DIFFERENT-LIGAND COMPLEXES OF GERMANIUM(IV) WITH MANDELIC, GALLIC ACIDS AND HETEROCYCLIC AMINES
Journal Title: Вісник Одеського національного університету. Хімія - Year 2018, Vol 23, Issue 3
Abstract
Optimal synthesis methods of germanium(IV) coordination compounds with mandelic (Н2Mand), gallic (Н4Gal) acids and 1,10-phenantroline (phen), 2,2′-bipyridine (bipy) in water solution were developed. Their composition was established. Thermogravimetric analysis of coordination compounds with mandelic acid 1, 2 showed that complexes are crystallohydrates. Thermal destruction of both compounds is similar: the endothermic effect with the maximum at 100 °С and 90 °С is observed in the temperature range 70-230 °С (for 1) and 80-240 °С (for 2) respectively. This effect is followed by the weight loss about 3,3% for 1 and 6,1% for 2, which corresponds to one and two water molecules. The difference in thermal destruction of 3 and 4 (with gallic acid) is absence of low-temperature endo-thermic effects. Two consequent exothermic effects in the interval 260-520 °С are observed for 3 (for 4 - one exothermic effect at 340-520 °С), during which phen and bipy molecules ware eliminated. During the X-Ray analytics there was established that 3 (CCDC 1862035; e-mail: deposit@ccdc.cam.ac.uk) is different-ligand complex with distorted octahedral polyhedron, which is formed with four oxygen atoms of two molecules of gallic acid and two nitrogen atoms of 1,10-phenantroline. In the crystal 3 molecules are bonded between each other through hydrogen bonds and form three-dimensional net. In crystal c emptiness between molecules with the volume 1084.76 Å3 (which is 33% from the total unit cell volume) is formed along the crystallographic axis. In this article it is shown that mononuclear different-ligand complexes with octahedral coordination polyhedron of germanium [Ge(Mand)2(phen)]∙2H2O (1), [Ge(Mand)2(bipy)]∙H2O (2), [Ge(Н2Gal)2(phen)] (3), [Ge(Н2Gal)2(bipy)] (4) were formed. Their structures were suggested.
Authors and Affiliations
E. E. Martsinko, E. A. Chebanenko, I. I. Seifullina, V. V. Dyakonenko, S. V. Shishkina, J. R. Kim, M. I. Gromova
Keywords
Related Articles
- EP ID EP494025
- DOI 10.18524/2304-0947.2018.3(67).140803
- Views 85
- Downloads 0
SYNTHESIS OF 3,5-DIBROMO- AND 2,4,5-TRIBROMO-1,8-NAPHTHALIMIDES
3,5-Dibromo-1,8-naphthalic acid and 2,4,5-tribromo-1,8-naphthalic acid were synthesized by oxidation of 1,5,7-tribromoacenaphthylene and 3,5,6-tribromoacenaphthylene by sodium dichromate in anhydrous acetic acid. The ob...
ADSORPTION AND PROTECTIVE PROPERTIES OF MODIFIED CLINOPTILOLITE IN RESPECT OF SO2
The dynamics of sulfur dioxide adsorption by samples of clinoptilolite both natural and modified by thermal, hydrothermal, and acid-thermal methods at SO2initial concentrations in gas-air mixture ranging from 50 to 200 m...
INTERRELATION OF ACIDITY-BASICITY, SOLUBILITY AND ABILITY TO INTERACTION OF FLUORIDES OF ALKALINE AND ALKALINE – EARTH METALS
Influence of the various factors on solubility in water of fluorides of alkaline and alkaline – earth metals of composition MF (M – Li ÷ Cs) and M’F2(M – Be ÷ Ba) is considered. The defining role of the factor of basicit...
SPECTROSCOPIC STUDY OF INTERACTION OF INDOMETHACIN AND DACLATASVIR DIGIDROCHLORIDE WITH HUMAN SERUM ALBUMIN
Fluorescence spectroscopy is one of the most effective methods for studying the binding of drugs to proteins, which is important for the purposes of biochemistry and medicine. When studying the interaction in vitro, huma...
SYNTHESIS OF BENZOFURAN DERIVATIVES ON THE BASIS OF N-ACYL-1,4-BENZOQUINONE MONOIMINES
Earlier it was found the structure of the reaction products of 1,4-benzoquinones and N-arylsulfonyl-1,4-benzoquinone monoimines with acetylacetone imines depends on the structure of the reagents and the experimental cond...