chembox Verifiedfields changed verifiedrevid 470457569 Name Potassium bifluoride ImageFile ImageName IUPACName Potassium bifluoride OtherNames Potassium hydrogen difluoride Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite changed chemspider ChemSpiderID 21241938 InChI 1 F2H.K c1 2 h1H q 1 1 InChIKey NABAXLWFTDYCFT UHFFFAOYAS SMILES K .F F StdInChI Ref stdinchicite changed chemspider StdInChI 1S F2H.K c1 2 h1H q 1 1 StdInChIKey Ref stdinchicite changed chemspider StdInChIKey NABAXLWFTDYCFT UHFFFAOYSA N CASNo Ref cascite changed ?? CASNo 7789 29 9 PubChem 11829350 RTECS TS6650000 Section2 Chembox Properties Formula HF sub 2 sub K MolarMass 78.103 g mol Appearance colourless solid Density 2.37 g cm sup 3 sup Solubility MeltingPt 239 C BoilingPt decomp. Section3 Chembox Structure Coordination CrystalStruct monoclinic Section7 Chembox Hazards ExternalMSDS EUClass Toxic T , Corrosive C RPhrases R25 34 SPhrases S22 26, S37 45 FlashPt non flammable Section8 Chembox Related OtherAnions Potassium fluoride OtherCations Sodium bifluoride, ammonium bifluoride Potassium bifluoride is the inorganic compound with the chemical formula formula KHF sub 2 sub . This colourless salt consists of the potassium cation and the bifluoride HF sub 2 sub sup &minus sup anion. The salt is used in etchant for glass. Sodium bifluoride is related and is also of commercial use as an etchant as well as in cleaning products. ref name Aigueperse Jean Aigueperse, Paul Mollard, Didier Devilliers, Marius Chemla, Robert Faron, Ren e Romano, Jean Pierre Cuer, Fluorine Compounds, Inorganic in Ullmann s Encyclopedia ... of the chemical bond in the bifluoride anion Potassium bifluoride, as its name indicates, contains a bifluoride , or hydrogen difluoride anion HF sub 2 sub sup sup . This centrosymmetric triatomic anion ... bifluoride is prepared by treating potassium carbonate or potassium hydroxide with hydrofluoric ... Ammonium bifluorideBifluorideBifluoride anion References references Potassium compounds Category Inorganic ... more details
sub 4 sub sup sup cation tetrahedral br bifluoride HF sub 2 sub sup sup anion linear CrystalStruct Cubic ... bifluoride OtherCpds ammonium fluoride Ammonium hydrogen fluoride is the inorganic compound with the formula ... contemplated route to hydrofluoric acid . Structure Ammonium bifluoride, as its name indicates, contains a bifluoride , or hydrogen difluoride anion HF sub 2 sub sup sup . This centrosymmetric triatomic ... bifluoride HF sub 2 sub sup sup anions. Production and applications Ammonium bifluoride is a component ... H sub 2 sub O Potassium bifluoride is a related more commonly used etchant. Ammonium bifluoride has ... to give the bifluoride H sub 2 sub SiF sub 6 sub 6 ammonia NH sub 3 sub 2 H sub 2 sub O SiO sub ... bifluoride is converted to the sodium bifluoride, which thermally decomposes to release HF. ref name ... Chemistry, Wiley VCH, Weinheim. DOI 10.1002 14356007.a11 307 ref See also BifluorideBifluoride anion Potassium bifluoride References references A. F. Wells 1984 Structural Inorganic Chemistry , 5th ... more details
Difluorides are chemical compounds with two fluorine atoms per molecule or per formula unit . Metal difluorides are all ionic. The alkaline earth difluorides are all insoluble in water except for beryllium difluoride . Many transition metal fluorides are water soluble though. CaF2 Calcium difluoride is a notable compound. In the form of the mineral fluorite it is the major source of commercial fluorine. It also has an epynomic crystal structure, which is an end member of the spectrum starting from bixbyite and progressing through pyrochlore . The compound has extremely high lattice stability and is thus insoluble in water despite being strongly