Neue wasserlösliche Osmiumkomplexe des 5,10,15,20‐Tetrakis(4‐sulfonatophenyl)‐porphyrin‐Anions |
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Authors: | Johann W Buchler Joachim R Simon |
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Abstract: | Metal Complexes with Tetrapyrrole Ligands. LXXVI. New Water‐soluble Osmium Complexes of 5,10,15,20‐Tetrakis(4‐sulfonatophenyl)porphyrin‐Anion The new symmetrical osmium(II) porphyrinates Os(tpps4)L2]4– ( 1 b – g ) are formed from OsO2(tpps4)]4– ( 1 a ) by reduction in presence of the ligands L. 1 e – g react with 1‐methylimidazole to yield the unsymmetrical complexes Os(tpps4)LL′]4– ( 1 h – j ). Except for 1 g – h the osmium(II) porphyrinates are not inert in presence of air and are oxidized to the osmium(III) porphyrinates Os(tpps4)L2]3– ( 2 b – f ) and Os(tpps4)LL′]3– ( 2 i – j ). These anions are deposited as sodium salts. |
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Keywords: | Osmium Water‐soluble Metalloporphyrins Osmium tetrakis(4‐sulfonatophenyl)porphyrinates Autoxidation |
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