Thermal stability of silver(II) sulphate, Ag(II)SO4 has been investigated by the use of thermogravimetrical analysis. It has been found that this compound exhibits an unprecedented pathway upon thermal decomposition. First, unlike all its congeners, it evolves oxygen and not sulphur trioxide. Secondly, it does so at a record low temperature of 100 oC. Third, it leaves the disulphate salt (Ag2S2O7 containing [S2O7]2- anion) and not the oxide of Ag(I) as a solid residue. The article was chosen for the cover page of the journal Chemistry Eur. J., 2011, vol. 17, which covers all main areas of chemistry.
COBISS.SI-ID: 25007143
Heteroleptic chlorosilylene [PhC(NtBu)]2SiCl] reacts with unsaturated organic compounds under oxidative addition. Reactions with cyclooctatetraene and diimine afford [1 + 4] cycloaddition products, while reaction with carbodiimide yields silaimine complex. Chlorosilylene reacts with isocyanate with the cleavage of C=O bond and formation of four-membered Si2O2 cycle. When chlorosilylene is treated with diphenyldisulfide, cleavage of the S–S occurs.
COBISS.SI-ID: 24661287
New methods applicable for calibration of indicator electrodes, based on standard addition and standard subtraction methods are suggested and compared to several other methods known hitherto. Some of the methods suggested enable simultaneously determination of the slope of the indicator electrode and determination of the equivalence volume from a single set of potentiometric titration data. The methods were tested in potentiometric titrations using fluoride and calcium ion selective electrodes and platinum electrode used in the redox titration.
COBISS.SI-ID: 24441639