ionic. List of the difluorides Examples of the difluorides include Metal difluorides Compounds of the form MF sub 2 sub Beryllium difluoride Cadmium difluoride CaF2 Calcium difluoride Cobalt difluoride Lead difluoride Mercury difluoride Nickel difluoride Palladium difluoride Silver difluoride Strontium difluoride Zinc difluoride Metal bifluorides Compounds of the form MF HF potassium bifluoride sodium bifluoride Nonmetal difluorides Krypton difluoride Dinitrogen difluoride Oxygen difluoride Dioxygen difluoride Selenoyl difluoride Sulfur difluoride Disulfur difluoride Thionyl difluoride Radon difluoride Xenon difluoride Organic difluorides Ethanedioyl difluoride Ethylidene difluoride Carbonyl difluoride Carbon dibromide difluoride dibromodifluoromethane Carbon dichloride difluoride dichlorodifluormethane Methyl difluoride Methylphosphonyl difluoride Polyvinylidene difluoride References reflist Bibliography cite book last1 Greenwood first1 N. N. last2 Earnshaw first2 A. title Chemistry of the Elements second edition publisher Butterworth Heinemann year 1998 isbn 0 7506 3365 4 ref harv Category Chemical compounds chem stub ... more details
Unreferenced date December 2009 A symmetric hydrogen bond is a special type of hydrogen bond in which the proton is spaced exactly halfway between two identical atoms. The strength of the bond to each of those atoms is equal. It is an example of a 3 center 4 electron bond . This type of bond is much stronger than normal hydrogen bonds, in fact, its strength is comparable to a covalent bond . It is seen in ice at high pressure Ice X , and also in the solid phase of many anhydrous acids such as hydrofluoric acid and formic acid at high pressure. It is also seen in the bifluoride ion F&minus H&minus F sup &minus sup . &minus is also used for schematic single bonds Much has been done to explain the symmetric hydrogen bond quantum mechanically, as it seems to violate the octet rule duet rule for the first shell The proton is effectively surrounded by four electron s. Because of this problem, some consider it to be an ionic bond . Chemical bonds DEFAULTSORT Symmetric Hydrogen Bond Category Chemical bonding uk ... more details
refimprove date April 2012 In acid base chemistry , homoassociation an IUPAC term ref name IUPAC http goldbook.iupac.org H02842.html ref is an association between a base chemistry base and its conjugate acid through a hydrogen bond . The alternate term homoconjugation also has wide usage, ref See for example Agnes K tt, Ivo Leito, Ivari Kaljurand, Lilli Soov li, Vladislav M. Vlasov, Lev M. Yagupolskii, and Ilmar A. Koppel A Comprehensive Self Consistent Spectrophotometric Acidity Scale of Neutral Br nsted Acids in Acetonitrile J. Org. Chem., 2006, volume 71, pp 2829 2838. DOI 10.1021 jo060031y , ref but is ambiguous because it has another meaning in organic chemistry see Conjugated system Mechanism . Most commonly, homoassociation leads to the enhancement of the acid dissociation constant acidity of an acid by itself. The effect is mainly observed at high concentration s. The ionization of an acid varies nonlinearly with concentration. This effect arises from the stabilization of the conjugate base by its formation of a hydrogen bond to the parent acid. A well known case is hydrofluoric acid , which is a significantly stronger acid when concentrated than when dilute due to the following equilibria 2 HF H sup sup HF sub 2 sub sup sup The bifluoride anion HF sub 2 sub sup sup encourages the ionization of HF by stabilizing the F sup sup . Thus, the usual ionization constant for hydrofluoric acid 10 sup 3.15 sup understates the acidity of concentrated solutions of HF. Carboxylic acid s and phenol s also exhibit this effect. The effect of homoassociation is often high in nonaqueous solution s, wherein dissociation is often low. References references Category Equilibrium chemistry Category Acid base chemistry ... more details
