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 SM ISO690:2012MICHITIUC, Olga, KRAVTSOV, Victor, BACA, Svetlana. Dinuclear Cu(II) isobutyrates with 4-pyridinecarboxaldehyde and dimethyl sulfoxide. In: Materials Science and Condensed Matter Physics, Ed. 9, 25-28 septembrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2018, Ediția 9, p. 140. |
| EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
| Materials Science and Condensed Matter Physics Ediția 9, 2018 |
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Conferința "International Conference on Materials Science and Condensed Matter Physics" 9, Chișinău, Moldova, 25-28 septembrie 2018 | |||||||
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| CZU: 544+535.37+546.56 | |||||||
| Pag. 140-140 | |||||||
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A new dinuclear copper(II) coordination compound based on isobutyric acid and 4-pyridinecarboxaldehyde (pyca) of the formula [Cu2(is)4(pyca)2] (1) has been synthesized and characterized by a range of physical methods including IR spectroscopy and thermogravimetric analysis. A single-crystal X-ray diffraction analysis shows that 1 crystalizes in the tetragonal space group I4122 with a = b =15.5155(7), c = 13.7051(9) Å, V = 3299.2(3) Å3. In the structure 1 dinuclear complex reside on special position and has D2 molecular symmetry. The complex reveals two square pyramidal Cu(II) centers with each Cu(II) atom bound to four O atoms from four isobutyrates and one N atom of pyca ligand forming a NO4 donor set (Figure 1). The Cu-O bond distances are in the range of 1.951(6) and 1.960(6) Å, Cu-N bond distance equals to 2.181(7) Å and Cu…Cu distance is 2.615(2) Å. Changing the solvent from acetone to dimethyl sulfoxide in the similar reaction led to the precipitation of a dinuclear [Cu2(is)4(dmso)2] (2) complex, where an apical position to each copper atom occupies by dmso molecule instead of pyca in 1 (Figure 1b). Complex 2 crystalizes in the trigonal space group R-3 with a = b = 19.4596(8), c = 22.1622(8) Å, V = 7267.94(8) Å3. In crystal the complex resides on an inversion center thus having Ci symmetry. The square pyramidal Cu(II) atoms are coordinated by four O atoms from four isobutyrates and one O atom of dmso ligand forming an O5 donor set (Cu-Ocarb, 1.94(2) - 1.98(2); Cu-Odmso, 2.133(4) Å). Compare to 1, the Cu…Cu distance of 2.635(8) Å is slightly longer in 2. The peculiarities of the reaction conditions as well as the possibilities to arrange such dinuclear copper(II) clusters into extended networks will be discussed. |
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Cerif XML Export
<?xml version='1.0' encoding='utf-8'?> <CERIF xmlns='urn:xmlns:org:eurocris:cerif-1.5-1' xsi:schemaLocation='urn:xmlns:org:eurocris:cerif-1.5-1 http://www.eurocris.org/Uploads/Web%20pages/CERIF-1.5/CERIF_1.5_1.xsd' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' release='1.5' date='2012-10-07' sourceDatabase='Output Profile'> <cfResPubl> <cfResPublId>ibn-ResPubl-71570</cfResPublId> <cfResPublDate>2018</cfResPublDate> <cfVol>Ediția 9</cfVol> <cfStartPage>140</cfStartPage> <cfISBN></cfISBN> <cfURI>https://ibn.idsi.md/ro/vizualizare_articol/71570</cfURI> <cfTitle cfLangCode='EN' cfTrans='o'>Dinuclear Cu(II) isobutyrates with 4-pyridinecarboxaldehyde and dimethyl sulfoxide</cfTitle> <cfAbstr cfLangCode='EN' cfTrans='o'><p>A new dinuclear copper(II) coordination compound based on isobutyric acid and 4-pyridinecarboxaldehyde (pyca) of the formula [Cu2(is)4(pyca)2] (<strong>1</strong>) has been synthesized and characterized by a range of physical methods including IR spectroscopy and thermogravimetric analysis. A single-crystal X-ray diffraction analysis shows that <strong>1 </strong>crystalizes in the tetragonal space group <em>I</em>4122 with <em>a </em>= <em>b </em>=15.5155(7), <em>c </em>= 13.7051(9) Å, <em>V </em>= 3299.2(3) Å3. In the structure <strong>1 </strong>dinuclear complex reside on special position and has <em>D</em>2 molecular symmetry. The complex reveals two square pyramidal Cu(II) centers with each Cu(II) atom bound to four O atoms from four isobutyrates and one N atom of pyca ligand forming a NO4 donor set (Figure 1). The Cu-O bond distances are in the range of 1.951(6) and 1.960(6) Å, Cu-N bond distance equals to 2.181(7) Å and Cu…Cu distance is 2.615(2) Å. Changing the solvent from acetone to dimethyl sulfoxide in the similar reaction led to the precipitation of a dinuclear [Cu2(is)4(dmso)2] (<strong>2</strong>) complex, where an apical position to each copper atom occupies by dmso molecule instead of pyca in <strong>1 </strong>(Figure 1b). Complex <strong>2 </strong>crystalizes in the trigonal space group <em>R-</em>3 with <em>a </em>= <em>b </em>= 19.4596(8), <em>c </em>= 22.1622(8) Å, <em>V </em>= 7267.94(8) Å3. In crystal the complex resides on an inversion center thus having <em>C</em>i symmetry. The square pyramidal Cu(II) atoms are coordinated by four O atoms from four isobutyrates and one O atom of dmso ligand forming an O5 donor set (Cu-Ocarb, 1.94(2) - 1.98(2); Cu-Odmso, 2.133(4) Å). Compare to <strong>1</strong>, the Cu…Cu distance of 2.635(8) Å is slightly longer in <strong>2</strong>. 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