| Articolul precedent |
| Articolul urmator |
 |
 655 2 |
| Ultima descărcare din IBN: 2023-10-18 15:00 |
 SM ISO690:2012ILIES, D., SHOVA, Sergiu, PAKHONTSU, E., GULYA, Aurelian, ROSHU, T.. New copper(II) complexes with 1,5-bis(thiophenylidene) thiocarbohydrazone. Synthesis, characterization and crystal structure. In: The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova, 28-30 mai 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Chimie al AȘM, 2014, p. 82. |
| EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
| The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova 2014 | ||||||
|
Conferința "The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova" Chișinău, Moldova, 28-30 mai 2014 | ||||||
|
||||||
| Pag. 82-82 | ||||||
|
||||||
 Descarcă PDF |
||||||
| Rezumat | ||||||
The thiocarbohydrazone Schiff base ligand 1,5-bis(thiophenylidene)thiocarbohydrazone (HL1) with nitrogen and sulphur as donor atoms was synthesized through condensation of thiophene-2-aldehyde and thiocarbohydrazide in the presence of a few drops of HCl. Six copper(II) complexes were synthesized using HL1 and different copper salts. The ligand was characterized by elemental analysis, UV-Vis, FT-IR, 1H and 13C-NMR spectral studies. The structures of the complexes have been proposed by elemental analyses, molar conductance, spectral (IR, UV-Vis and EPR), magnetic and thermal studies. In addition, the structures of the ligand and complex 4 have been determined by single-crystal X-ray diffraction. The ligand HL1 crystallized into monoclinic lattices with space group P-1 21/c-1 and the complex 4 crystallized into monoclinic lattices with space group P-121/c-1. The ligand HL1 coordinates to the copper ion through the sulfur atom and the azomethine nitrogen atom. The physico-chemical analysis confirmed the newly structures of the ligand HL1 and the copper(II) complexes. In the complexes 2,3,5 and 6, the HL1 act as a mononegative bidentate ligand coordinating to the metal ion through the azomethine nitrogen atom and thiolato sulphur atom. In complexes 1 and 4 the ligand coordinates in a neutral bidentate manner. The values of μeff (1.63 – 2.20 MB) for complexes 1 – 6 suggest the presence of an unpaired electron and indicates the existence of monomeric species of copper(II). The EPR spectra of the complexes 2, 3, 5 and 6 recorded in DMSO solution at 77 K show signals specific to a octahedral distorted geometry for the copper center with values of g┴ between 2,076 and 2,078 g. Further, will develop a method for the synthesis of the ligand HL2 and establish his coordination ability in reaction with metal ions like Cu(II), Ni(II),Co(II) and Pd(II). |
||||||
|
DataCite XML Export
<?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>Ilies, D.</creatorName> <affiliation>Universitatea din Bucureşti, România</affiliation> </creator> <creator> <creatorName>Şova, S.G.</creatorName> <affiliation>Institutul de Chimie Macromoleculara „Petru Poni“, Iaşi, România</affiliation> </creator> <creator> <creatorName>Pahontu, E.</creatorName> <affiliation>Universitatea de Medicină şi Farmacie „Carol Davila“, România</affiliation> </creator> <creator> <creatorName>Gulea, A.P.</creatorName> <affiliation>Universitatea de Stat din Moldova, Moldova, Republica</affiliation> </creator> <creator> <creatorName>Roşu, T.</creatorName> <affiliation>Universitatea din Bucureşti, România</affiliation> </creator> </creators> <titles> <title xml:lang='en'>New copper(II) complexes with 1,5-bis(thiophenylidene) thiocarbohydrazone. Synthesis, characterization and crystal structure</title> </titles> <publisher>Instrumentul Bibliometric National</publisher> <publicationYear>2014</publicationYear> <relatedIdentifier relatedIdentifierType='ISBN' relationType='IsPartOf'></relatedIdentifier> <dates> <date dateType='Issued'>2014</date> </dates> <resourceType resourceTypeGeneral='Text'>Conference Paper</resourceType> <descriptions> <description xml:lang='en' descriptionType='Abstract'><p>The thiocarbohydrazone Schiff base ligand 1,5-bis(thiophenylidene)thiocarbohydrazone (HL1) with nitrogen and sulphur as donor atoms was synthesized through condensation of thiophene-2-aldehyde and thiocarbohydrazide in the presence of a few drops of HCl. Six copper(II) complexes were synthesized using HL1 and different copper salts. The ligand was characterized by elemental analysis, UV-Vis, FT-IR, 1H and 13C-NMR spectral studies. The structures of the complexes have been proposed by elemental analyses, molar conductance, spectral (IR, UV-Vis and EPR), magnetic and thermal studies. In addition, the structures of the ligand and complex <strong>4 </strong>have been determined by single-crystal X-ray diffraction. The ligand <strong>HL</strong><strong>1 </strong>crystallized into monoclinic lattices with space group P-1 21/c-1 and the complex <strong>4 </strong>crystallized into monoclinic lattices with space group P-121/c-1. The ligand <strong>HL</strong><strong>1 </strong>coordinates to the copper ion through the sulfur atom and the azomethine nitrogen atom. The physico-chemical analysis confirmed the newly structures of the ligand HL1 and the copper(II) complexes. In the complexes <strong>2</strong>,<strong>3</strong>,<strong>5 </strong>and <strong>6</strong>, the HL1 act as a mononegative bidentate ligand coordinating to the metal ion through the azomethine nitrogen atom and thiolato sulphur atom. In complexes <strong>1 </strong>and <strong>4 </strong>the ligand coordinates in a neutral bidentate manner. The values of μeff (1.63 – 2.20 MB) for complexes <strong>1 </strong>– <strong>6 </strong>suggest the presence of an unpaired electron and indicates the existence of monomeric species of copper(II). The EPR spectra of the complexes <strong>2</strong>, <strong>3</strong>, <strong>5 </strong>and <strong>6 </strong>recorded in DMSO solution at 77 K show signals specific to a octahedral distorted geometry for the copper center with values of g┴ between 2,076 and 2,078 g. Further, will develop a method for the synthesis of the ligand HL2 and establish his coordination ability in reaction with metal ions like Cu(II), Ni(II),Co(II) and Pd(II).</p></description> </descriptions> <formats> <format>application/pdf</format> </formats> </resource>
|
|
|
