Potassium fluoroborate

Potassium Fluoroborate. Potassium fluoroborate is produced as a gelatinous precipitate by mixing fluoroboric acid and KOH or K CO. Alternatively, fluorosihcic acid is treated with H BO in a 2 1 molar ratio to give HBF OH, which reacts with HF and KCl to yield 98% of KBF in 98.5% purity (52). Commercial KBF normally contains less than 1% KBF OH. 

Potassium tetra(l-indolyl)boron (419) was obtained as an infusible white solid by boiling an ethereal solution of indole magnesium bromide with potassium fluoroborate under reflux for 6 hours. 

Potassium fluoroborate [14075-53-7] M 152.9. Crystd several times from conductivity water (15ml/g). 

Both ammonium fluoroborate (NH4BF4) and potassium fluoroborate (KBF4) were reported to be flame retardants in both Cl/Br-containing and halogen-free polymers. Ammonium fluoroborate sublimes at 238°C and potassium fluoroborate has a melting point of 359°C. 

Owens-Corning claimed the use of ammonium fluoroborate or potassium fluoroborate as smoke suppressant in isocyanurate-urethane.107 It was believed that the fluoroborate decomposition products such as BF3, KF, or NH4F act as free radical chain stopper and add across double bounds of olefinic decomposition products. NASA reported that both ammonium fluoroborate and potassium fluoroborate are the effective endothermic fillers of ablative intumescent coating.108... 

SYNS AVOGODRITE POTASSIUiM FLUOBORATE POTASSIUM FLUOROBORATE TETRAFLUORO-BORATE-(l-) POTASSIUM... 

Oxo-anions can be considered as complexes. Calcium carbonate, for example, can be made from two stable, saturated compounds, CaO+COg- CaCOg, and its crystals contain COg " ions in which one carbon atom is attached to three oxygen atoms. Potassium perchlorate, KCIO4, and potassium fluoroborate, KBF, both have the same structure with discrete complex ions. The compounds K2SO4 and Cs2HgBr4 have not only the same rhombic form but the same crystallographic axial ratios in which a b c = = 1 0.74 0.57. 

Synonyms Avogadrite Borate(l-), tetrafluoro-, potassium Potassium borofluoride Potassium fluoroborate Potassium tetrafluoroborate Tetrafluoroborate (1-) potassium... 

Discuss the electronic structure of potassium fluoroborate, KBF4. solution in water contains the ion BF4". 

Tetrakis chelate anions formed when either a silver or potassium P-diketonate is mixed with a lanthanide tris P-diketonate are effective shift reagents for organic-soluble salts. Adding an organo-halide or fluoroborate salt leads to precipitation of silver halide or potassium fluoroborate, resulting in an organic-soluble ion pair. These reagents have been used to enantiomerically resolve the spectra of chiral isothiouronium and sulfonium ions. 

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