An Aqua-Bridged Helical-Chain Copper(II)-Saccharinato Polymer Linked into a Two-Dimensional Supramolecular Framework

• Published in: Zeitschrift für anorganische und allgemeine Chemie (1950) Vol. 632; no. 3; pp. 505 - 508
• Main Authors: Yilmaz, Veysel T., Kars, Vecdi, Kazak, Canan
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.02.2006; WILEY‐VCH Verlag
• Subjects: 2-Dimethylaminoethanol; Copper; Crystal structure; Saccharin
• ISSN: 0044-2313; 1521-3749
• DOI: 10.1002/zaac.200500457

A new assembly [Cu2(sac)2(μ‐dmea)2(μ‐H2O)]n (sac = saccharinate and Hdmea = 2‐dimethylaminoethanol) has been synthesized and characterized by elemental analysis, IR spectroscopy, thermal analysis and single crystal X‐ray diffraction. The complex crystallizes in the monoclinic space group C2/c and consists of dinuclear modules of [Cu2(sac)2(dmea)2]. The sac ligand is N‐coordinated, while the dmea ligand is in the deprotanated form by losing the ethanol hydrogen atom and acts as a bidentate donor through the alkoxo group and N atom. The alkoxo group also serves as a bridge between two copper(II) ions, leading to an intra‐dimer Cu···Cu separation of 3.0229(7) Å. The dimeric units are bridged by aqua ligands to generate a one‐dimensional water‐bridged helical chain, in which the copper(II) ions exhibit a distorted square‐pyramidal CuN2O3 coordination. The Cu–Cu distance in the chain separated by the bridging aqua ligands is 5.297Å. The polymeric chains are further linked by π(sac)···π(sac) and C–H···π(sac) interactions into a two‐dimensional supramolecular network.