## Abstract The proton NMR spectra of tetraphenylporphyrin, octaethylporphyrin and the analogous chlorins (7,8‐dihydroporphyrins) are presented, and the chemical shift changes on chlorin formation are interpreted using a ring current model. In these compounds a general 10% reduction in the ring cur
NMR spectra of porphyrins. 18. A ring-current model for chlorophyll derivatives
✍ Scribed by Abraham, Raymond J.; Smith, Kevin M.; Goff, Dane A.; Lai, Jan Ji
- Book ID
- 123609208
- Publisher
- American Chemical Society
- Year
- 1982
- Tongue
- English
- Weight
- 809 KB
- Volume
- 104
- Category
- Article
- ISSN
- 0002-7863
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📜 SIMILAR VOLUMES
## Abstract The equivalent dipole model of the ring current shift in benzene is shown to be equivalent to that of the well‐known two current loop calculation. A network model of the ring current effect in the porphyrin system is described, using the double–dipole approximation, to give a calculatio
## Abstract The facile preparation of zinc(II) __meso__‐tetraphenylporphyrin (Zn TPP) and derivatives from substituted benzaldehydes and pyrrole, combined with the calculation of ring current shifts in these molecules, provides a useful series of selective diamagnetic shift reagents. The porphyrin‐