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Piperazinium, Ethylenediammonium or 4,4′‐Bipyridinium Halocuprates(I) by Cu II /Cu 0 Comproportionation
Author(s) -
Redel Engelbert,
Fiederle Michael,
Janiak Christoph
Publication year - 2009
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.200900091
Subject(s) - comproportionation , dication , chemistry , crystallography , copper , cationic polymerization , halide , crystal structure , metal , aqueous solution , inorganic chemistry , ion , electrochemistry , polymer chemistry , organic chemistry , electrode
Abstract 1‐Dimensional halocuprate(I) chains [(Cu 2 X 4 ) 2– ] n (= [(CuX 2 ) – ] n , X = Cl, Br, I) have been synthesized under hydrothermal conditions through in‐situ reduction of Cu II X 2 with Fe II X 2 or as phase pure materials through comproportionation of Cu II X 2 or Cu II O with Cu 0 metal in the presence of the respective aqueous hydrogen halide HX and a templating amine. Chains of trans edge‐sharing tetrahedra are obtained with piperazinium or ethylenediammonium dications, while the 4,4′‐bipyridinium dication gave chains of cis edge‐sharing tetrahedra. Two monoprotonated piperazinium groups act as cationic ligands (Hpipz + ) towards copper atoms in a molecular [Cu 4 (μ‐Br 6 )(Hpipz) 2 ] cluster. Electrical crystal conductivities of the halocuprate [(Cu 2 X 4 ) 2– ] n (= [(CuX 2 ) – ] n ) chains (X = Cl, Br, I) are around 10 –8 S · cm –1 at room temperature.