Synthesis and Structural Characteristics of Bis(Citrate)Germanates(IV) (Hbipy)2[Ge(HCit)2]·2H2 and [CuCl(bipy)2]2[Ge(HCit)2]·8H2O

Сейфулліна, І. Й.; Марцинко, Е. Э.; Chebanenko, E. А.; Пирожок, О. В.; Dyakonenko, Viktoriya V.; Shishkina, Svitlana V.

doi:10.19261/cjm.2016.11(2).11

Cited by 8 publications

(3 citation statements)

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“…A search of the Cambridge Structural Database (CSD, Version 5.42, update November 2020; Groom et al, 2016) for the Ge(HCit) 2 2À anion yielded 15 structures containing this anion (Seiler et al, 2005;Seifullina et al, 2006Seifullina et al, , 2007Seifullina et al, , 2015Seifullina et al, , 2016Seifullina et al, , 2017aMartsinko et al, 2011Martsinko et al, , 2013Martsinko et al, , 2018a. In these structures, the Ge-O bond lengths for the hydroxyl, -carboxylate and -carboxylate oxygen atoms are in the ranges 1.793-1.840, 1.881-1.914 and 1.904-1.955 Å , respectively.…”

Section: Database Surveymentioning

confidence: 99%

Crystal structure of bis[cis-diaquabis(phenanthroline)cobalt(II)] bis(citrato)germanate(IV) dinitrate

Buchko¹,

Dyakonenko²,

Марцинко³

et al. 2021

Acta Cryst E

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The asymmetric unit of the title compound, [Co(C12H8N2)2(H2O)2]2[Ge(C6H5O7)2](NO3)2, features two complex [(C12H8N2)2(H2O)2Co]2+ cations, two NO3 − anions as well as one centrosymmetric [(C6H5O7)2Ge]2− anion. Two HCit ligands (Cit = citrate, C6H4O7) each coordinate via three different oxygen atoms (hydroxylate, α-carboxylate, β-carboxylate) to the Ge atom, forming a slightly distorted octahedron. The coordination polyhedron of the Co atom is also octahedral, formed by coordination of four nitrogen atoms from two phenanthroline molecules and two water oxygen atoms. In the crystal, the cations and anions are linked by hydrogen bonds and form layers parallel to the bc plane. The structure exhibits disorder of the NO3 − anion [disorder ratio 0.688 (9) to 0.312 (9)]. There are also highly disordered solvent molecules (presumably water and/or ethanol) in the crystal structure; explicit refinement of these molecules was not possible, and the content of the voids was instead taken into account using reverse Fourier transform methods [SQUEEZE procedure in PLATON; Spek (2015). Acta Cryst. C71, 9–18]. The given chemical formula and other crystal data do not take into account the unknown solvent molecule(s).

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Section: Database Surveymentioning

confidence: 99%

Crystal structure of bis[cis-diaquabis(phenanthroline)cobalt(II)] bis(citrato)germanate(IV) dinitrate

Buchko¹,

Dyakonenko²,

Марцинко³

et al. 2021

Acta Cryst E

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“…Òåðìîë³ç êîìïëåêñó ðîçïî÷èíàºòüñÿ ç åí-äîòåðì³÷íîãî åôåêòó â ³íòåðâàë³ òåìïåðàòóð 80-150 0 Ñ (100 0 Ñ), ÿêèé ñóïðîâîäaeóþòüñÿ åë³ì³íà-ö³ºþ â ãàçîâó ôàçó 12 ìîëåêóë êðèñòàë³çàö³éíî¿ âîäè (m ïðàêò =15,83%, m òåîð =15,24%). Çðàçîê º òåðìîñòàá³ëüíèì äî 270 0 Ñ, à ïîò³ì â ³íòåðâàë³ 270-300 0 Ñ (280 0 Ñ) ñïîñòåð³ãàºòüñÿ åêçîåôåêò ç óáóòêîì ìàñè, ÿêèé â³äïîâ³äàº âèäàëåííþ ÷î- Áóäîâà êîîðäèíàö³éíîãî âóçëà ãåðìàí³þ â ñòðóêòóð³ I ïîä³áíà äî áóäîâè, îïèñàíî¿ íàìè ðàí³øå äëÿ á³ñ(öèòðàòî)ãåðìàíàòíèõ êîìïëåêñ³â [1,[5][6][7][8]12]. Îäíàê, íà â³äì³íó â³ä íèõ, â I âñ³ òðè êàðáîêñèëüí³ ãðóïè ³ ã³äðîêñèãðóïà ëèìîííî¿ êèñëîòè äåïðîòîíîâàí³.…”

Section: ðåíòãåíîñòðóêòóðíèé àíàë³çunclassified

Synthesis and structure of heterometallic copper(II)–germanium(IV) complex with citric acid and 2,2'-bipyridine

