TY  - JOUR
AU  - Milosavljević, Milutin
AU  - Đorđević, Siniša
AU  - Ražić, Slavica
PY  - 2007
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/925
AB  - In this paper the kinetics of the reaction between sodium ethyl xanthogenacetate (NaEtXAc) and six amines was investigated. In order to determine the wavelength for following the reaction, the influence of the structures of reactants on the absorption (at 280 nm) was investigated. The values of rate constants for selected amines, at different temperatures were determined. It was confirmed that the reactions investigated are of the second-order. On the basis of the reaction rate constants and at the different temperatures, several thermodynamic parameters were calculated such as the energy of activation, the frequency factor, the activation entropy, Gibb's free-energy of the activation and the activation enthalpy. By evaluating the obtained results some assumptions that refer to the reaction mechanisms of nucleophilic attack of amine on the thiocarbonyl carbon, as well as forming of an activated complex as a critical step, were made.
PB  - Savez hemijskih inženjera, Beograd
T2  - CICEQ - Chemical Industry and Chemical Engineering Quarterly
T1  - Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine
VL  - 13
IS  - 4
SP  - 175
EP  - 178
DO  - 10.2298/CICEQ0704175M
ER  - 

@article{
author = "Milosavljević, Milutin and Đorđević, Siniša and Ražić, Slavica",
year = "2007",
abstract = "In this paper the kinetics of the reaction between sodium ethyl xanthogenacetate (NaEtXAc) and six amines was investigated. In order to determine the wavelength for following the reaction, the influence of the structures of reactants on the absorption (at 280 nm) was investigated. The values of rate constants for selected amines, at different temperatures were determined. It was confirmed that the reactions investigated are of the second-order. On the basis of the reaction rate constants and at the different temperatures, several thermodynamic parameters were calculated such as the energy of activation, the frequency factor, the activation entropy, Gibb's free-energy of the activation and the activation enthalpy. By evaluating the obtained results some assumptions that refer to the reaction mechanisms of nucleophilic attack of amine on the thiocarbonyl carbon, as well as forming of an activated complex as a critical step, were made.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "CICEQ - Chemical Industry and Chemical Engineering Quarterly",
title = "Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine",
volume = "13",
number = "4",
pages = "175-178",
doi = "10.2298/CICEQ0704175M"
}

Milosavljević, M., Đorđević, S.,& Ražić, S.. (2007). Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine. in CICEQ - Chemical Industry and Chemical Engineering Quarterly
Savez hemijskih inženjera, Beograd., 13(4), 175-178.
https://doi.org/10.2298/CICEQ0704175M

Milosavljević M, Đorđević S, Ražić S. Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine. in CICEQ - Chemical Industry and Chemical Engineering Quarterly. 2007;13(4):175-178.
doi:10.2298/CICEQ0704175M .

Milosavljević, Milutin, Đorđević, Siniša, Ražić, Slavica, "Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine" in CICEQ - Chemical Industry and Chemical Engineering Quarterly, 13, no. 4 (2007):175-178,
https://doi.org/10.2298/CICEQ0704175M . .

TY  - JOUR
AU  - Milosavljević, Milutin
AU  - Marinković, Aleksandar
AU  - Ceković, Boban
AU  - Ražić, Slavica
PY  - 2007
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1002
AB  - The reaction kinetics of the synthesis of sodium ethyl xanthogeneacetate from potassium ethylxanthogenate and sodium chloroacetate in distilled water as the reaction medium at 25, 30, 35 and 40°C, were investigated. The obtained reaction mixture was a complex system which demanded the use of two methods for the kinetic measurements. The reaction was followed using the conductrometric and UV/Vis spectrophotometric method with equimolar initial concentrations of the reactants and under pseudo-first order conditions with respect to one of the reactants. The rate constants of the pseudo-first order and second order reactions were calculated from the data. On the basis of the reaction constants, the activation parameters were calculated and are discussed.
AB  - Ispitivana je kinetika reakcije sinteze natrijum-etil-ksantogen-acetata iz kalijum-etil-ksantogenata i natrijum-hloracetata u destilovanoj vodi kao reakcionom medijumu i temperaturama 25, 30, 35 i 40°C. Reakciona smeša je kompleksan sistem koji je zahtevao korišćenje dve metode za kinetička merenja. Reakcije su praćene korišćenjem spektrofotometrijske i konduktometrijske metode pri ekvimolarnim početnim koncentracijama reaktanata kao i pri uslovima reakcija pseudo-prvog reda u odnosu na jedan od reaktanata. Reakcione konstante pseudo-prvog reda i drugog reda izračunate su na osnovu kinetičkih podataka. Na osnovu reakcionih konstanti izračunati su i diskutovani takođe i aktivacioni parametri.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Kinetic study of the reaction between sodium chloroacetate and potassium ethylxanthogenate
T1  - Kinetička ispitivanja reakcije između natrijum-hloracetata i kalijum-etil-ksantata
VL  - 72
IS  - 2
SP  - 89
EP  - 100
DO  - 10.2298/JSC0702089M
ER  - 