The 3 center 4 electron bond is a model used to explain bonding in hypervalent molecule s such as phosphorus pentafluoride , sulfur hexafluoride , the xenon fluorides , and the bifluoride ion. ref Greenwood&Earnshaw p. 897. ref ref Weinhold, F. Landis, C. Valency and bonding , Cambridge, 2005 pp. 275 306. ref It is also known as the Pimentel Rundle three center model after the work published by George C. Pimentel in 1951, ref Pimentel, G. C. The Bonding of Trihalide and Bifluoride Ions by the Molecular Orbital Method. J. Chem. Phys. 1951 , 19 , 446 448. doi 10.1063 1.1748245 ref which built on concepts developed earlier by Robert E. Rundle for electron deficient bonding. ref Rundle, R. E. Electron Deficient Compounds. II. Relative Energies of Half Bonds . J. Chem. Phys 1949 , 17 , 671 675. doi 10.1063 1.1747367 ref Molecular orbital description The model considers bonding of three colinear atoms. For example in XeF sub 2 sub , the linear F&minus Xe&minus F subunit is described by a set of three molecular orbitals MOs derived from colinear p orbitals on each atom. The Xe&minus F bonds result from the combination of a filled p orbital in the central atom Xe with two half filled p orbitals on the axial atoms F , resulting in a filled bonding orbital, a filled non bonding orbital, and an empty antibonding orbital. The two lower energy MO s are doubly occupied. The bond order for each Xe F bonds is 1 2, since the only bonding orbital is delocalized over the two Xe F bonds. ref B.E. Douglas, D.H. McDaniel and J.J. Alexander, Concepts and Models of Inorganic Chemistry , 2nd edition Wiley 1983 p.164 ref The HOMO is localized on the two terminal atoms. This localization of charge is accommodated by the fact that the terminal ligands are highly electronegative in hypervalent molecules. The molecules PF sub 5 sub and SF sub 4 sub are described, according to this model, as having one 3 center 4 electron bond as well as three and two other more conventional 2 center 2 electron c ... more details
Unreferenced stub auto yes date December 2009 about molecular autoionization in solution chemistry by reaction of two identical molecules autoionization of a single atom or molecule a different process studied in physics autoionization Molecular autoionization is a reaction between molecule s of the same substance to produce ion s and is created by semipolar bond s. The oxidation number on all atoms in such a reaction remains unchanged. Such autoionization can be protic hydron chemistry H sup sup transfer , or non protic . Some examples of each are Autoprotolysis Protic solvents span class nounderlines 2 properties of water H sub 2 sub O eqm hydroxonium H sub 3 sub O sup sup hydroxide OH sup sup span see water below div class nounderlines 2 ammonia NH sub 3 sub eqm ammonium NH sub 4 sub sup sup amide ion NH sub 2 sub sup sup div div class nounderlines 2 sulfuric acid H sub 2 sub SO sub 4 sub eqm sulfuric acid Polarity and conductivity H sub 3 sub SO sub 4 sub sup sup bisulfate HSO sub 4 sub sup sup div div class nounderlines 3 hydrogen fluoride HF eqm H sub 2 sub F sup sup bifluoride HF sub 2 sub sup sup div Non protic solvents div class nounderlines 2 phosphorus pentafluoride PF sub 5 sub eqm PF sub 6 sub sup sup PF sub 4 sub sup sup div div class nounderlines 2 sulfur dioxide SO sub 2 sub eqm sulfite SO sub 3 sub sup 2 sup SO sup 2 sup div div class nounderlines 4 aluminium trichloride AlCl sub 3 sub eqm 3 AlCl sub 4 sub sup sup Al sup 3 sup div div class nounderlines 2 bromine trifluoride BrF sub 3 sub eqm BrF sub 2 sub sup sup BrF sub 4 sub sup sup div This type of autoionization can occur in gas es or solid s, but occurs more readily in liquid s. In gases, the molecules are so far apart that ion formation is very unfavorable, and in solids, there is not enough molecular movement. As long as the phase remains constant, autoionization normally increases substantially with increasing pressure . anchor water The self ionization of water is particularly well studied ... more details
