Fluorine anion name

The most studied ionic liquids (ILs) in the literature are chloroaluminate-based ionic liquids. Chemical properties such as Lewis acidity depend on the nature of the anion, namely AI2CI7. Considering the acidity parameter as the key point to design a liquid-phase fluorination catalyst, a new range of acidic ILs has been set up [9]. These ILs have been synthesized starting from halogenated metallic acids MX, (with M = Ti, Nb, Ta, Sn, Sb and X = Cl and/or F), such as Ta(V)Cl Fj, Nb(V)Cl Fj, Ti(IV)Cl Fj, Sn(IV)Cl Fj, Sb(V)Cl Fj,. Among these compounds, anions derived from SbCl F, (x -i-y = 5,0[Pg.536]

In the presence of fluorine anions, low-saturated (5 pM) solutions of one of the pyr-azoles, namely, 3-amino-5-(5-phenylpyrrol-2-yl)pyrazole-4-carboxamide, intensively fluoresce in blue region 424 nm, quantum yield 0.74), while other anions (Cl", Br, I, HSO4, H2PO4, AcO) do not affect the emission parameters [579]. The results indicate this compound is suitable for fluoride sensing by a naked eye detection. 

Experience in PTC with cationic catalysts showed that, in general, the most suitable compounds have symmetrical structures, are lipophilic, and have the active cationic charge centrally located or sterically shielded by substituents. For anionic catalysis sodium tetraphenylborate fulfills these conditions, but it is not stable under acidic conditions. However, certain derivatives of this compound, namely sodium tetra-kis[3,5-bis(trifluoromethyl)phenyl]borate (TFPB, 12.162) and sodium tetrakis[3,5-bis-(l,l,l,3,3,3-hexafluoro-2-methoxy-2-propyl)phenyl]borate (HFPB) are sufficiently stable to be used as PTC catalysts for azo coupling reactions (Iwamoto et al., 1983b 1984 Nishida et al., 1984). These fluorinated tetraphenylborates were found to catalyze strongly azo coupling reactions, some of which were carried out with the corresponding diazotization in situ. 

It has been well recognized that the hydrolysis of alkoxysilanes and chlorosilanes is effectively catalyzed when fluoride anions are present due to formation of hypercoordinated silicon intermediates.803 More in-depth studies by Bassindale et al. showed that the reaction of PhSi(OEt)3 with stoichiometric amounts of Bu4NF surprisingly yields an encapsulation complex, namely tetrabutylammonium octaphenyloctasilsesquioxane fluoride 830, in which the fluorine atom is situated inside the cubic siloxane cage (Scheme 114). The Si--F distance of average 2.65 A is shorter than the sum of van der Waals radii (3.57 A), which renders the coordination number of the silicon atoms at [4+1]. 

When in compounds such as NF3 and OF2 the nitrogen or oxygen atom is bound to the strongly electronegative fluorine atoms, it has become positive and it still possesses only such a small proton affinity that these molecules no longer form complexes. OF2 is an oxygen fluoride and not a fluorine oxide, if we indicate the anion, the acid residue, by the second part of the name. 

The name for OF2 is oxygen difluoride rather than difluorine oxide because fluorine has a higher electronegativity than oxygen and thus is named as the anion. 

Thus, when a metallic element and a nonmetallic element combine, the nonmetallic atoms often pull one or more electrons far enough away from the metallic atoms to form ions. The positive cations and the negative anions then attract each other to form ionic bonds. In the formation of sodium fluoride from sodium metal and fluorine gas, each sodium atom donates one electron to a fluorine atom to form a Na cation and an F" anion. The F anions in toothpaste bind to the surface of your teeth, making them better able to resist tooth decay. This section provides you with more information about other cations and anions, including how to predict their charges and how to convert between their names and formulas. 

The terminal fluorine in the anion closest to the cation is in irons position to the internal bridging fluorine in the anion. The Sb-F (terminal) distance is similar to those observed in SbFg anions, like in ClF SbFg or XeF SbF6, namely 1.84 and 1.83 A, respectively. 

The SbjFfi anion itself is symmetric, namely the distances between both antimony atoms and the bridging fluorine are the same 2.00 A. This is in contrast to many other salts with this dimeric anion in which these distances are non-equal. The cation-anion interaction causes a movement of the closest fluorine to the cation towards the central atom in it, as well as some charge donation to the cation. This in turn involves some loss of electron density at the Sb atom of that half closer to the... 

However, under the conditions that favor dissociation of the adducts and disfavor p-elimination, namely, a higher temperature and absence of a strong base, the conventional S Ar of fluorine atom can be observed [13]. Interestingly, the reaction of wefa-dinitrobenzene with an excess of this carbanion gave the disubstitution product, whereas with equimolar amounts of reactants only monosubstitution proceeds. It is evident that the anion of 2,4-dinitrobenzyl phenyl sulfone is still sufficiently active electrophile to react with the carbanion of chloromethyl phenyl sulfone (Scheme 3) [14]. 

The cation is magnesium. The anion is fluorine, which becomes fluoride. Its correct name is magnesium fluoride. 

Peifluoropolyethers Similarly to fluorinated olefins, the introduction of fluorine atoms onto the poly(ethylene oxide) (PEO) backbone has been explored through the family of perfluoropolyethers (sometimes coined perfluoroalkylethers or perfluoropolyalkylethers). Functionalized poly(hexafluoropropylene oxides) are representative perfluoropolyethers that actually attracted early attention for their solubility in SC-CO2 (see Figure 13.5). These polymers are produced by anionic ringopening polymerization of HFP oxide and commercialized as industrial lubricants by Dupont under the name of Krytox . 

Despite numerous syntheses of Voriconazole (10) were documented, they all followed the same synthetic strategy, namely, addition of anion 221 to ketone 222, followed by isolation of necessary diastereomeric pair and its resolution with 10-camphorsulphonic acid (Schane 53). Three different approaches were used for the generation of anion 221 or the corresponding organometallic species. First of them relied on deprotonation of the pyrimidine derivative 222 (prepared from the fluorinated keto ester 223 or dichloro derivative 93) by strong bases such as LDA (Scheme 54) [183-189]. 

For monoatomic anions replace ending from element name with -ide suffix. Example F (fluorine) becomes F" or fluoride... 

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