Solubility of fluorocarbons in water as a key parameter determining fluorocarbon emulsion stability

The kinetics of particle size growth in emulsions of 14 fluorocarbons has been studied by means of photon correlation spectroscopy. It was assumed that Ostwald ripening is the mechanism of emulsion coarsening with time; solubility of fluorocarbons in water (about 10⁻⁶-10⁻¹⁰ml/ml) being the key parameter determining fluorocarbon emulsion stabilities. The solubilities of fluorocarbons in water were calculated from the Ostwald ripening kinetics data and a solubility-fluorocarbon structure relationship was established. In a homologous series of normal chain fluorocarbons the solubility in water decreased by a factor of 8.0 for each -CF₂ - group. For a given carbon number, ring formation and branching increased water solubility of the fluorocarbons. A correlation between fluorocarbon solubility in water and solvent cavity surface area was found which allows prediction of the fluorocarbon emulsion stability from the structure of the fluorocarbon.     

Reaction of boric acids of ferrocene with copper tetraphenylborate

Conclusions The reaction of copper tetraphenylborate with 1-(1-bromoferrocenyl)boric acid and ferrocenylboric acid results in the respective formation of phenylferrocene (together with a small amount of 1,1-diphenyl-ferrocene) and ferrocene (together with phenylferrocene and biferrocenyl).Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2583–2584, November, 1971.     

Reactions of triferrocenylchloromethane hydrochloride

Conclusions Triferrocenylchloromethane hydrochloride reacts with nucleophilic reagents (organomagnesium and-sodium compounds, aluminum lithium hydride, sodium methylate, sodium cyanide) to yield the corresponding triferrocenylmethane derivatives.     

Organotungsten σ-derivatives of cymantrene

Conclusions Some organotungsten -derivatives of cymantrene, -C₅H₅ (CO)₃WR and -C₅H₅ (CO)₂(PPh₃)WR (R = C₅H₄Mn(CO)₃ and COC₅H₄,Mn(CO)₃).Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2328–2330, October, 1977.     

1-(1'-Bromoferrocenyl)silver

Conclusions 1-(1'-bromoferrocenyl)silver was prepared, and some of its properties were investigated.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1827–1829, August, 1969.     

Synthesis of nitrilecyclopentadienyltricarbonyl-manganese and nitrilecyclopentadienyltri-carbonylrhenium

Russian Chemical Bulletin -