chembox verifiedrevid 402870907 Name Vanadium III fluoride ImageFile Aluminium trifluoride 3D polyhedra.png ImageFile2 FeF3structure.jpg ImageName Vanadium III fluoride OtherNames Vanadium fluoride, Vanadium trifluoride Section1 Chembox Identifiers InChI 1 3FH.V h3 1H q 3 p 3 InChIKey PASVSMBJEYQYSN DFZHHIFOAM SMILES V 3 . F . F . F StdInChI Ref stdinchicite correct chemspider StdInChI 1S 3FH.V h3 1H q 3 p 3 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey PASVSMBJEYQYSN UHFFFAOYSA K CASNo 10049 12 4 PubChem 66230 ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 16057827 Section2 Chembox Properties Formula VF sub 3 sub MolarMass 107.9367 g mol Appearance gray green powder Density 3.363 g cm sup 3 sup , solid Solubility insoluble MeltingPt 1406 C BoilingPt Section3 Chembox Structure CrystalStruct Rhombohedral , Pearson symbol hR24 SpaceGroup R 3c, No. 167 Section7 Chembox Hazards EUClass not listed NFPA H 3 NFPA R 2 NFPA F 0 Section8 Chembox Related OtherAnions Vanadium III chloride br Vanadium III oxide br Vanadium III nitride OtherCations Vanadium IV fluoride OtherFunctn Function OtherCpds Vanadium III fluoride is the chemical compound with the formula Vanadium V Fluorine F sub 3 sub . This gray green, refractory solid is obtained in a two step procedure from V sub 2 sub O sub 3 sub . ref Sturm, B. J. Sheridan, C. W. Vanadium III Fluoride Inorganic Syntheses 1963 Vol. 7, pages 52 54. ISBN 0 88275 165 4. ref The first step entails conversion to the hexafluorovanadate III salt using ammonium bifluoride V sub 2 sub O sub 3 sub 6 NH sub 4 sub HF sub 2 sub 2 NH sub 4 sub sub 3 sub VF sub 6 sub 3 H sub 2 sub O In the second step, the hexafluorovanadate is thermally decomposed. NH sub 4 sub sub 3 sub VF sub 6 sub 3 NH sub 3 sub 3 hydrogen fluoride HF VF sub 3 sub The thermal decomposition of ammonium salts is a relatively common method for the preparation of inorganic solids. VF sub 3 sub can also be prepared by treatment of V sub 2 sub O sub 3 s ... more details
Orphan date January 2011 Chembox verifiedrevid 455176045 ImageFileL1 Fluoronium dimensions 2D.png ImageFileL1 Ref chemboximage correct ?? ImageSizeL1 121 ImageNameL1 Skeletal formula of fluoronium with assorted dimensions Citation last Diercksen first G. H. F. last2 von Niessen first2 W. last3 Kraemer first3 W. P. title SCF LCGO MO studies on the fluoronium ion FH sub 2 sub sup sup and its hydrogen bonding interaction with hydrogen fluoride FH journal Theoretical Chemistry Accounts Theory, Computation, and Modeling Theoretica Chimica Acta volume 31 issue 3 pages 205 214 date September year 1973 url http www.springerlink.com content v517wg14w47676r4 doi 10.1007 BF00526510 ImageFileR1 Fluoronium 3D vdW.png ImageFileR1 Ref chemboximage correct ?? ImageSizeR1 121 ImageNameR1 Spacefill model of fluoronium IUPACName Fluoronium SystematicName Fluoranium ref Cite web title Fluoronium CHEBI 50314 url https www.ebi.ac.uk chebi searchId.do?chebiId 50314 work Chemical Entities of Biological Interest ChEBI location UK publisher European Bioinformatics Institute ref Section1 Chembox Identifiers ChemSpiderID 19122106 ChemSpiderID Ref chemspidercite correct chemspider ChEBI Ref ebicite correct EBI ChEBI 50314 SMILES FH2 StdInChI 1S FH2 h1H2 q 1 StdInChI Ref stdinchicite correct chemspider InChI 