@article{
author = "Milosavljević, Milutin and Marinković, Aleksandar and Ceković, Boban and Ražić, Slavica",
year = "2007",
abstract = "The reaction kinetics of the synthesis of sodium ethyl xanthogeneacetate from potassium ethylxanthogenate and sodium chloroacetate in distilled water as the reaction medium at 25, 30, 35 and 40°C, were investigated. The obtained reaction mixture was a complex system which demanded the use of two methods for the kinetic measurements. The reaction was followed using the conductrometric and UV/Vis spectrophotometric method with equimolar initial concentrations of the reactants and under pseudo-first order conditions with respect to one of the reactants. The rate constants of the pseudo-first order and second order reactions were calculated from the data. On the basis of the reaction constants, the activation parameters were calculated and are discussed., Ispitivana je kinetika reakcije sinteze natrijum-etil-ksantogen-acetata iz kalijum-etil-ksantogenata i natrijum-hloracetata u destilovanoj vodi kao reakcionom medijumu i temperaturama 25, 30, 35 i 40°C. Reakciona smeša je kompleksan sistem koji je zahtevao korišćenje dve metode za kinetička merenja. Reakcije su praćene korišćenjem spektrofotometrijske i konduktometrijske metode pri ekvimolarnim početnim koncentracijama reaktanata kao i pri uslovima reakcija pseudo-prvog reda u odnosu na jedan od reaktanata. Reakcione konstante pseudo-prvog reda i drugog reda izračunate su na osnovu kinetičkih podataka. Na osnovu reakcionih konstanti izračunati su i diskutovani takođe i aktivacioni parametri.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Kinetic study of the reaction between sodium chloroacetate and potassium ethylxanthogenate, Kinetička ispitivanja reakcije između natrijum-hloracetata i kalijum-etil-ksantata",
volume = "72",
number = "2",
pages = "89-100",
doi = "10.2298/JSC0702089M"
}

Milosavljević, M., Marinković, A., Ceković, B.,& Ražić, S.. (2007). Kinetic study of the reaction between sodium chloroacetate and potassium ethylxanthogenate. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 72(2), 89-100.
https://doi.org/10.2298/JSC0702089M

Milosavljević M, Marinković A, Ceković B, Ražić S. Kinetic study of the reaction between sodium chloroacetate and potassium ethylxanthogenate. in Journal of the Serbian Chemical Society. 2007;72(2):89-100.
doi:10.2298/JSC0702089M .

Milosavljević, Milutin, Marinković, Aleksandar, Ceković, Boban, Ražić, Slavica, "Kinetic study of the reaction between sodium chloroacetate and potassium ethylxanthogenate" in Journal of the Serbian Chemical Society, 72, no. 2 (2007):89-100,
https://doi.org/10.2298/JSC0702089M . .

TY  - JOUR
AU  - Milosavljević, Milutin
AU  - Đorđević, S.
AU  - Ražić, Slavica
PY  - 2005
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/663
AB  - In this work kinetics investigation of the reaction between sodium ethyl xantogenacetate (NaEtXAc) and primary as well as secondary alkylamines, for each pair NaEtXAc-amine, was performed. Firstly, in order to determine the wavelength for following the reaction, the influence of the structures of reactants on the absorption was investigated. Absorption of the system was followed at l = 280 nm. The values of rate constants for 16 selected amines, at the different temperatures, were determined. Considering high correlations coefficients, r > 0.988, it was confirmed that investigated reactions are the second-order. On the basis of reaction constants, at the different temperatures, several thermodynamic parameters were calculated such as the energy of activation Ea,, frequency factor A, the entropy of activation DS#2S, Gibbs’s free-energy of activation DG#2S and enthalpy of activation DH#2S. By evaluation of the obtained results some assumptions, that refer to the reaction mechanisms of nucleophilic attack of the amine on the thiocarbonyl carbon, were made. Following the proposed mechanism activated complex, as a critical step, is formed in this reaction.
AB  - U cilju ispitivanja kinetike reakcije natrijum-etilksantogenacetata (NaEtXAc) sa primarnim i sekundarnim alkilaminima za svaki par NaEtXAc-amin ispitan je prvo uticaj strukture ovih jedinjenja na apsorpciju kako bi se odredila talasna dužina na kojoj će se pratiti reakcija. Praćena je promena apsorpcije sistema na l= 280nm. Određene su konstante brzina reakcija za šesnaest odabranih amina na različitim temperaturama. Na osnovu visokih vrednosti korelacionih koeficijenata r > 0,988, potvrđeno je da ispitivane reakcije slede kinetiku reakcije drugog reda. Na osnovu vrednosti reakcionih konstanti na različitim temperaturama izračunato je nekoliko termodinamičkih parametara ispitivanih reakcija: energija aktivacije Ea, faktor učestanosti A, entropija aktivacije ΔS#25, Gibsova slobodna energija aktivacije ΔG#25 i entalpija aktivacije ΔH#25. Obradom dobijenih rezultata pretpostavljen je reakcioni mehanizam nukleofilnog napada amina na tiokarbonilni ugljenik, pri čemu kao limitirajući korak nastaje aktivirani kompleks.
PB  - Univerzitet u Nišu - Tehnološki fakultet, Leskovac
T2  - Zbornik radova Tehnološkog fakulteta, Leskovac
T1  - Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine
T1  - Ispitivanje kinetike reakcije natrijum-etilksantogenacetata i alkilamina
IS  - 15
SP  - 166
EP  - 176
UR  - https://hdl.handle.net/21.15107/rcub_farfar_663
ER  - 

