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A New Mixed‐Valent Copper Cyanido Complex and a New Copper(II) Acetato Complex, Prepared with an Ionic Liquid
Author(s) -
Hinz Alexander,
Köckerling Martin
Publication year - 2015
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.201500094
Subject(s) - copper , chemistry , ionic liquid , coordination polymer , cyanide , double salt , inorganic chemistry , salt (chemistry) , molecule , solvent , polymer , polymer chemistry , organic chemistry , catalysis
When copper(II) acetate is treated with the ionic liquid n ‐butylmethylimidazolium cyanide (BMIm‐CN), in ethanol solution, two new copper coordination compounds are obtained. (BMIm) 2 [Cu 4 (CN) 7 ] comprises a 3D coordination polymer of cyanide bridged copper ions. This anionic coordination polymer contains Cu I as well as Cu II ions, i.e. it is a mixed‐valent compound. The polymer can be described as honeycomb structure with the BMIm + cation being located in the cages. The second compound obtained from the chemical reaction is (BMIm)[Cu 2 (OAc) 5 ][Cu(OAc) 2 (H 2 O)] 2 · C 2 H 5 OH, which can be described as double‐salt. The first unit (BMIm)[Cu 2 (OAc) 5 ] contains paddle wheel copper(II) acetato moieties, which are bridged by additional acetato ligands and form infinite chains. The second part of the double salt is the neutral, [Cu(OAc) 2 (H 2 O)] 2 complex. These two parts as well as the co‐crystallized ethanol molecule are connected through a network of hydrogen bridges.