1 FH2 h1H2 q 1 StdInChIKey YNESUKSMQODWNS UHFFFAOYSA N StdInChIKey Ref stdinchicite correct chemspider InChIKey YNESUKSMQODWNS UHFFFAOYAK Section2 Chembox Properties Formula H sub 2 sub F sup sup MolarMass 21.01428 g mol sup 1 sup ExactMass 21.014053269 g mol sup 1 sup The fluoronium cation , H sub 2 sub F sup sup , is a polyatomic ion formed by protonation or self ionic dissociation of hydrogen fluoride HF H sup sup H sub 2 sub F sup sup or 3HF unicode H sub 2 sub F sup sup Bifluoride HF sub 2 sub sup sup The fluoronium ion is isoelectronic with Properties of water water and the Sodium amide amide ion . Unlike for halonium ion s based on chlorine , bromine or iodine chloronium, H sub 2 sub ... more details
A monofluoride is a chemical compound with one fluoride per formula unit. For a binary compound, this is the formula XF. All the alkali metal s form monofluorides. All have the Cubic crystal system rock salt Rock salt structure sodium chloride rock salt structure and are soluble. sfn Aigueperse et al. 2005 loc Fluorine Compounds, Inorganic, pp. 25 27 Because the fluoride anion is highly basic, many alkali metal fluorides form bifluoride s with the formula MHF sub 2 sub . Sodium and potassium bifluorides are significant to the chemical industry. sfn Aigueperse et al. 2005 loc Fluorine Compounds, Inorganic, pp. 26 27 Among other monofluorides, only silver I fluoride silver I ref cite book last Milne, George W. A. year 2005 title Gardner s commercially important chemicals publisher John Wiley and Sons isbn 978 0 471 73518 2 page 553 ref and thallium I fluoride thallium I ref cite book last Arora first M. G. year 2003 title P block Elements publisher Anmol Publications isbn 8174885633 page 35 ref fluorides are well characterized. Both are very soluble, unlike the other halides of those metals. List of the monofluorides Examples of the difluorides include Metal monofluorides Aluminium monofluoride , an elusive species with the formula AlF Caesium fluoride Copper monofluoride Lithium fluoride Mercury monofluoride Potassium fluoride Rubidum fluoride Silver monofluoride Sodium fluoride Thallium monofluoride Nonmetal monofluorides Boron monofluoride or fluoroborylene has the formula BF Carbon monofluoride CF, CFx, or CF x , also called polycarbon monofluoride Chlorine monofluoride , a volatile interhalogen compound with formula ClF Iodine monofluoride , a chocolate brown solid compound with formula IF Organic monofluorides References reflist Bibliography cite book doi 10.1002 14356007 isbn 9783527306732 first1 Jean last1 Aigueperse first2 Paul last2 Mollard first3 Didier last3 Devilliers first4 Marius last4 Chemla first5 Robert last5 Faron first6 Ren e last6 Romano first7 Je ... more details
chembox Verifiedfields changed Watchedfields changed verifiedrevid 459587857 ImageFile ScF3structure.jpg ImageName IUPACName Scandium III fluoride OtherNames Scandium trifluoride Section1 Chembox Identifiers CASNo Ref cascite changed ?? CASNo 13709 47 2 PubChem 83678 EINECS 237 555 4 RTECS VQ8930000 InChI 1S 3FH.Sc h3 1H q 3 p 3 SMILES F Sc F F Section2 Chembox Properties Formula ScF sub 3 sub MolarMass 101.95112 g mol Appearance bright white powder Density 2.53 g cm sup 3 sup Solvent SolubleOther MeltingPt 1552 C ref name Wiberg&Holleman Egon Wiberg, Arnold Frederick Holleman 2001 Inorganic Chemistry , Elsevier ISBN 0123526515 ref BoilingPt 1607 C ref name Wiberg&Holleman Viscosity Section3 Chembox Structure CrystalStruct Rhombohedral , Pearson symbol R32 SpaceGroup hR12, No. 155 Section7 Chembox Hazards NFPA H 2 NFPA F 0 NFPA R 0 NFPA O Section8 Chembox Related OtherCpds Scandium III chloride br Scandium III nitrate Scandium III fluoride , ScF sub 3 sub , is an ionic compound. It has the vanadium III