TY  - BOOK
ED  - Duvinage, Brigitte
T1  - Einfache Experimente
Y1  - 1999
ER  - 
TY  - BOOK
ED  - Barthel, Helmut
ED  - Henning, Helmut
ED  - Kleinpeter, Erich
ED  - Ludwig, Eberhard
ED  - Uhlemann, Erhard
ED  - Barthel, Helmut
T1  - Chemie : Lehrbuch für die Sekundarstufe II ; Gymnasium/Gesamtschule ; Allgemeine Chemie, organische Chemie
Y1  - 1995
PB  - Volk und Wissen
CY  - Berlin
ER  - 
TY  - BOOK
ED  - Barthel, Helmut
ED  - Henning, Helmut
ED  - Kleinpeter, Erich
ED  - Ludwig, Eberhard
ED  - Uhlemann, Erhard
ED  - Barthel, Helmut
T1  - Chemie : Lehrbuch für die Sekundarstufe II ; Gymnasium/Gesamtschule ; Allgemeine Chemie, organische Chemie ; Lösungen
Y1  - 1995
PB  - Volk und Wissen
CY  - Berlin
ER  - 
TY  - JOUR
T1  - DFT-GIAO-NBO and 13C NMR study of the delta-syn-axial effect in 2,4-disubstituted adamantanes
N2  - Six groups of diastereomeric 2,4-disubstituted adamantanes were studied with DFT-GIAO-NBO (natural orbital analysis) methods. The calculated 13C chemical shifts reproduce well the experimental data. It was found that among all diastereomers, those bearing substituents in -syn-axial positions showed the largest overall deshielding, i.e. the sum of all 13C chemical shifts [;;(13C)] was the greatest and also had the highest delocalization contribution to the molecular energy evaluated with NBO. The higher delocalization energy is proposed to be the origin of the deshielding -syn-axial effect
Y1  - 2008
UR  - http://onlinelibrary.wiley.com/doi/10.1002/mrc.2333/pdf
U6  - https://doi.org/10.1002/Mrc.2333
SN  - 0749-1581
ER  - 
TY  - JOUR
T1  - Synthesis and conformational analysis of phenyl-substituted 1,3,2-oxazaphosphino[4,3-a]- and 1,2,3- oxathiazino[4,3-a]isoquinolines
N2  - Through the ring closures of tetrahydroisoquinoline 1,3-amino alcohols bearing a phenyl group in the side- chain, diastereomers of novel 1- or 2-phenyl-substituted 1,3,2-oxazaphosphino[4,3-a]isoquinoline 4-oxides, and 1,2,3- oxathiazino[4,3-a]isoquinoline 4-oxides and 4,4-dioxides were prepared. NMR analysis and DFT calculations on the prepared tetrahydroisoquinoline-condensed 1,2,3-heterocycles revealed that their conformational equilibria of cis1-trans-cis2 type are influenced by the relative configuration of P-4 in the 1,3,2-oxazaphosphinanes, and by the position of the phenyl group in the 1,2,3-oxathiazines.
Y1  - 2008
ER  -