Solvent dependent formation of Cu(II) complexes based on isonicotinamide ligand

Publication date: Available online 8 May 2019Source: Inorganica Chimica ActaAuthor(s): Francisco Sánchez-Férez, Laura Bayés, Mercè Font-Bardia, Josefina PonsAbstractFive solvent-dependent Cu(II) compounds have been synthesized with [Cu(μ-OAc)(μ-Pip)(MeOH)]2 (OAc = acetate; Pip = 1,3-benzodioxolecarboxylate) and isonicotinamide (Isn) as an auxiliary ligand in different solvents. In all the compounds, Pip units are displaced resulting in dimeric [Cu(μ-OAc)(OAc)(Isn)2(solvent)]2 (solvent = MeOH (2a), dmf and H2O (3) or H2O and HPip (4a)), paddle-wheel [Cu(μ-OAc)2(Isn)]2·2dmso (5) or monomeric compounds [Cu(OAc)2(HOAc)(Isn)2]·HOAc (6). All of them have been characterized by analytical and ATR-FTIR techniques and their X-ray crystal structures solved. The OAc anions construct different arrays and exhibit different coordination modes depending on the solvent used. The supramolecular expansion is constantly determined by the amide-amide pattern and the role of the occluded solvent molecules. This tendency is confirmed by Hirshfeld Surface analysis. Finally, the thermal stability of compound 4a has been analyzed.Graphical abstractThe reaction between [Cu(μ-OAc)(μ-Pip)(MeOH)]2 and isonicotinamide as an auxiliary ligand in different solvents resulted in the formation of five Cu(II) compounds. The X-ray single crystal diffraction method show three different structural arrays: dimeric, paddle-wheel and monomeric. The extended structures are studied and Hirshfeld surface analy...
Source: Inorganica Chimica Acta - Category: Chemistry Source Type: research
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