Abstract
The NH–tautomerism of meso–substituted porphyrins has been reported to decrease with porphyrin distortion by enhancing intramolecular hydrogen bonding of the NH protons. Electron withdrawing groups should deshield the internal hydrogen’s shifting the NH chemical shift spectra further up field by affecting the ring current, and the opposite effect is expected for electron donating substituents at the meso position of the porphyrin core. The effect of several substituents in the para positions of the phenyl group of meso–substituted porphyrins would be correlated to the NH–tautomerism in phenyl– substituted porphyrins.
Faculty Sponsors
Dr. Maria Ballester
Project Type
Event
Location
Alvin Sherman Library
Start Date
4-12-2013 1:00 PM
End Date
4-12-2013 5:30 PM
NH-Tautomerism in Para-Substituted Tetraphenylporphyrin Derivatives
Alvin Sherman Library
The NH–tautomerism of meso–substituted porphyrins has been reported to decrease with porphyrin distortion by enhancing intramolecular hydrogen bonding of the NH protons. Electron withdrawing groups should deshield the internal hydrogen’s shifting the NH chemical shift spectra further up field by affecting the ring current, and the opposite effect is expected for electron donating substituents at the meso position of the porphyrin core. The effect of several substituents in the para positions of the phenyl group of meso–substituted porphyrins would be correlated to the NH–tautomerism in phenyl– substituted porphyrins.