fluoride , VF sub 3 sub , structure, which is similar to the rhenium IV oxide , ReO sub 3 sub structure, containing 6 coordinate metal ions. ref name Wiberg&Holleman It is slightly soluble in water but dissolves in the presence of excess fluoride to form ScF sub 6 sub sup 3 sup . ref name Wiberg&Holleman ScF sub 3 sub can be produced by reacting scandium and fluorine. ref name Simon Cotton S.A.Cotton, Scandium, Yttrium and the Lanthanides Inorganic and Coordination Chemistry, Encyclopedia of Inorganic Chemistry, 1994, John Wiley & Sons, ISBN 0471936200 ref It is also formed during the extraction from the ore thortveitite by the reaction of Sc sub 2 sub O sub 3 sub with ammonium bifluoride at high temperature ref name Patnaik Pradyot Patnaik, 2003, Handbook of Inorganic Chemicals , McGraw Hill Professional, ISBN 0070494398 ref Sc sub 2 sub O sub 3 sub NH sub 4 sub HF sub 2 sub 2ScF sub 3 sub 6NH sub 4 sub F 3H sub 2 sub O The resulting mixture contains a number of meta ... more details
chembox verifiedrevid 400095374 Name Formyl fluoride ImageFileL1 Formyl fluoride 2D.png ImageNameL1 Formyl fluoride ImageFileR1 Formyl fluoride 3D vdW.png ImageNameR1 Formyl fluoride IUPACName Formyl fluoride OtherNames Formic acid fluoride Section1 Chembox Identifiers SMILES FC O ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 14424 PubChem 15153 InChI 1 CHFO c2 1 3 h1H InChIKey NHGVZTMBVDFPHJ UHFFFAOYAX StdInChI Ref stdinchicite correct chemspider StdInChI 1S CHFO c2 1 3 h1H StdInChIKey Ref stdinchicite correct chemspider StdInChIKey NHGVZTMBVDFPHJ UHFFFAOYSA N CASNo 1493 02 3 Section2 Chembox Properties Formula CHFO MolarMass 48.02 g mol Appearance Colourless gas Density Solubility decomposes Solvent other solvents SolubleOther chlorocarbons, br Freon s MeltingPt 142 C BoilingPt 29 C Section3 Chembox Structure Dipole 2.02 Debye D ref name LeB LeBlanc, Jr., O. H. Laurie, V. W. Gwinn, W. D. Microwave Spectrum, Structure, and Dipole Moment of Formyl Fluoride The Journal of Chemical Physics 1960, volume 33, pp. 598 600. ref Section7 Chembox Hazards ExternalMSDS MainHazards toxic Section8 Chembox Related OtherCpds Formic acid br Hydrogen fluoride br Carbonyl fluoride Formyl fluoride is the organic compound with the formula FC O H. Preparation FC O H was first reported in the 1934. ref Nesmejanow, A. N. Kahn, E. J. ber die unmittelbare Synthese von S ure fluoriden aus S uren und die Herstellung von Formylfluorid Chemische Berichte. 1934, volume 67, page 370 373. DOI 10.1002 cber.19340670303 ref Among the many preparations, a typical one involves the reaction of sodium formate with benzoyl fluoride generated in situ from Potassium bifluoride KHF sub 2 sub and benzoyl chloride ref name Olah Olah, G. A. Ohannesian, L. Arvanaghi, M, Formylating Agents Chemical Reviews, 1987, volume 87, pp 671 686. DOI 10.1021 cr00080a001 ref NaOC O H C sub 6 sub H sub 5 sub C O F &rarr FC O H C sub 6 sub H sub 5 sub CO sub 2 sub Na Structure The molecule is planar C O and ... more details
pair to dissociate with formation of the hydrogen bonded bifluoride hydrogen difluoride ion . ref ... of a solution of HF and potassium bifluoride . The potassium bifluoride is needed because anhydrous ... more details
