Articles

Synthesis and catalytic properties in olefin epoxidation of chiral oxazoline dioxomolybdenum(VI) complexes. Abstract Dioxomolybdenum(VI) complexes with the general formula [MoO2X2(N,N)] (X = Cl, OSiPh3) containing a chiral bidentate oxazoline ligand (N,N = 2,2′-bis[(4S)-4-benzyl-2-oxazoline]) have been prepared and characterised by 1H NMR, IR spectroscopy and thermogravimetric analysis. The bis(chloro) complex was heterogenised in the ordered mesoporous…

Development of novel brush-type chiral stationary phases based on terpenoid selectors: HPLC evaluation and theoretical investigation of enantioselective binding interactions. Abstract The terpenoid chiral selectors dehydroabietic acid, 12,14-dinitrodehydroabietic acid and friedelin have been covalently linked to silica gel yielding three chiral stationary phases CSP 1, CSP 2 and CSP 3, respectively. The enantiodiscriminating capability of…

Computationally-Assisted Approach to the Vibrational Spectra of Molecular Crystals: Study of Hydrogen-bonding and Pseudo-Polymorphism. Abstract A new computationally-assisted methodology (PiMM), which accounts for the effects of intermolecular interactions in the crystal, is applied to the complete assignment of the Raman and infrared vibrational spectra of room temperature forms of crystalline caffeine, theobromine, and theophylline. The…

Dioxomolybdenum(VI) modified mesoporous materials for the catalytic epoxidation of olefins Abstract Organic–inorganic hybrid heterogeneous catalyst systems were synthesized by the reaction of the dioxomolybdenum(VI) complex MoO2Cl2(THF)2 with the mesoporous silica MCM-41 functionalized with a pyrazolylpyridine ligand (MCM-41-PP). Two catalysts were prepared, one of which involved the postsynthesis trimethylsilylation of MCM-41-PP to remove the residual surface…

b-Cyclodextrin inclusion of europium(III) tris(b-diketonate)-bipyridine. Abstract The adduct Eu(NTA)3 · bipy was prepared by the reaction of Eu(NTA)3 · 2H2O with 2,2′-bipyridine in a 1:1 ratio in chloroform [NTA = 1-(2-naphthoyl)-3,3,3-trifluoroacetonate]. Recrystallization of the complex from a chloroform/diethyl ether solvent mixture gave crystals suitable for X-ray diffraction. The structure contained chloroform molecules in partially occupied…