Structural motifs in heteroleptic copper and cadmium selenites
| Autor: | Stefano Canossa, Giovanni Predieri, Claudia Graiff, Massimiliano Delferro, Enrico Bellè |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010405 organic chemistry
Ligand Selenourea Inorganic chemistry chemistry.chemical_element Crystal structure 010402 general chemistry 01 natural sciences Copper 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound Crystallography chemistry Thiourea Diamine Materials Chemistry Moiety Physical and Theoretical Chemistry Selenium |
| Zdroj: | Inorganica Chimica Acta. 470:206-212 |
| ISSN: | 0020-1693 |
| DOI: | 10.1016/j.ica.2017.05.043 |
| Popis: | Cu(II) cations in the presence of diamine ligands such as tetramethylethylendiamine (TMEDA) react with Na2SeO3 to produce the heteroleptic selenite copper compound of formula [Cu3(TMEDA)3(SeO3)2(H2O)4](NO3)2. In the cationic moiety two copper atoms are linked by two selenite anions through the O–Se–O bridge. One of the two bridging selenite anion coordinates to a third copper atom through the third oxygen atom. Reaction of Cd(CH3COO)2·2H2O with Na2SeO3 in the presence of ligand with softer character such as thiourea [(NH2)2CS; tu] or selenourea [(NH2)2CSe; tu] in aqueous solution afforded the complex [{Cd(tu)2SeO3}2], whose structure has been elucidated by X-ray diffraction analysis. It is the first reported example of a molecular cadmium selenite complex. Two cadmium cations stabilized by the coordination of four ancillary thiourea soft ligands, are linked together by two bridging selenite ions through O and O–Se–O bridges. A comparison between the coordination mode of the selenite ion in those cadmium and copper complexes and in inorganic extended CdSeO3 and hydrated CuSeO3 phases is also reported. |
| Databáze: | OpenAIRE |
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