TY  - JOUR
AU  - Minić, Dragica M.
AU  - Cekic, I.
AU  - Pastor, Ferenc
AU  - Jovanovic, V.
AU  - Marković, R.
PY  - 2007
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/922
AB  - This study demonstrates the electrochemical activity of selected 2-alkylidene-4-oxothiazolidine compounds containing different substituents at the C5-position on the Pt-electrode in 0.1 M TBAHFP + MeCN in the potential range from -2 V to 2 V. The mechanism of electrode processes is discussed. It is shown that a chemical step is involved in irreversible electrochemical processes. The effect of the substituent at the C5-position on reduction and oxidation potentials is also noted. The regions of a linear dependence of the current peak on the concentration of the compounds examined are determined.
PB  - Maik Nauka/Interperiodica/Springer, New York
T2  - Russian Journal of Physical Chemistry A
T1  - Electrochemical behavior of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives studied by cyclic voltammetry
VL  - 81
IS  - 9
SP  - 1458
EP  - 1462
DO  - 10.1134/S003602440709021X
ER  - 

@article{
author = "Minić, Dragica M. and Cekic, I. and Pastor, Ferenc and Jovanovic, V. and Marković, R.",
year = "2007",
abstract = "This study demonstrates the electrochemical activity of selected 2-alkylidene-4-oxothiazolidine compounds containing different substituents at the C5-position on the Pt-electrode in 0.1 M TBAHFP + MeCN in the potential range from -2 V to 2 V. The mechanism of electrode processes is discussed. It is shown that a chemical step is involved in irreversible electrochemical processes. The effect of the substituent at the C5-position on reduction and oxidation potentials is also noted. The regions of a linear dependence of the current peak on the concentration of the compounds examined are determined.",
publisher = "Maik Nauka/Interperiodica/Springer, New York",
journal = "Russian Journal of Physical Chemistry A",
title = "Electrochemical behavior of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives studied by cyclic voltammetry",
volume = "81",
number = "9",
pages = "1458-1462",
doi = "10.1134/S003602440709021X"
}

Minić, D. M., Cekic, I., Pastor, F., Jovanovic, V.,& Marković, R.. (2007). Electrochemical behavior of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives studied by cyclic voltammetry. in Russian Journal of Physical Chemistry A
Maik Nauka/Interperiodica/Springer, New York., 81(9), 1458-1462.
https://doi.org/10.1134/S003602440709021X

Minić DM, Cekic I, Pastor F, Jovanovic V, Marković R. Electrochemical behavior of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives studied by cyclic voltammetry. in Russian Journal of Physical Chemistry A. 2007;81(9):1458-1462.
doi:10.1134/S003602440709021X .

Minić, Dragica M., Cekic, I., Pastor, Ferenc, Jovanovic, V., Marković, R., "Electrochemical behavior of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives studied by cyclic voltammetry" in Russian Journal of Physical Chemistry A, 81, no. 9 (2007):1458-1462,
https://doi.org/10.1134/S003602440709021X . .

TY  - JOUR
AU  - Marković, R.
AU  - Baranac-Stojanović, Marija
AU  - Juranić, N.
AU  - Macura, S.
AU  - Cekic, I.
AU  - Minić, Dragica M.
PY  - 2006
UR  - https://cherry.chem.bg.ac.rs/handle/123456789/813
AB  - The rotational barriers between the configurational isomers of two structurally related push-pull 4-oxothiazolidines, differing in the number of exocyclic C=C bonds, have been determined by dynamic H-1 NMR spectroscopy. The equilibrium mixture of (5-ethoxy-carbonylmethyl-4-oxothiazolidin-2-ylidene)-1-phenylethanone (1a) in CDCl3 at room temperature to 333 K consists of the E- and Z-isomers which are separated by an energy barrier Delta G(#) 98.5 kJ/mol (at 298 K). The variable-temperature H-1 NMR data for the isomerization of ethyl (5-ethoxycarbonylmethylidene-4-oxothiazolidin-2-ylidene)ethanoate (2b) in DMSO-d(6), possessing the two exocyclic C=C bonds at the C(2)- and C(5)-positions, indicate that the rotational barrier Delta G(#) separating the (2E,5Z)-2b and (2Z,5Z)-2b isomers is 100.2 kJ/mol (at 298 K). In a polar solvent-dependent equilibrium the major (2Z,5Z)-form ( gt  90%) is stabilized by the intermolecular resonance-assisted hydrogen bonding and strong 1,5-type (SO)-O-... interactions within the S-C=C-C=O entity. The C-13 NMR Delta delta(C(2)C(2')) values, ranging from 58 to 69 ppm in 1a-d and 49-58 ppm in 2a-d, correlate with the degree of the push-pull character of the exocyclic C(2)=C(2') bond, which increases with the electron withdrawing ability of the substituents at the vinylic C(2') position in the following order: COPh similar to COEt  gt  CONHPh  gt  CONHCH2CH2Ph. The decrease of the Delta delta(C(2)C(2')) values in 2a-d has been discussed for the first time in terms of an estimation of the electron donor capacity of the -S- fragment on the polarization of the C=C bonds. (c) 2006 Elsevier B.V. All rights reserved.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Molecular Structure
T1  - H-1 NMR dynamic study of thermal Z/E isomerization of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives: Barriers to rotation about C=C bond
VL  - 800
IS  - 1-3
SP  - 85
EP  - 92
DO  - 10.1016/j.molstruc.2006.03.075
ER  - 