@article{
author = "Milosavljević, Milutin and Đorđević, S. and Ražić, Slavica",
year = "2005",
abstract = "In this work kinetics investigation of the reaction between sodium ethyl xantogenacetate (NaEtXAc) and primary as well as secondary alkylamines, for each pair NaEtXAc-amine, was performed. Firstly, in order to determine the wavelength for following the reaction, the influence of the structures of reactants on the absorption was investigated. Absorption of the system was followed at l = 280 nm. The values of rate constants for 16 selected amines, at the different temperatures, were determined. Considering high correlations coefficients, r > 0.988, it was confirmed that investigated reactions are the second-order. On the basis of reaction constants, at the different temperatures, several thermodynamic parameters were calculated such as the energy of activation Ea,, frequency factor A, the entropy of activation DS#2S, Gibbs’s free-energy of activation DG#2S and enthalpy of activation DH#2S. By evaluation of the obtained results some assumptions, that refer to the reaction mechanisms of nucleophilic attack of the amine on the thiocarbonyl carbon, were made. Following the proposed mechanism activated complex, as a critical step, is formed in this reaction., U cilju ispitivanja kinetike reakcije natrijum-etilksantogenacetata (NaEtXAc) sa primarnim i sekundarnim alkilaminima za svaki par NaEtXAc-amin ispitan je prvo uticaj strukture ovih jedinjenja na apsorpciju kako bi se odredila talasna dužina na kojoj će se pratiti reakcija. Praćena je promena apsorpcije sistema na l= 280nm. Određene su konstante brzina reakcija za šesnaest odabranih amina na različitim temperaturama. Na osnovu visokih vrednosti korelacionih koeficijenata r > 0,988, potvrđeno je da ispitivane reakcije slede kinetiku reakcije drugog reda. Na osnovu vrednosti reakcionih konstanti na različitim temperaturama izračunato je nekoliko termodinamičkih parametara ispitivanih reakcija: energija aktivacije Ea, faktor učestanosti A, entropija aktivacije ΔS#25, Gibsova slobodna energija aktivacije ΔG#25 i entalpija aktivacije ΔH#25. Obradom dobijenih rezultata pretpostavljen je reakcioni mehanizam nukleofilnog napada amina na tiokarbonilni ugljenik, pri čemu kao limitirajući korak nastaje aktivirani kompleks.",
publisher = "Univerzitet u Nišu - Tehnološki fakultet, Leskovac",
journal = "Zbornik radova Tehnološkog fakulteta, Leskovac",
title = "Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine, Ispitivanje kinetike reakcije natrijum-etilksantogenacetata i alkilamina",
number = "15",
pages = "166-176",
url = "https://hdl.handle.net/21.15107/rcub_farfar_663"
}

Milosavljević, M., Đorđević, S.,& Ražić, S.. (2005). Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine. in Zbornik radova Tehnološkog fakulteta, Leskovac
Univerzitet u Nišu - Tehnološki fakultet, Leskovac.(15), 166-176.
https://hdl.handle.net/21.15107/rcub_farfar_663

Milosavljević M, Đorđević S, Ražić S. Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine. in Zbornik radova Tehnološkog fakulteta, Leskovac. 2005;(15):166-176.
https://hdl.handle.net/21.15107/rcub_farfar_663 .

Milosavljević, Milutin, Đorđević, S., Ražić, Slavica, "Kinetic study of the reaction between sodium ethyl xanthogenacetate and alkylamine" in Zbornik radova Tehnološkog fakulteta, Leskovac, no. 15 (2005):166-176,
https://hdl.handle.net/21.15107/rcub_farfar_663 .