Fluorine boron

C21-0008. Sulfur tetrafluoride fluorinates boron trichloride according to the following unbalanced equation BCI3 + SF4 BF3 + SCI2 + CI2 This is both a redox reaction and a metathesis reaction, (a)... 

Investigations on solid samples have been reported for a rather large variety of compounds generally using phosphorus resonance but in some cases proton, fluorine, boron and even 23Na resonances (1969 217) and relaxation time measurements have been used. Phosphides, and especially simple or mixed paramagnetic phosphides, have often been... 

Determination of Mercury, Fluorine, Boron, and Selenium. The Determination of Mercury. A coal sample is decomposed by igniting a combustion bomb containing a dilute nitric acid solution under 24 atm of oxygen. After combustion, the bomb washings are diluted to a known volume, and mercury is determined by atomic absorption spectrophotometry using a flameless cold vapor technique. 

Finally, a substantial limitation of our compilation is that it includes very sparse data on chlorine, fluorine, boron, beryllium, and lithium, and essentially no data on volatile contents (H2O, CO2, sulfur, noble gases). While data on H2O in glass inclusions are beginning to become available, it is not yet clear, for example, to what extent H2O contents in primitive arc magmas... 

Surrounding boron are three space occupying groups, the three fluorines. Boron does not have an octet of electrons. Therefore it assumes a trigonal shape and is sp2 hybridized. 

K. Jug and D. N. Nanda, Theor. Chim. Acta, 57, 131 (1980). SINDOI. 111. Application to Ground States of Molecules Containing Fluorine, Boron, Beryllium, and Lithium. 

H. S. Lee, X. Q. Yang, X. Sun, J. McBreen, . Power Sources 2001,97—98,566-569. Synthesis of a new family of fluorinated boronate compounds as anion receptors and studies of their use as additives in lithium battery electrolytes. 

From an electrochemical point of view, one might speculate that a fluorine surface termination would render the diamond electrode surface more resistant to oxidation and perhaps even less susceptible to adsorption (e.g. Teflon-like surface). Angus and coworkers fluorinated boron-doped, polycrystaUine diamond electrodes by exposure to a CF4 radio frequency plasma (88j. This is the only example, to the best of our knowledge, of an elechochem-ical study of an F-terminated diamond electrode. The XPS F/C atomic ratio was in the range of 0.16 to 0.18 after plasma treatment. The first voltammehic scan out to 2.5 V vs. SHE in 0.5 M H2SO4 produced... 

Attempts to prepare tris(peffluoroisopropyl)borate from caesium per-fiuoroisopropoxide (from (CF,),CO + CsFJ and boron trichloride have been unsuccessful. A whole range of fluorinated boron esters has been... 

Pozdnyakov IP, Aksenova YV, Eimolina EG, Melnikov AA, Kuznetsova RT, Grivin VP, Plyusnin VF, Berezin MB, Semeikin AS, Chekalin SV (2013) Photophysics of diiodine-substituted fluorinated boron-dipyiromethene a time resolved study. Chem Phys Lett 585 49-52... 

John specialized in fluorine, boron, sulfur, phosphorus, and metal carbonyl chemistry. With M. Frederick Hawthorne, he discovered a series of amine complexes of aluminum trihydride and showed that some of them give aluminum metal when heated this process later became useful for the formation of aluminum thin films by chemical vapor deposition. One of his notable achievements was the discovery that the PPN cation, bisftriphenylphosphoranyhdene) ammonium, forms air-stable salts with many air-sensitive anions such as [Co(CO)4] . He also discovered that cesium fluoride can serve as a catalyst for the synthesis of organic fluoroxy compounds (RpOF) by the fluorination of acyl halides. 

Table 6.12 Iodine, fluorine, boron and silicon contents in some crops and foods. 

Weng W, Zhang Z, Schlueter JA, Redfem PC, Curtiss LA, Amine K (2011) Improved synthesis of a highly fluorinated boronic ester as dual functional electrolyte additive for lithium-ion batteries. J Power Sources 196 2171-2178. doi 10.1016/j.jpowsour.2010.09.110... 

Figure 8 Metallocene activation via (a, b) fluorinated borate and (c) fluorinated boron activators.

X 10 S cm". This approach is seemingly espedally useful for battery electrolytes, because the transference number of the lithium ion is increased recently, Weng et al. [519] reported an improved synthesis of tetrafluoro-catechol [105] that is a starting material for the fluorinated boronate ester, 2-(pentafluorophenyl)-tetrafluoro-l,3,2-benzodioxaborole (PFPTFBB). PEPTEBB acts as an anion receptor. In addition, it is an effective redox shuttle for overcharge protection of lithium-ion batteries. Conceptually, this approach is similar to the use of lithium salts with large anions or the immobilization of anions at polymer backbones. 

Fluorinated boronate compounds DME or ECyOMC, UPFj Better conductivity, high electrochemical stability up to 5 V 173... 

F Chemical Shifts of Fluorinated Boron, Phosphorus, and Silicon Compounds (6 in ppm relative to CFCI3, Jpp in Hz)... 

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