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Hyperfine Shifts of the 13C-NMR. in low spin iron(III) porphyrin complexes

✍ Scribed by Kurt Wüthrich; Rudolf Baumann

Publisher
John Wiley and Sons
Year
1973
Tongue
German
Weight
676 KB
Volume
56
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

The ^13^C‐NMR. in Zn(II)(Porphin), Fe(III)(Porphin)(CN~2~), Zn(II)(Tetraphenyl‐porphin), and Fe(III)(Tetraphenylporphin)(CN~2~) have been identified, and the ^13^C hyperfine shifts in the iron complexes evaluated. It was found that dipole‐dipole coupling with the electron spin localized in the π‐orbitals of the aromatic carbon atoms makes an important contribution, to the ^13^C hyperfine shifts. In a preliminary analysis the experimental spin density distribution obtained from the combined ^1^H‐ and ^13^C‐NMR.‐data is compared with theoretical models of the iron porphyrin complexes.

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