Beryllium difluoride

The interaction of magnesium with beryllium difluoride is highly exothermic. 

The double fluoride, ammonium hexafluorovanadate ((NH4)3VF6), forms from the oxide at 210 to 250 °C, but decomposes at 600 to 700 °C to yield pure vanadium fluoride. Examples of metal fluorides obtainable through the double fluoride route include uranium tetrafluoride, beryllium difluoride and the rare earth fluorides ... 

Lebeau and Damiens obtained the simplest fluorocarbon carbon tetrafluoride (CF4), separating it from fluorine formed at a carbon anode during electrolysis of beryllium difluoride (the first organic product from electrochemical fluorination). 

Figure 5 F-NMR spectrum of an aqueous solution of beryllium difluoride at room temperature (Reprinted from Ref. 7, 2001, with permission from Elsevier)...

BERYLLIUM DIFLUORIDE or BERYLLIUM FLUORIDE (7787-49-7) BeFj Mixture with water form an acid solution. Incompatible with acids, caustics, chlorinated hydrocarbons, oxidizers, molten lithium, magnesium Aqueous solution is incompatible with organic anhydrides, acrylates, aleohols, aldehydes, alkylene oxides, substituted allyls, cresols, eaprolactam solution, epiehlorohydrin, ethylene dichloride, glycols, isocyanates, ketones, maleie anhydride, nitrates,... 

Beryllium complexes, 3 amines, 7 anionic, 10 hydrates, 6 phthalocyanine, 59 poly carboxylic acid, 33 Schiff bases, 28 Beryllium dichloride ether complexes, 8 Beryllium difluoride ammine complexes, 7 Beryllium dihalides sulfide complexes, 10 Beryllium halides amine complexes, 8 ammonia complexes, 7 carbonyl complexes, 9 Beryllium nitrate basic, 32... 

Recently, Agarwal et al. (2007) showed that beryllium difluoride exhibits some properties similar to liquid water. 

Anhydrous beryllium halides are covalent. The fluoride, Bep2, is obtained as a glass (sublimation point 1073 K) from the thermal decomposition of [NH4]2[BeF4], itself prepared from BeO and NH3 in an excess of aqueous HF. Molten BeF2 is virtually a non-conductor of electricity, and the fact that solid Bep2 adopts a p-cristobalite structure (see Section 6.11) is consistent with its being a covalent solid. Beryllium difluoride is very soluble in water, the formation of [Be(OH2)4] (see Section 12.8) being thermodynamically favourable (Table 12.1). 

Experimental evidence shows that the two or three electron pairs in a multiple bond behave as a single electron pair in establishing molecular geometry. This appears if we compare beryllium difluoride, carbon dioxide, and hydrogen cyanide, whose Lewis diagrams are... 

V.V. Ignatiev, et al.. Experimental study of physical properties of salt melts containing fluorides of sodium, lithium and beryllium difluoride. At. Energy 101 (5) (2006) 364—372. 

V. Afonichkin, A. Bovet, V. Ignatiev, et al.. Dynamic reference electrode for investigation of fluoride melts containing beryllium difluoride, J. Fluor. Chem. 130 (1) (January 2009) 83-88. 

This reaction comes to a stop with the formation of the stable complex beryllium fluoride-sodium difluoride (BeF2 2 NaF) and only a part of the beryllium can thus be obtained as metal (78), Analogous conditions have been described by Lebeau in the fusion electrolysis of beryllium fluoride-monosodium fluoride (51, 78), which stops when the bath reaches the composition of beryllium fluoride-sodium difluoride. 

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