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Metal complexes with tetrapyrrole ligands: Part LXXVII. New osmium complexes of the 5,10,15,20-tetrakis-(4-carboxyphenyl) porphyrin

JOHANN W. BUCHLER

Institute for Inorganic Chemistry, Technical University of Darmstadt, Petersenstraße 18, D-64287 Darmstadt, Germany

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and

JOACHIM R. SIMON

Institute for Inorganic Chemistry, Technical University of Darmstadt, Petersenstraße 18, D-64287 Darmstadt, Germany

Corresponding author, Dr. Theodor Schuchardt & Co., Eduard-Buchner-Straße 14-20, D-85662 Hohenbrunn, Germany.

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https://doi.org/10.1002/jpp.352Cited by:4 (Source: Crossref)

Abstract

The synthesis and characterization of new alkali-soluble osmium tetraphenylporphyrinates, complexes of the 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin Os(tH₄cpp)L₂ and Os(tH₄cpp)LL' (2a–j), is described. 2a–j are obtained from the corresponding new osmium porphyrinates Os(tmecpp)L₂ and Os(tmecpp)LL'(1a–k) by alkaline saponification and precipitation with hydrochloric acid. In fact, the osmium(II) porphyrinates 2c–f as well as 2i–j are oxidized to the osmium(III) porphyrinates Os(tH₃cpp)L₂(3c–f) and Os(tH₃cpp)LL'(3i–j) in the presence of air, as confirmed by UV-vis spectroscopy.

Part LXXVI: Ref. [1].

Keywords:

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