2026-05-28T20:37:34Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/210212026-02-03T10:54:16Zcom_10630_2254col_10630_37953

Synthesis and structural characterization of homochiral 2D coordination polymers of zinc and copper with conformationally flexible ditopic imidazolium-based dicarboxylate ligands Nicasio, Antonio I. Montilla, Francisco Álvarez, Eleuterio Pérez-Colodrero, Rosario Mercedes Galindo, Agustín Química inorgánica Different novel coordination polymers containing zinc, 1–4, and copper, 5–8, metals, connected via chiral imidazolium-based dicarboxylate ligands, [LR]−, were isolated by reaction between zinc acetate or copper acetate and enantiomerically pure HLR compounds. They were characterised and structurally identified by X-ray diffraction methods (single crystal and powder). These compounds are twodimensional homochiral coordination polymers, [M(LR)2]n, in which the metal ions are coordinated by the two carboxylate groups of [LR]− anions in a general bridging monodentate μ2–κ1-O1,κ1-O3 fashion that afforded tetrahedral metal coordination environments for zinc, 1–4, and square planar for copper, 5–8, complexes. In all the compounds the 3D supramolecular architecture is constructed by non-covalent interactions between the hydrophobic parts (R groups) of the homochiral 2D coordination polymers and, in some cases, by weak C–H⋯O non-classical hydrogen bonds that provided, in general, a dense crystal packing. DFT calculations on the [LR]− anions confirmed their conformational flexibility as ditopic linkers and this fact makes possible the formation of different coordination polymers for four-coordinated metal centers. Preliminary studies on the Zn-catalyzed synthesis of chiral α-aminophosphonates were carried out and, unfortunately, no enantioselectivity was observed in these reactions. 2021-03-04T10:43:51Z 2021-03-04T10:43:51Z 2021-03-04T10:43:51Z 2016-11-30 journal article Dalton Trans., 2017, 46, 471 https://hdl.handle.net/10630/21021 10.1039/c6dt03712g eng open access The Royal Society of Chemistry