YU-ISSN 0352-5139
J.Serb.Chem.Soc. Vol. 68, No. 6 (2003)
CONTENTS
Organic Chemistry
A. S. Veli~kovi}, M. S. Risti}, D. T. Veli~kovi}, S. N. Ili} and N. D. Miti}: The possibilities of the
application of some species of sage (Salvia L.) as auxiliaries in the treatment of some diseases
435
M. Carposu, L. Odochian, St. Dima. M. Dumitras and M. Petrovanu: Thermokinetic study of the
inactivation reaction of 1-methyl phthalazinium ylids
447
Inorganic Chemistry
R. N. Prasad and N. Gupta: Termplate synthesis of Mn(II) complexes of tetraaazamacrocycles derived from
diaminoalkanes and 3,4-hexanedione or benzil
455
M. G. Abd El Wahed: Thermodynamic and structural studies of complexes of manganese(II), cobalt(II),
nickel(II) and copper(II) with aminofuropyridine carboxamide (Note)
463
D. Vu~ini}, I. Miljanovi}, A. Rosi} and P. Lati}: Effect of Na2O/SiO2 mole ratio on the crystal type of
zeolite synthesized from coal fly ash
471
Physical Chemistry
J. D. Jovanovi} and D. K. Grozdani}: Saturated-liquid heat capacity: new polynomial models and review of
the literature experimental data (Note)
479
Electrochemistry
V. Vojinovi}, S. Mentus and V. Komneni}: Thermodynamic and kinetic behavior of hydrogen electrode in
a solution of 0.5 M KClO4 in dimethyl sulphoxide
497
Materials
B. Matovi}, S. Bo{kovi} and M. Logar: Preparation of basalt-based glass ceramics
505
K. I. Popov, S. B. Krsti} and M. G. Pavlovi}: The critical apparent density for the free flow of copper
powder (Preliminary communication)
511
J.Serb.Chem.Soc. 68(6)435–445(2003)
UDC 635.74.004.14:615.85
JSCS – 3059
Original scientific paper
The possibilities of the application of some species of sage (Salvia L.) as auxiliaries in the treatment of
some diseases
ANA S. VELI^KOVI]1, MIHAILO S. RISTI]2, DRAGAN T. VELI^KOVI]3, STEVAN N. ILI]4 AND
NATA[A D. MITI]3
1Medical Center “Mo{a Pijade”, Department of General Practice, Rade Kon~ara St. 2, 16000 Leskovac,
2Institute for Medicinal Plants Research “Dr. Josif Pan~i}”, Tadeu{a Ko{}u{ka St. 1, 11000 Belgrade,
3AD “Zdravlje” Pharmaceutical and Chemical Industry, Vlajkova St. 199, 16000 Leskovac and 4Faculty of
Medicine, Bra}e Taskovi} St. 81, 18000 Ni{, Serbia and Montenegro
(Received 5 November 2002)
Abstract: The chemical composition of four essential oils of four species of sage (Salvia officinalis L.,
Salvia pratensis L., Salvia glutinosa L. and Salvia aethiopis L.) are examined by GC-FID and GC-MS
analysis. The presence of some components in the essential oil (mono- and sesquiterpene) determines the
pharmacological effects and therapeutical application of a plant species. Salvia officinalis L. gives the
highest yield of oil (1.1 %), while the lowest is in Salvia pratensis L. (0.1 %). The investigations included
the determination of the antimicrobic activities of the essential oils by the diffusion method and the oil of
Salvia pratensis L. proved to have the highest activity.
Keywords: diseases, therapy, auxiliaries, Salvia L., antimicrobial activity, essential oils, extracts.
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J.Serb.Chem. Soc. 68(6)447–453(2003)
UDC 66.021.4:547.852.7
JSCS – 3060
Original scientific paper
Thermokinetic study on the inactivation reactions of
1-methylphthalazinium ylids
MARIA CAPROÔU*, LUCIA ODOCHIAN*, ÔT. DIMA**, M. DUMITRAÔ* and MAGDA
PETROVANU*
*The “Al. I. Cuza” University, Faculty of Chemistry, Bd. Copou 11, Iasi 6600, Romania and
**The “Dunarea de jos” University, Galati, Romania
(Received 11 October 2002, revised 9 January 2003)
Abstract: The present paper consists in a thermokinetic study on the dimerization reactions of 1methylphthalazinium ylids with –NO2 (ylid 1) and, respectively, –O–CH3 (ylid 2) substituents in the p
position of the benzoyl radical bound to the ylidic carbanion. From experimental data, the reaction order
and rate constants have been calculated. The reaction order n = 2 confirmed the ylids’ dimerization
reactions, while the values of the rate constants, k2 = 3.093 ´10-2 L/mol s and, respectively, 2.16 ´ 10-1
L/mol s for the dimerization of ylids 1 and 2 made evident the higher reactivity of ylid 2 versus ylid 1. The
same conclusion is also supported by the results of the thermodynamic study based on the chemical affinity
of the two reactions, when Aodim,1 < Aodim,2.
