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Zofia Dega-Szafran

Researcher at Adam Mickiewicz University in Poznań

Publications -  260
Citations -  3177

Zofia Dega-Szafran is an academic researcher from Adam Mickiewicz University in Poznań. The author has contributed to research in topics: Hydrogen bond & Molecule. The author has an hindex of 25, co-authored 259 publications receiving 3077 citations. Previous affiliations of Zofia Dega-Szafran include University of Florida & Polish Academy of Sciences.

Papers
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Journal ArticleDOI

Kinetics and mechanism of nucleophilic displacements with heterocycles as leaving groups. 26. Collisionally activated dissociation of N-alkylpyridinium cations to pyridine and alkyl cations in the gas phase

Alan R. Katritzky, +3 more
- 01 Mar 1990 - 
TL;DR: La dissociation activee par collisions de Nalkylpyridiniums en phase gazeuse donne la pyridine et les carbocations correspondants as discussed by the authors.
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Electrostatic Interactions and Conformations of Zwitterionic Pyridinium Alkanoates

Magdalena Szafran, +6 more
- 11 Apr 1998 - 
TL;DR: In this article, flexible zwitterionic ω-pyridinium alkanoates (PBn) with n methylene units in the tether and their hydrates and hydrochlorides are studied in the solid state by X-ray diffraction, in aqueous solution by FT-IR and 1H,13C, and 14N NMR spectroscopies, and in the gas phase by PM3, SAM1, and DFT calculations.
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UV, 1H and 13C NMR spectra, and AM1 studies of protonation of aminopyridines

Zofia Dega-Szafran, +3 more
- 16 Jun 1994 - 
TL;DR: In this paper, the effect of single and double protonation on the NMR spectra of 2-, 3-, and 4-aminopyridines and their N-methyl and N,N-dimethyl derivatives was investigated.
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Strong hydrogen bonds in 1:1 and 2:1 complexes of pyridine betaine with strong acids☆

Zofia Dega-Szafran, +4 more
- 16 Jun 1994 - 
TL;DR: The crystal structure of bis(pyridine betaine) hydrochloride-d 1 monohydrate-d 2 has been determined by X-ray analysis as mentioned in this paper, where the carboxylate groups of a pair of pyridine betsaine molecules are bridged by a deuteron to form a centro-symmetric dimer featuring a very strong hydrogen bond of length 2.444(4) A.
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Chlorine-35 nuclear quadrupole resonance and infrared spectroscopic studies of hydrogen bonding in complexes of dichloroacetic acid with nitrogen and oxygen bases: correlation of spectroscopic properties with proton affinity and aqueous pKa

B. Nogaj, +8 more
- 01 Feb 1990 - 
TL;DR: Proton affinities (PA) calculated for 57 compounds by the AM1 method, show no general overall correlation with pK a values, but individual classes of bases displayed significant trends.