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FLUORINE COMPOUNDS, INORGANIC

Kirk-Othmer Encyclopedia of Chemical Technology (4th Edition) [Pg.136]

The fluoride ion is the least polarizable anion. It is small, having a diameter of 0.136 nm, 0.045 nm smaller than the chloride ion. The isoelectronic E and ions are the only anions of comparable size to many cations. These anions are about the same size as K and Ba and smaller than Rb and Cs . The small size of E allows for high coordination numbers and leads to different crystal forms and solubiUties, and higher bond energies than are evidenced by the other haUdes. Bonds between fluorine and other elements are strong whereas the fluorine—fluorine bond is much weaker, 158.8 kj/mol (37.95 kcal/mol), than the chlorine—chlorine bond which is 242.58 kJ/mol (57.98 kcal/mol). This bond weakness relative to the second-row elements is also seen ia 0-0 and N—N single bonds and results from electronic repulsion. [Pg.137]

A number of elements exhibit the highest oxidation state only because fluorides and oxidation states of +6 and +7 are not uncommon. Examples of volatile fluorides of high oxidation state iaclude VE, CrE, TaE, WE, MoE, PtE, ReE, ReE, and lE. Many complex fluorides demonstrate coordination not found for the other larger hahdes, eg, NiF g, SiF g, TaF , TaF g, PF g, AsF g, ZrF , and PbF .  [Pg.137]

Fluorine forms very reactive halogen fluorides. Reaction of CI2 and F2 at elevated temperatures can produce GIF, CIF, or CIF 3 be obtained from the reaction of Br2 and F2. These halogen fluorides react with all nonmetals, except for the noble gases, N2, and O2 (5). Fluorine also forms a class of compounds known as hypofluorites, eg, CF OF (6). Fluorine peroxide [7783-44-0], O2F2, has also been reported (6). [Pg.137]

The names fluorine and fluorospar are derived from the Latin fluere meaning flow or flux. In 1529 the use of fluorspar as a flux was described. In 1670 the etching of glass by acid-treated fluorspar was reported. Elemental fluorine was isolated by Moissan ia 1886 (7). [Pg.137]


HFinprdnof [FLUORINE COMPOUNDS, INORGANIC - HYDROGEN] (Volll) -pharmacodynamics of [PHARMIACODYNAMICS] (Vol 18)... [Pg.55]


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Fluorination compounds

Fluorine compounds

Inorganic compounds

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