chembox verifiedrevid 454767937 Name Ammonium fluoride ImageFileL1 Ammonium.svg ImageSizeL1 90px ImageNameL1 The ammonium cation ImageFileR1 F .svg ImageSizeR1 30px ImageNameR1 The fluoride anion ImageFile2 Ammonium fluoride 3D balls ionic.png ImageSize2 150px ImageName2 ball and stick model of an ammonium cation left and a fluoride anion right ImageFile3 Fluorid amonn .PNG ImageName3 Solid sample of ammonium fluoride IUPACName Ammonium fluoride OtherNames Neutral ammonium fluoride Section1 Chembox Identifiers InChI 1 FH.H3N h1H 1H3 SMILES F . NH4 InChIKey LDDQLRUQCUTJBB UHFFFAOYAM StdInChI Ref stdinchicite correct chemspider StdInChI 1S FH.H3N h1H 1H3 StdInChIKey Ref stdinchicite correct chemspider StdInChIKey LDDQLRUQCUTJBB UHFFFAOYSA N CASNo 12125 01 8 CASNo Ref cascite correct CAS RTECS BQ6300000 ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 23806 EINECS 235 185 9 UNNumber 2505 Section2 Chembox Properties Formula NH sub 4 sub F MolarMass 37.037 g mol Appearance White crystalline solid br hygroscopic Density 1.009 g cm sup 3 sup Solubility 45.3 g 100 ml 25 C SolubleOther slightly soluble in alcohol, insoluble in liquid ammonia MeltingPt 100 C decomp Section3 Chembox Structure CrystalStruct Wurtzite crystal structure Wurtzite structure hexagonal Section7 Chembox Hazards ExternalMSDS http www.inchem.org documents icsc icsc eics1223.htm ICSC 1223 EUIndex 009 006 00 8 EUClass Toxic T RPhrases R23 24 25 SPhrases S1 2 , S26 , S45 NFPA H 3 NFPA F 0 NFPA R 0 NFPA O FlashPt Non flammable Section8 Chembox Related OtherAnions Ammonium chloride br Ammonium bromide br Ammonium iodide OtherCations Sodium fluoride br Potassium fluoride OtherCpds Ammonium bifluoride Ammonium fluoride is the inorganic compound with the formula NH sub 4 sub F. It crystallizes as small colourless prisms, having a sharp saline taste, and is exceedingly soluble in water. Crystal structure Ammonium fluoride adopts the Wurtzite crystal structure wurtzite crystal structure, in which bo ... more details
File Tetrafluoroammonium ion.png thumb 150px 2D model of the tetrafluoroammonium ion The tetrafluoroammonium ion cation also known as perfluoroammonium is a positively charged polyatomic ion with chemical formula chem NF 4 . It is equivalent to the ammonium ion where the hydrogen atoms surrounding the central nitrogen atom have been replaced by fluorine . ref cite doi 10.1070 RC1985v054n05ABEH003068 ref . Tetrafluoroammonium ion is isoelectronicity isoelectronic with tetrafluoromethane chem CF 4 and tetrafluoroborate chem BF 4 ion. The tetrafluoroammonium ion forms salt chemistry salts with a large variety of fluorine bearing anions. These include the bifluoride anion chem HF 2 , tetrafluorobromate chem BrF 4 , metal pentafluorides chem XF 5 where X is germanium Ge , tin Sn , or titanium Ti , hexafluorides chem XF 6 where X is phosphorus P , arsenic As , antimony Sb , bismuth Bi , or platinum Pt , heptafluorides chem XF 7 where X is tungsten W , uranium U , or xenon Xe , octafluorides chem XeF 8 2 , ref cite doi 10.1021 ic00142a001 ref various oxyfluorides chem XF 5 O where X is W or U chem link fluorosulfuric acid FSO 3 , chem BrF 4 O , and perchlorate chem ClO 4 . ref name karlchriste cite doi 10.1021 ic00231a038 ref Attempts to make the nitrate salt, chem NF 4 NO 3 , were unsuccessful because of quick fluorination chem NF 4 chem NO 3 chem NF 3 chem FONO 2 . ref name hoge cite doi 10.1016 S0022 1139 01 00415 8 ref Structure The geometry of the tetrafluoroammonium ion is tetrahedral molecular geometry tetrahedral , with an estimated nitrogen fluorine bond length of 124 Picometre pm . All fluorine atoms are in equivalent positions. ref name sykes1 Synthesis Tetrafluoroammonium salts are prepared by oxidising nitrogen trifluoride with fluorine in the presence of a strong Lewis acid which acts as a fluoride ion acceptor. The original synthesis by Tolberg, Rewick, Stringham, and Hill in 1966 employs antimony pentafluoride as the Lewis acid ref name sykes1 chem NF ... more details
of acyl fluoride on a difluoromethyl cation, followed by neutralization with in situ generated bifluoride, leads to tetrafluorinated ether products. Direct reaction with bifluoride affords trifluoromethyl ... more details
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