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Determination of all pK(a) values of some di- and tri-carboxylic unsaturated and epoxy acids and their polylinear correlation with the carboxylic group atomic charges
(Scientific Reviews Ltd., 2003)
For a series of seven unsaturated and seven epoxy di- and tricarboxylic acids, pK(a)(a) values were determined potentiometrically in aqueous media at 25 degreesC and an ionic strength of 0.1 M (NaCl). The thermodynamic ...
Acid-catalyzed and photolytic reactivity of some unsaturated B-nor-5, 10-secosteroidal ketones / Kiselo-katalizovana i fotolitička reaktivnost nekih nezasićenih B-nor-5,10-sekosteroidnih ketona
(Serbian Chemical Society, 2003)
The acid-catalyzed reaction of (Z)- and (E)-B-nor-5,10-seco-ketones 2 and 3 resulted in an intramolecular cyclization to give the 5-hydroxy-A-nor-1β,5β-10(19)-methylidene derivative 8, the 5β-hydroxy-A-nor-1(10)-unsaturated ...
Pretraživanje literature II
(Srpsko hemijsko društvo, Beograd, 2003)
Pretraživanje literature V
(Srpsko hemijsko društvo, Beograd, 2003)
Conformation analysis of three germacranolides by the PM3 semi-empirical method / Konformaciona analiza tri germakranolida PM3 semi-empirijskom metodom
(Serbian Chemical Society, 2003)
The conformations of the C-6 lactonized germacranolides 1–3 were calculated by applying the PM3 semi-empirical method. The low-temperature 1H-NMR spectra of parthenolide (1) were also measured. The relations between the ...
Dithiophenes and other constituents of roots of Centaurea nicolai
(Oxford : Pergamon-Elsevier Science Ltd, 2003)
Centaurea nicolai Bald. is an endemic species found in the Mediterranean part of Montenegro, and in Albania. Roots of C. nicolai were collected on the south slopes of mountain Rumija on the Adriatic coast of Montenegro.
Oxidative fragmentation of 5-hydroxy-1-oxo-5α-cholestan-3β-yl acetate / Oksidativne fragmentacije 5-hidroksi-1-okso-5α-holestan-3β-il-acetata
(Serbian Chemical Society, 2003)
5-hydroxy-1-oxo-5α-cholestan-3β-yl acetate (11) was prepared in 5 steps starting from (E)-3β-acetoxy-5,10-seco-1(10)-cholesten-5-one (6). Treatment of the 1-oxo-5-hydroxy derivative 11 with lead tetraacetate (LTA) (under ...
Lignans from the plant species Achillea lingulata / Лигнани биљне врсте Achillea lingulata
(Serbian Chemical Society, 2003)
Five lignans with a 2.6-diaryl-3.7-dioxabicyclo[3.3.0]octane skeleton, epieudesmin, kobusin, pinoresinol, fargesin and sesartemin, were isolated from the aerial parts and roots of Achillea lingulata. Their structures were ...
Correlation of osmotic coefficient data for ZnSO4(aq) at 25 degrees C by various thermodynamic models
(Springer, 2003)
The available literature data on the osmotic coefficient of ZnSO4(aq) at 25degreesC in the molality range from 0.1 to 4.3 mol-kg(-1) and new experimental data from 1.2 to 2.9 mol-kg(-1), at the same temperature, are ...