Models for Cytochromes  c′ : Observation of an Extremely Labile Spin State in Monoimidazole Complexes of Saddle‐Shaped Iron(III) Porphyrinates | Zendy

Ikezaki Akira | Zendy; Takahashi Masashi | Zendy; Nakamura Mikio | Zendy

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Models for Cytochromes c′ : Observation of an Extremely Labile Spin State in Monoimidazole Complexes of Saddle‐Shaped Iron(III) Porphyrinates

Author(s) -

Ikezaki Akira,

Takahashi Masashi,

Nakamura Mikio

Publication year - 2009

Publication title -

angewandte chemie international edition

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.831

H-Index - 550

eISSN - 1521-3773

pISSN - 1433-7851

DOI - 10.1002/anie.200902224

Subject(s) - saddle , spin (aerodynamics) , imidazole , state (computer science) , spin states , saddle point , chemistry , crystallography , stereochemistry , physics , thermodynamics , mathematics , inorganic chemistry , algorithm , mathematical optimization , geometry

Saddle in a spin : The saddle‐shaped octaethyltetraphenylporphyrin–imidazole complex [Fe III (oetpp)(HIm)] + adopts an essentially pure intermediate‐spin state between 298 and 173 K in CD 2 Cl 2 solution, the conditions under which the NMR spectra are recorded. This complex has shown, however, a novel spin transition from S =3/2 to S =5/2 and S =1/2 below 70 K. Thus, the complex exists as an equilibrium mixture of three spin isomers at 4 K.

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