Keywords: 1-methylphthalazinium ylids, dimerization, inactivation, thermokinetics (reaction order, rate
constants, chemical affinity).
REFERENCES
1. I. Zugr|vescu, M. Petrovanu, N-Ylid Chemistry, Mc Graw Hill, London 1976
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J.Serb.Chem.Soc. 68(6)455–461(2003)
UDC 547.21+547.639.1:542.913:543.4
JSCS – 3061
Original scientific paper
Template synthesis of Mn(II) complexes of tetraazamacrocycles derived from diaminoalkanes and 3,4hexanedione or benzil
RAGHU N. PRASAD and NITIN GUPTA
Department of Chemistry, University of Rajasthan, Jaipur-302 004, India
(e-mail: prasadraghunandan@yahoo.com)
(Received 31 October 2002, revised 8 January 2003)
Abstract: Template condensation of a-diketones, such as 3,4-hexanedione or benzil, with 1,ndiaminoalkanes (where n = 4, 5, 6, 7, 8, 9, 10 or 12) in the presence of Mn(II) resulted in the formation of
complexes of the type [MnL(NO3)]NO3 (where L = 16 to 32-membered macrocycle). These complexes
have been characterized by elemental analyses, conductances, magnetic measurements, as well as IR and
electronic spectra.
Keywords: macrocyclic complexes, manganese complexes, IR spectra, electronic spectra.
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J.Serb.Chem.Soc. 68(6)463–470(2003)
UDC 547.821+547.831:536.7.004.12
JSCS – 3062
Note
NOTE
Thermodynamic and structural studies of complexes of
manganese(II), cobalt(II), nickel(II) and copper(II) with aminofuropyridine carboxamide
M. G. ABD EL WAHED
Faculty of Science, Zagazig University, Zagazig, Egypt
(Received 11 September 2002, revised 27 January 2003)
Abstract: Complexes of Mn(II), Co(II), Ni(II) and Cu(II) with 2-aminofuro[3,2-b]pyridine-3-carboxamide
have been prepared. The stability constants of the formed complexes were determined at 20, 30, 40 and 50
ºC at a fixed ionic strength, I = 0.1 mol dm-3 (KCl). The values of the thermodynamic functions associated
with complex formation were calculated and analyzed in terms of electrostatic and non-electrostatic
components. The complexes were characterized with the help of chemical and spectral data.
Keywords: aminofuropyridine carboxamide, thermodynamic, conductometric, photometric, spectral
properties.
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J.Serb.Chem.Soc. 68(6)471–478(2003)
UDC 549.67+666.122.2/.362–492.2:542.913
JSCS – 3063
Original scientific paper
Effect of Na2O/SiO2 mole ratio on the crystal type of zeolite synthesized from coal fly ash
DU[ICA VU^INI]1,, IGOR MILJANOVI]1, ALEKSANDRA ROSI]1 and PREDRAG LAZI]1
1Faculty of Mining and Geology, Dju{ina 7, 11000 Belgrade, Serbia and Montenegro
(Received 11 September, revised 5 December 2002)
Abstract: Coal fly ash was modified to zeolitic materials by hydrothermal treatment at 90 ºC. The zeolite
synthesis was studied as a function of the mole ratio of Na2O/SiO2 in the reaction mixtures. The results
showed that NaP1 zeolite is obtained when the Na2O/SiO2 mole ratio was 0.7. Hydroxysodalite is the
dominant zeolite phase in modified fly ash treated with a higher Na2O concentration solution (Na2O/SiO2
= 1.3). The IR and XRD methods were used to determine the phases present in the starting sample and in
the zeolitic materials.
Keywords: coal fly ash, hydrothermal treatment, zeolitic materials.