@article{
author = "Marković, R. and Baranac-Stojanović, Marija and Juranić, N. and Macura, S. and Cekic, I. and Minić, Dragica M.",
year = "2006",
abstract = "The rotational barriers between the configurational isomers of two structurally related push-pull 4-oxothiazolidines, differing in the number of exocyclic C=C bonds, have been determined by dynamic H-1 NMR spectroscopy. The equilibrium mixture of (5-ethoxy-carbonylmethyl-4-oxothiazolidin-2-ylidene)-1-phenylethanone (1a) in CDCl3 at room temperature to 333 K consists of the E- and Z-isomers which are separated by an energy barrier Delta G(#) 98.5 kJ/mol (at 298 K). The variable-temperature H-1 NMR data for the isomerization of ethyl (5-ethoxycarbonylmethylidene-4-oxothiazolidin-2-ylidene)ethanoate (2b) in DMSO-d(6), possessing the two exocyclic C=C bonds at the C(2)- and C(5)-positions, indicate that the rotational barrier Delta G(#) separating the (2E,5Z)-2b and (2Z,5Z)-2b isomers is 100.2 kJ/mol (at 298 K). In a polar solvent-dependent equilibrium the major (2Z,5Z)-form ( gt  90%) is stabilized by the intermolecular resonance-assisted hydrogen bonding and strong 1,5-type (SO)-O-... interactions within the S-C=C-C=O entity. The C-13 NMR Delta delta(C(2)C(2')) values, ranging from 58 to 69 ppm in 1a-d and 49-58 ppm in 2a-d, correlate with the degree of the push-pull character of the exocyclic C(2)=C(2') bond, which increases with the electron withdrawing ability of the substituents at the vinylic C(2') position in the following order: COPh similar to COEt  gt  CONHPh  gt  CONHCH2CH2Ph. The decrease of the Delta delta(C(2)C(2')) values in 2a-d has been discussed for the first time in terms of an estimation of the electron donor capacity of the -S- fragment on the polarization of the C=C bonds. (c) 2006 Elsevier B.V. All rights reserved.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Molecular Structure",
title = "H-1 NMR dynamic study of thermal Z/E isomerization of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives: Barriers to rotation about C=C bond",
volume = "800",
number = "1-3",
pages = "85-92",
doi = "10.1016/j.molstruc.2006.03.075"
}

Marković, R., Baranac-Stojanović, M., Juranić, N., Macura, S., Cekic, I.,& Minić, D. M.. (2006). H-1 NMR dynamic study of thermal Z/E isomerization of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives: Barriers to rotation about C=C bond. in Journal of Molecular Structure
Elsevier Science Bv, Amsterdam., 800(1-3), 85-92.
https://doi.org/10.1016/j.molstruc.2006.03.075

Marković R, Baranac-Stojanović M, Juranić N, Macura S, Cekic I, Minić DM. H-1 NMR dynamic study of thermal Z/E isomerization of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives: Barriers to rotation about C=C bond. in Journal of Molecular Structure. 2006;800(1-3):85-92.
doi:10.1016/j.molstruc.2006.03.075 .

Marković, R., Baranac-Stojanović, Marija, Juranić, N., Macura, S., Cekic, I., Minić, Dragica M., "H-1 NMR dynamic study of thermal Z/E isomerization of 5-substituted 2-alkylidene-4-oxothiazolidine derivatives: Barriers to rotation about C=C bond" in Journal of Molecular Structure, 800, no. 1-3 (2006):85-92,
https://doi.org/10.1016/j.molstruc.2006.03.075 . .