TY  - GEN
A1  - Rasovic, Aleksandar
A1  - Blagojevic, Vladimir
A1  - Baranac-Stojanovic, Marija
A1  - Kleinpeter, Erich
A1  - Markovic, Rade
A1  - Minic, Dragica M.
T1  - Quantification of the push–pull effect in 2-alkylidene-4-oxothiazolidines by using NMR spectral data and barriers to rotation around the C=C bond
N2  - Information about the strength of donor–acceptor interactions in push–pull alkenes is valuable, as this so-called “push–pull effect” influences their chemical reactivity and dynamic behaviour. In this paper, we discuss the applicability of NMR spectral data and barriers to rotation around the C[double bond, length as m-dash]C double bond to quantify the push–pull effect in biologically important 2-alkylidene-4-oxothiazolidines. While olefinic proton chemical shifts and differences in 13C NMR chemical shifts of the two carbons constituting the C[double bond, length as m-dash]C double bond fail to give the correct trend in the electron withdrawing ability of the substituents attached to the exocyclic carbon of the double bond, barriers to rotation prove to be a reliable quantity in providing information about the extent of donor–acceptor interactions in the push–pull systems studied. In particular all relevant kinetic data, that is the Arrhenius parameters (apparent activation energy Ea and frequency factor A) and activation parameters (ΔS‡, ΔH‡ and ΔG‡), were determined from the data of the experimentally studied configurational isomerization of (E)-9a. These results were compared to previously published related data for other two compounds, (Z)-1b and (2E,5Z)-7, showing that experimentally determined ΔG‡ values are a good indicator of the strength of push–pull character. Theoretical calculations of the rotational barriers of eight selected derivatives excellently correlate with the calculated C[double bond, length as m-dash]C bond lengths and corroborate the applicability of ΔG‡ for estimation of the strength of the push–pull effect in these and related systems.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 322 
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-394523
SP  - 6364
EP  - 6373
ER  - 
TY  - JOUR
A1  - Neumann, Bernhard
A1  - Horstkemper, Marianne
A1  - Krüger, Wolfgang
A1  - Wilkens, Martin
A1  - Bohlen, Andreas
A1  - Frübing, Peter
A1  - Wegener, Michael
A1  - Scheff, Ullrich
A1  - Neher, Dieter
A1  - Brehmer, Ludwig
A1  - Kleinpeter, Erich
A1  - Wolf, Gunter
A1  - Koetz, Joachim
A1  - Peter, Martin G.
A1  - Senkbeil, Sigrid
A1  - Meyer, Till
T1  - Portal = Im Trend: Physiker und Chemiker erforschen "Soft Matter"
BT  - Die Potsdamer Universitätszeitung
N2  - Aus dem Inhalt:
Im Trend: Physiker und Chemiker erforschen „Soft Matter“
-Brandenburger Netzwerk für Existenzgründer erhält Förderung
-Universität leistet Beitrag zum Romantik-Jahr
-Musiksender MTV und Bryan Adams auf dem Campus
T3  - Portal: Das Potsdamer Universitätsmagazin - 06/2002 
Y1  - 2002
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-501441
SN  - 1618-6893
VL  - 2002
ER  - 
TY  - JOUR
A1  - Baier, Dieter
A1  - Soyez, Konrad
A1  - Streurs, Kerstin
A1  - Kaiser, Jürgen
A1  - Narodoslawski, Michael
A1  - Kamm, Birgit
A1  - Kromus, Stefan
A1  - Kamm, Michael
A1  - Zierke, Irene
A1  - Koller, Matthias
A1  - Hermann, Tim
A1  - Schmeer, Ernst
A1  - Thrän, Daniela
A1  - Kleinpeter, Erich
A1  - Starke, Ines
A1  - Holzberger, Anja
T1  - Umweltforschung für das Land Brandenburg
BT  - Projekt Ökotechnologie / Regenerative Energien
JF  - Brandenburgische Umwelt-Berichte : BUB ; Schriftenreihe der Mathematisch-Naturwissenschaftlichen Fakultät der Universität Potsdam
N2  - BAIER, D.; SOYEZ, K.: Dekontamination von Altholz ; BAIER, D. et al.: Untersuchungen zur Kompostierbarkeit von paraffinbeschichteten Verpackungsmaterialien ; KAISER, J.; SOYEZ, K.: Zum Wasser- und Wärmehaushalt des Intensivrotteprozesses der mechanisch-biologischen Abfallbehandlung ; KAMM, B. et al.: Green Biorefinery - European Network for the Implementation of Biorefineries (NIB) ; KAMM, B. et al.: Grüne Bioraffinerie Brandenburg ; KOLLER, M.; HERMANN, T.: Entscheidungshilfen für die ökologische Optimierung der Entsorgung häuslicher Restabfälle ; SCHMEER, E.: Solarthermie 2000 ; SCHMEER, E.: Forschungs- und Demonstrationsanlage zur Photovoltaik ; SOYEZ, K. et al.: Verbundvorhaben "Mechanisch-biologische Restabfallbehandlung" ; STARKE, I. et al.: Carbohydrates as raw material from a Green BioRefinery
Y1  - 2000
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-3831
SN  - 1434-2375
SN  - 1611-9339
VL  - 8
SP  - 230
EP  - 301
ER  -