Study was made of host-guest complexation of neutral crown ethers with fiveand six-membered Nheteroaromatic cations and purinium cation. Complexation of tetraphenylborate with selected Nheteroaromatic cations and tropylium cation also was studied. Crown ether complexes were characterized by mass spectrometric and 1H NMR spectrometric methods and by X-ray crystallography. Fast atom bombardment m...

The "chlorination/fluorination" technique for aliphatic trifluoromethyl ether synthesis was investigated and a range of products with various functional groups was prepared. The results were compared with oxidative desulfurization-fluorination of xanthates with the same structure.

The titaniumoxoanion complex [(Et2O)2Li][OTi(N[ tBu]3,5-Me2C6H3)3] ([(Et2O)2Li][1]) reactswithCO2 indiethyl ether to form the carbonate complex ([Li][O2COTi(N[ tBu]3,5-Me2C6H3)3])6 ([Li][2]). The solidstate structure of complex [Li][2] is a hexamer with a hexagonal prismatic core comprised of six lithium cations bridgedby the carbonate functionality. In themonomeric subunits of [Li][2], the car...

silica-grafted n-propyl-diaza-15-crown-5 (sgpdc) with immobilized palladium nanoparticles was found as an efficient heterogeneous catalytic system for the heck and suzuki coupling reactions and satisfied results were obtained. different derivatives of aryl halides and alkenes under the heck reaction were converted to the corresponding products with good efficiency. the presence of electron-dona...