A novel platinum(II) complex with 2-hydroxy-6-methylpyridine (Hmhp), trans-[PtCl2(dmso)(Hmhp)]·H2O, crystallizes in the space group P 21/n with a = 11.5505(1) Å, b = 8.9467(1) Å, c = 14.6047(2) Å and β = 112.3919(6)°. The platinum ion is in the expected square-planar environment. The 2-hydroxy-6-methylpyridine ligand is coordinated to the metal ion in a monodentate manner via nitrogen. The plane of the aromatic ligand is nearly perpendicular to the platinum coordination plane. The Pt(II) ion is shielded with pyridine ortho substituents above and below the square coordination plane of platinum. Hydrogen bonding between the complex molecules and the H2O molecules of crystallization produces infinite two-dimensional layers. Weak intermolecular interactions of the C–H···Cl type link the layers into a three-dimensional structure. A novel platinum(II) complex with 2-hydroxy-6-methylpyridine (Hmhp), trans-[PtCl2(dmso)(Hmhp)]·H2O, crystallizes in the space group P 21/n with a = 11.5505(1) Å, b = 8.9467(1) Å, c = 14.6047(2) Å and β = 112.3919(6)°. The platinum ion is in the expected square-planar environment. The 2-hydroxy-6-methylpyridine ligand is coordinated to the metal ion in a monodentate manner via nitrogen. The plane of the aromatic ligand is nearly perpendicular to the platinum coordination plane. The Pt(II) ion is shielded with pyridine ortho substituents above and below the square coordination plane of platinum. Hydrogen bonding between the complex molecules and the H2O molecules of crystallization produces infinite two-dimensional layers. Weak intermolecular interactions of the C–H···Cl type link the layers into a three-dimensional structure. A novel platinum(II) complex with 2-hydroxy-6-methylpyridine (Hmhp), trans-[PtCl2(dmso)(Hmhp)]·H2O, crystallizes in the space group P 21/n with a = 11.5505(1) Å, b = 8.9467(1) Å, c = 14.6047(2) Å and β = 112.3919(6)°. The platinum ion is in the expected square-planar environment. The 2-hydroxy-6-methylpyridine ligand is coordinated to the metal ion in a monodentate manner via nitrogen. The plane of the aromatic ligand is nearly perpendicular to the platinum coordination plane. The Pt(II) ion is shielded with pyridine ortho substituents above and below the square coordination plane of platinum. Hydrogen bonding between the complex molecules and the H2O molecules of crystallization produces infinite two-dimensional layers. Weak intermolecular interactions of the C–H···Cl type link the layers into a three-dimensional structure.
COBISS.SI-ID: 1536352707
Leachate from a closed landfill used for co-disposal of municipal and tannery waste was submitted to coagulation treatment, air stripping, adsorption on granular activated carbon, and Fenton oxidation with the aim to reduce toxicity of the leachate. Optimal operational conditions for each process were identified. The performance of the treatment was monitored by determination of organic matter (COD, DOC, BOD5), inorganic components (N-NH4 +, Cl−, alkalinity, metals), organic compounds (BTEX, PAHs, PCBs, OCPs) while changes in toxicity were followed by multiple toxicity tests.
COBISS.SI-ID: 1536385219
Cyclic and acyclic ketones were selectively converted to gem-dihydroperoxides in 72-99% yield with 30% aq. hydrogen peroxide by azeotropic distillation of water from the reaction mixture without any catalyst. The reactions were more selective as with 100% H2O2 and due to neutral conditions also less stable products could be obtained.
COBISS.SI-ID: 28856871
Thiols were functionalized with PhNHSCF3 in the presence of acidic promoter. Aril-, benzyl- and alkyl-substituted thiols were converted into trifluoromethyl disulfides in good yields. The heterocyclic thiols were converted into trifluoromethyl disulfides as well; however, the yields were somewhat lower. Some of the sterically hindered- and biologically important thiols were successfully functionalized. Benzeneselenol was transformed into phenylselenyl trifluoromethyl sulfide. PhNHSCF3 was demonstrated to be a suitable reagent for conversion of sodium sulfinates into trifluoromethyl thiosulfonates. A relative reactivity of the aryl-substituted thiols was determined, and the Hammett reaction constant ρ = –1.65 was obtained with a good correlation (r2 ) 0.95), thus suggesting formation of a positive charge in the transition state, which was confirmed with the quantum chemical calculations, too.
COBISS.SI-ID: 1536347331
Alkaline earth aluminates with the overall nominal compositions Mg0.5Sr0.5Al2O4 (MSA), Ca0.5Mg0.5Al2O4 (CMA) and Ca0.5Sr0.5Al2O4(CSA) doped with 0.5 mol% of Eu2+ and 0.25 mol% of Nd3+ ions were obtained by a modified aqueous sol-gel method and annealed in a reducing atmosphere at 900, 1000, 1100 and 1300 °C. The sample structures were investigated by XRD. Solid solubility was only confirmed for the CSA samples. UV-excited luminescence was observed in the blue region (l = 440 nm) in the samples of CMA containing the monoclinic CaAl2O4 phase and in the green region (l = 512 nm) in the samples of MSA containing hexagonal or monoclinic phases of SrAl2O4. The CSA samples, besides the blue region, exhibited an extended shoulder in the green region, which proved the existence of some pure strontium phases. Co-doped Nd3+ ions did not affect the wavelength of the emitted light, but the persistent luminescence at room temperature was greatly extended with respect to the aluminates doped with Eu2+ ions only.
COBISS.SI-ID: 1536349635