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Your search keyword '"Ottó Berkesi"' showing total 2 results
Start Over Author "Ottó Berkesi" Publisher royal society of chemistry (rsc)
2 results on '"Ottó Berkesi"'

1. Speciation and structure of tin(<scp>ii</scp>) in hyper-alkaline aqueous solution

Author

Zoltán Homonnay, Gábor Peintler, Ingmar Persson, Ernő Kuzmann, Pál Sipos, Éva G. Bajnóczi, György Dombi, István Pálinkó, Eszter Czeglédi, Peter Forgo, Ottó Berkesi, and Szabolcs Bálint

Subjects
Aqueous solution, Extended X-ray absorption fine structure, Potentiometric titration, Analytical chemistry, Water, chemistry.chemical_element, Spectrum Analysis, Raman, Inorganic Chemistry, Bond length, Spectroscopy, Mossbauer, chemistry.chemical_compound, symbols.namesake, X-Ray Absorption Spectroscopy, chemistry, Coordination Complexes, Tin, Mössbauer spectroscopy, Hydroxides, symbols, Quantum Theory, Thermodynamics, Hydroxide, Raman spectroscopy
Abstract

The identity of the predominating tin(II)-hydroxide complex formed in hyper-alkaline aqueous solutions (0.2

Published
2014
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2. Hydrogen bonding interactions of benzylidene type Schiff bases studied by vibrational spectroscopic and computational methods

Author

Tamás Németh, István Pálinkó, Tamás Körtvélyesi, Csaba Hetényi, and Ottó Berkesi

Subjects
Hydrogen bond, Imine, Intermolecular force, General Physics and Astronomy, Aromaticity, chemistry.chemical_compound, Crystallography, Molecular geometry, chemistry, Computational chemistry, Ab initio quantum chemistry methods, Intramolecular force, Molecule, Physical and Theoretical Chemistry
Abstract

The structural features of four benzylidene type Schiff bases [(E)-benzaldehyde-N-phenyl imine, (A) (E)-2-hydroxybenzaldehyde-N-phenyl imine (B) (E)-benzaldehyde-N-2-hydroxyphenyl imine (C) (E)-2-hydroxybenzaldehyde-N-2-hydroxyphenyl imine (D)] were studied by FT-IR spectroscopy in solution, photoacoustic and Raman spectroscopies in the solid state and quantum chemical calculations. It was found that molecule D dimerised in the solid state with concomitant loss of aromaticity in the benzylidene ring. Beside the intermolecular C=O...HO hydrogen bonds, intramolecular N-H...C=O hydrogen bonds could be found experimentally as well as computationally. Spectra taken in solution and ab initio quantum chemical calculation helped to identify hydrogen bonding interactions occurring for compounds B and C. Intramolecular OH...N hydrogen bond predominated in molecule B, while this interaction, although it existed, was weaker.

Published
2003
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