Synthesis and Some Properties of Lanthanide Bromotungstates

Lanthanide bromotungstates LnWO4Br, where Ln = Pr, Nd, Gd, or Y, are obtained for the first time by solid-state synthesis starting from lanthanide oxobromides and tungsten trioxide. The compounds were identified based on chemical, crystal-optical, and X-ray powder diffraction evidence. The thermal stability was determined, and the unit cell parameters were calculated for the compounds under study

Synthesis and Some Properties of Lanthanide Bromotungstates

Lanthanide bromotungstates LnWO4Br, where Ln = Pr, Nd, Gd, or Y, are obtained for the first time by solid-state synthesis starting from lanthanide oxobromides and tungsten trioxide. The compounds were identified based on chemical, crystal-optical, and X-ray powder diffraction evidence. The thermal stability was determined, and the unit cell parameters were calculated for the compounds under study

Neodymium and Dysprosium Bromotetraoxomolybdates

The interaction of neodymium and dysprosium oxobromides with molybdenum(VI) oxide was studied by the DTA, X-ray diffraction, and crystal-optical techniques. The compounds of a new type LnMoO4Br with Ln = Nd of Dy were synthesized. The individuality of the synthesized compounds was confirmed. The crystal lattice parameters were calculated, and the thermal stability of the bromotetraoxomolybdates was studied

Neodymium and Dysprosium Bromotetraoxomolybdates

The interaction of neodymium and dysprosium oxobromides with molybdenum(VI) oxide was studied by the DTA, X-ray diffraction, and crystal-optical techniques. The compounds of a new type LnMoO4Br with Ln = Nd of Dy were synthesized. The individuality of the synthesized compounds was confirmed. The crystal lattice parameters were calculated, and the thermal stability of the bromotetraoxomolybdates was studied

Synthesis and Selected Properties of LaWO4Br

Lanthanum oxobromotungstate LaWO4Br was prepared by solid-state synthesis. The compound was studied by various methods of physicochemical analysis: chemical, crystal-optical, differential-thermal, X-ray diffraction, scanning electronic microscopy, and second optical harmonic generation. The crystals of the compound are orthorhombic, space group Pbcm. The unit cell parameters for LaWO4Br were determined: a = 5.912(1) Å, b = 7.931(2) Å, c = 19.728(2) Å, V = 925.2(2) Å3. Selected physicochemical parameters of the compounds were studied. Pyroelectric properties of the compounds were found over a wide temperature range

Synthesis and Selected Properties of LaWO4Br

Lanthanum oxobromotungstate LaWO4Br was prepared by solid-state synthesis. The compound was studied by various methods of physicochemical analysis: chemical, crystal-optical, differential-thermal, X-ray diffraction, scanning electronic microscopy, and second optical harmonic generation. The crystals of the compound are orthorhombic, space group Pbcm. The unit cell parameters for LaWO4Br were determined: a = 5.912(1) Å, b = 7.931(2) Å, c = 19.728(2) Å, V = 925.2(2) Å3. Selected physicochemical parameters of the compounds were studied. Pyroelectric properties of the compounds were found over a wide temperature range

Combinatorial approach towards synthesis of 2´,3´- dideoxynucleosides and enzyme-catalysed selective hydrolysis of diethyl acetamidomalonate and amides of polyacetocy aromatic carboxylic acid

507-512Seventeen noveI 3’-alkylthio-2’,3’-dideoxynucleosides have been synthesised by Michael-type addition of alkylthiols to an ,α,β-unsaturated hexose aldehyde, followed by acetylation, nucleoside coupling and deprotection. Based on these results, a general scheme for combinatorial synthesis of libraries of 3’-substituted 2’,3’-dideoxynucleosides has been proposed. Porcine pancreatic lipase (PPL) has been found to hydrolyse the amides of polyacetoxyaromatic carboxylic acids in a highly chemoselective fashion. The enzyme exclusively hydrolyses the ester group over the amide group. Hydrolysis of diethyl acetamidomalonate in phosphate buffer in the presence of α-chymotrypsin proceeds enantioselectively affording the (+)-monoacid