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 SM ISO690:2012GERU, Ion, GAIU, Nicolae, ZHOVMIR, F., LOZAN, Vasile. Synthesis and epr study of mono- and binuclear copper and oxovanadium complexes with compartmental isothiosemicarbazone. In: Achievements and perspectives of modern chemistry, 9-11 octombrie 2019, Chişinău. Chisinau, Republic of Moldova: Tipografia Academiei de Ştiinţe a Moldovei, 2019, p. 102. ISBN 978-9975-62-428-2. |
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| Achievements and perspectives of modern chemistry 2019 | ||||||
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Conferința "International Conference "Achievements and perspectives of modern chemistry"" Chişinău, Moldova, 9-11 octombrie 2019 | ||||||
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On template condensation of 3-formylsalicylic acid S-methylisothiosemicarbazone with 3formylsalicylic acid and Cu(CH3COO)2·H2O (molar ratio 1:1:1) in DMF was obtained mononuclear compound [Cu(L-(COOH)2)]·0.5DMF (1), where L-(COOH)2 represents compartmental ligand N1N4-bis(3-carboxysalicylidenato)-S-methylisothiosemicarbazide (va COOH=1723 cm-1,v.s.). On interaction of 1 with an excess of Cu(CH3COO)2·H2O in DMF in open reaction vessel the dicopper compound [Cu2(L-(COO)2)] 3H2O (2)was synthesized. Reaction of 1 via intermediate Li salt with equimolar VO(SO4)·5H2O in DMSO was isolated heteronuclear complex [CuVO(L-(COO)2)]·DMSO (3).The EPR spectra at room temperature of all three complexes 1 (Figure 1), 2 and 3 (Figure 2) consist of a single resonance line without hyperfine structure with parameters: g=2.054, deltaHpp = 131.5 Oe (1); g=2.046, delta Hpp=288.6 Oe (2); g=2.061, delta Hpp=53.2 Oe (3). In Figure 3 and 4 the dependence of Gauss function fG(H-H0) (black circles) and Lorentz function fL(H-H0) (open circles) versus (H-H0)2 in linearized coordinates are presented. Based on the method of linear anamorphoses [1] it was shown that at room temperature the narrowing of EPR lines of 2 and 3arises due to exchange interaction between paramagnetic ions presented in 2 and, correspondingly, 3. Using the data from Figure 3 and Figure 4, the exchange fields He=240 ±30 Oe (2) and He=220 ±30 Oe (3) were determined. |
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<?xml version='1.0' encoding='utf-8'?> <resource xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns='http://datacite.org/schema/kernel-3' xsi:schemaLocation='http://datacite.org/schema/kernel-3 http://schema.datacite.org/meta/kernel-3/metadata.xsd'> <creators> <creator> <creatorName>Geru, I.I.</creatorName> <affiliation>Institutul de Chimie, Moldova, Republica</affiliation> </creator> <creator> <creatorName>Gaiu, N.</creatorName> <affiliation>Institutul de Chimie, Moldova, Republica</affiliation> </creator> <creator> <creatorName>Jovmir, T.C.</creatorName> <affiliation>Institutul de Chimie, Moldova, Republica</affiliation> </creator> <creator> <creatorName>Lozan, V.I.</creatorName> <affiliation>Institutul de Chimie, Moldova, Republica</affiliation> </creator> </creators> <titles> <title xml:lang='en'>Synthesis and epr study of mono- and binuclear copper and oxovanadium complexes with compartmental isothiosemicarbazone</title> </titles> <publisher>Instrumentul Bibliometric National</publisher> <publicationYear>2019</publicationYear> <relatedIdentifier relatedIdentifierType='ISBN' relationType='IsPartOf'>978-9975-62-428-2</relatedIdentifier> <dates> <date dateType='Issued'>2019</date> </dates> <resourceType resourceTypeGeneral='Text'>Conference Paper</resourceType> <descriptions> <description xml:lang='en' descriptionType='Abstract'><p>On template condensation of 3-formylsalicylic acid S-methylisothiosemicarbazone with 3formylsalicylic acid and Cu(CH3COO)2·H2O (molar ratio 1:1:1) in DMF was obtained mononuclear compound [Cu(L-(COOH)2)]·0.5DMF (1), where L-(COOH)2 represents compartmental ligand N1N4-bis(3-carboxysalicylidenato)-S-methylisothiosemicarbazide (va COOH=1723 cm-1,v.s.). On interaction of 1 with an excess of Cu(CH3COO)2·H2O in DMF in open reaction vessel the dicopper compound [Cu2(L-(COO)2)] 3H2O (2)was synthesized. Reaction of 1 via intermediate Li salt with equimolar VO(SO4)·5H2O in DMSO was isolated heteronuclear complex [CuVO(L-(COO)2)]·DMSO (3).</p><p>The EPR spectra at room temperature of all three complexes 1 (Figure 1), 2 and 3 (Figure 2) consist of a single resonance line without hyperfine structure with parameters: g=2.054, deltaHpp = 131.5 Oe (1); g=2.046, delta Hpp=288.6 Oe (2); g=2.061, delta Hpp=53.2 Oe (3). In Figure 3 and 4 the dependence of Gauss function fG(H-H0) (black circles) and Lorentz function fL(H-H0) (open circles) versus (H-H0)2 in linearized coordinates are presented. Based on the method of linear anamorphoses [1] it was shown that at room temperature the narrowing of EPR lines of 2 and 3arises due to exchange interaction between paramagnetic ions presented in 2 and, correspondingly, 3. Using the data from Figure 3 and Figure 4, the exchange fields He=240 ±30 Oe (2) and He=220 ±30 Oe (3) were determined.</p></description> </descriptions> <formats> <format>application/pdf</format> </formats> </resource>
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