2019

VKhKhT

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ÑÈÍÒÅÇ ² ÑÒÐÓÊÒÓÐÀ ÃÅÒÅÐÎÌÅÒÀË²×ÍÎÃÎ ÊÎÌÏËÅÊÑÓ ÊÓÏÐÓÌÓ(II)-ÃÅÐÌÀÍ²Þ(IV) Ç ËÈÌÎÍÍÎÞ ÊÈÑËÎÒÎÞ ÒÀ 2,2'-Á²Ï²ÐÈÄÈÍÎÌ a Îäåñüêèé íàö³îíàëüíèé óí³âåðñèòåò ³ìåí³ ².². Ìå÷íèêîâà, ì. Îäåñà, Óêðà¿íà á ÍÒÊ «²íñòèòóò ìîíîêðèñòàë³â» Íàö³îíàëüíî¿ àêàäåì³¿ íàóê Óêðà¿íè, ì. Õàðê³â, Óêðà¿íà â Õàðê³âñüêèé íàö³îíàëüíèé óí³âåðñèòåò ³ìåí³ Â.Í. Êàðàç³íà, ì. Õàðê³â, Óêðà¿íà

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“…But in recent years, special attention of researchers has been directed to the search for substances that can directly aff ect the activity of enzymes, in particular, coordination compounds of transition metals. Coordination compounds of germanium, cobalt, and nickel with organic ligands have already proven themselves as promising enzyme activators [14][15][16]. Th e low toxicity and wide spectrum of biological activity encourage researchers to synthesize new complex compounds [13].…”

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confidence: 99%

Germanium (IV) Complexes with Gluconic Acid as Effectors of Penicillium tardum and Eupenicillium erubescens α-L-Rhamnosidases

Gudzenko,

Borzova,

Varbanets

et al. 2023

Mikrobiol. Z.

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α-L-Rhamnosidase (α-L-rhamnoside-rhamnohydrolase EC 3.2.1.40) showing specificity for terminal α-1,2-, α-1,4- and α-1,6-linked rhamnose residues, which often present in glycoconjugates and synthetic glycosides, can be successfully used in biotechnology for the hydrolysis of rhamnopyranoside residues present in some bioflavonoids, glycoproteins, glycolipids, and other glycoconjugates. Previously, we have shown that a significant part of the coordination compounds of various metals act as effectors of the activity of α-L-rhamnosidases. The aim of this investigation was to study the effect of a number of newly synthesized coordination compounds of Ge(IV) and Ba(II), (Co(II), Ni(II), Cu(II), Zn(II) with gluconic acid on the activity of Penicillium tardum and Eupenicillium erubescens α-L-rhamnosidases. Methods. The objects of the study were Penicillium tardum and Eupenicillium erubescens α-L-rhamnosidases. α-L-Rhamnosidase activity was determined by the Davis method using naringin as a substrate. Coordination compounds Ge(IV) and Ba(II), Co(II), Ni(II), Cu(II) ,and Zn(II) with gluconic acid were used as enzyme activity modifiers. The synthesized complexes correspond to the formulas [М(H2O)6][Ge2(OH)2(C6H8O7)2]·nH2O (М = Ba(1), n=2; Co(2), n=4; Ni(3), n=4; Cu(4), n=4; Zn(5), n=3). Results. The effect of coordination compounds 1-(5) on the activity of α-L-rhamnosidase in two strains of Penicillium tardum and Eupenicillium erubescens was studied depending on the exposure time and concentration of the effector. It was shown that compound (3) at a concentration of 0.01% (1 h incubation) led to a slight (by 5%) increase in the activity of P. tardum α-L-rhamnosidase. Compound 1 at a concentration of 0.1% led to a decrease in the activity of P. tardum α-L-rhamnosidase by 29% during the first hour, and after 24 h of incubation, a decrease in the inhibitory effect to 15% was noted. Compounds 2 and (4) activated the enzyme by 9-39% at 1h exposure. At a concentration of 0.1% and exposure time of 1 h, compound 1 increased the activity of E. erubescens α-L-rhamnosidase by 80%, while at a decrease in concentration to 0.01%, the activity increased only by 29%. In general, it should be noted that in most cases, an increase in the duration of incubation up to 24 h led to a decrease in the level of activation (or inhibition) and a return to the control values of enzyme activity. Conclusions. The variety of effects of metal coordination compounds on the activity of enzymes, depending on the nature of the cation and the origin of the enzyme, has been established. The involvement of Ba(II) had the greatest activating effect on the activity of E. erubescens α-L-rhamnosidase compared to other metals.

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Synthesis and Structural Characteristics of Bis(Citrate)Germanates(IV) (Hbipy)2[Ge(HCit)2]·2H2 and [CuCl(bipy)2]2[Ge(HCit)2]·8H2O

Cited by 8 publications

References 18 publications

Crystal structure of bis[cis-diaquabis(phenanthroline)cobalt(II)] bis(citrato)germanate(IV) dinitrate

Crystal structure of bis[cis-diaquabis(phenanthroline)cobalt(II)] bis(citrato)germanate(IV) dinitrate

Synthesis and structure of heterometallic copper(II)–germanium(IV) complex with citric acid and 2,2'-bipyridine

Germanium (IV) Complexes with Gluconic Acid as Effectors of Penicillium tardum and Eupenicillium erubescens α-L-Rhamnosidases

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