NMR Spectroscopy of Diamagnetic Porphyrins
โ Scribed by Craig J. Medforth
- Book ID
- 101944000
- Publisher
- John Wiley and Sons
- Year
- 2003
- Weight
- 49 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0931-7597
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๐ SIMILAR VOLUMES
Several referencing techniques for measuring 1 7 0 NMR chemical shifts in diamagnetic and paramagnetic solutions have been examined. 1,4-Dioxane is recommended as an external reference standard for diamagnetic solutions because the "0 resonance position is independent of temperature between 27 and 9
## Abstract The nature of the metalloporphyrinโligand complexes produced by zinc, magnesium and cobalt porphyrins with basic ligands has been investigated using the diamagnetic ring current shifts of the porphyrin on the ligand protons. The metal to nitrogen bond lengths in some metalloโ__meso__โte
The structure of a lanthanide porphyrin complex was reinvestigated using a new treatment for the paramagnetic NMR shifts. It was found to differ from that obtained previously in that the ion was closer to the macrocyclic ligand. The new treatment is based on ab inifio estimation of the coefficients