Cyanide: A Strong-Field Ligand for Ferrohemes and Hemoproteins?

A CN weakling? The cyanide ligand in the five‐coordinate iron(II) porphyrinate complex [Fe(tpp)(CN)]− (tpp=tetraphenylporphinato) is not a sufficiently strong‐field ligand to cause the complex to be in the low‐spin state under all conditions. Rather, the complex displays a reversible low‐spin (LS) t...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2008-01, Vol.47 (52), p.10144-10146
Main Authors: Li, Jianfeng, Lord, Richard L, Noll, Bruce C, Baik, Mu-Hyun, Schulz, Charles E, Scheidt, W. Robert
Format: Article
Language:English
Subjects:
cyanides
Cyanides - chemistry
Heme - chemistry
Hemeproteins - chemistry
iron
Ligands
magnetic properties
porphyrinoids
Porphyrins - chemistry
spin crossover
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Summary:A CN weakling? The cyanide ligand in the five‐coordinate iron(II) porphyrinate complex [Fe(tpp)(CN)]− (tpp=tetraphenylporphinato) is not a sufficiently strong‐field ligand to cause the complex to be in the low‐spin state under all conditions. Rather, the complex displays a reversible low‐spin (LS) to high‐spin (HS) crossover with no hysteresis.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200804116