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Präparative Darstellung von μ‐Disauerstoff‐bis‐kobalt(II)‐Chelaten
Author(s) -
Zehnder M.,
Fallab S.
Publication year - 1972
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19720550528
Subject(s) - chemistry , triethylenetetramine , ethylenediamine , cobalt , chelation , denticity , amine gas treating , medicinal chemistry , ammonia , ligand (biochemistry) , bridging ligand , polymer chemistry , inorganic chemistry , ion , crystallography , crystal structure , organic chemistry , biochemistry , receptor
Binuclear cobalt chelates with O 2 as bridging ligand have been prepared, using ethylenediamine, triethylenetetramine, tetraethylenepentamine and tris‐(2‐aminoethyl)‐amine as chelating agents and SCN − and ClO 4 − as anions. They form well characterized crystals which give off molecular oxygen spontaneously in acid solution and, except in the case of the cobalt tetra‐ethylenepentamine chelate, reveal the general composition [(Z)Co · μ(O 2 , OH) · Co(Z)]X 3 , where Z represents the polydentate complexing agents and X the anion. In the presence of ammonia different complexes are produced, in which NH 3 occupies one coordination site of each cobalt, replacing the hydroxo bridge.
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