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J.Serb.Chem.Soc. 68(6)479–495(2003)
UDC 66.011+536.412:517.538
JSCS – 3064
Note
NOTE
Saturated-liquid heat capacity: new polynomial models and review of the literature experimental data
JOVAN D. JOVANOVI] and DU[AN K. GROZDANI]
Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia and
Montenegro
(Received 18 December 2002)
Abstract: In this paper a review of selected literature experimental data for saturated-liquid heat capacities
was presented. Two-, three- and four-parameter polynomial correlation models are tested on those data.
Obtained results lead to the conclusion that correlation quality depends on the number of parameters, and
slightly on the type of models. The best two-, three- and four-parameter models were proposed.
Keywords: heat capacity, saturated-liquid heat capacity, correlation, polynomial model.
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J.Serb.Chem.Soc. 68(6)497–504(2003)
UDC 547.261'223.1+541.135.5–039.6:62–232.2
JSCS – 3065
Original scientific paper
Thermodynamic and kinetic behavior of hydrogen electrode in a solution of 0.5 M KClO4 in dimethyl
sulphoxide
V. VOJINOVI], S. MENTUS1* and V. KOMNENI]
Faculty of Metallurgy and Technology, 81000 Podgorica and 1Faculty of Physical Chemistry, University of
Belgrade, Studentski trg 12, 11000 Belgrade, Serbia and Montenegro
(Received 22 August 2002, revised 3 March 2003)
Abstract: The hydrogen electrode on an interface platinum/dimethyl sulphoxide + 0.5 M KClO4 solution
was examined from both the thermodynamic and kinetic aspect, using HCl as a proton source. The
equilibrium potential was shown to obey a Nernstian dependence on concentration. The voltammograms
recorded using a rotating platinum disc electrode evidenced that the cathodic evolution of hydrogen
proceeds under mixed, activation–diffusion control. The diffusion coefficient of the proton was determined
to amount to 4.5´10-6 cm2 s-1. In the region of activation control, a Tafel slope of about 0.110 V dec-1 was
estimated, which indicates that the Volmer reaction is the rate determining step.
Keywords: dimethyl sulphoxide, equilibrium potential, hydrogen electrode, hydrogen evolution, rotating
disc.
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J.Serb.Chem.Soc. 68(6)505–510(2003)
UDC 666.11–033.4:552.323:666.11.01
JSCS – 3066
Original scientific paper
Preparation of basalt-based glass ceramics
BRANKO MATOVI]1, SNE@ANA BO[KOVI]1 and MIHOVIL LOGAR2
1The Vinca Institute of Nuclear Sciences, P. O. Box 522, 11001 Belgrade and 2Faculty of Mining and
Geology, Department of Mineralogy, Dju{ina 7, Belgrade, Serbia and Montenegro
(Received 4 March 2002)
Abstract: Local and conventional raw materials–massive basalt from the Vrelo locality on Kopaonik
mountain–have been used as starting materials to test their suitability for the production of glass-ceramics.
Crystallization phenomena of glasses of the fused basalt rocks were studied by X-ray phase analysis,
optical microscopy and other techniques. Various heat treatments were used, and their influences, on
controlling the microstructures and properties of the products were studied with the aim of developing high
strength glass-ceramic materials. Diopside CaMg(SiO3)2 and hypersthene ((Mg,Fe)SiO3) were identifies
as the crystalline phases. The final products contained considerable amounts of a glassy phase. The
crystalline size was in range of 8–480 mm with plate or needle shape. Microhardness, crashing strength and
wears resistence of the glass-ceramics ranged from 6.5–7.5, from 2000–6300 kg/cm2 and from 0.1–0.2
g/cm, respectively.
Keywords: glass-ceramics, microstructure, mechanical properties.
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J.Serb.Chem.Soc. 68(6)511–513(2003)
UDC 669.3–492.2/.3+621.357:532.14
JSCS – 3067
Preliminary communication
PRELIMINARY COMMUNICATION
The critical apparent density for the free flow of copper powder
KONSTANTIN I. POPOV1, SNE@ANA B. KRSTI]1 and MIOMIR G. PAVLOVI]2
1Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade and
ICTM–Center for Electrochemistry, Njego{eva 12, 11000 Belgrade, Serbia and Montenegro
(Received 26 December 2002)
Abstract: A method for the determination of the critical apparent density, which permits the free flow of
electrodeposited copper powder is discussed. It was found that powders the apparent density of which were
larger than 2.3 g/cm3 exhibit free flow. This is in good agreement with the literature data.
Keywords: copper powder flowability, critical apparent density for free flow.
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