Variable temperature proton NMR spectroscopy , as well as theoretical studies, will be used to compare the reported free energy of activation value of the tetrapheyny porphyrin (12.2 kcal/mol), the 5. 15 di phenyls substituted porphine with an in plane distortion (11.6 kcal/mol) whith the 5. 15 dibromo -10, 20 diphenylporphine and 5 bromo-10, 15, 20 triphenylporphine. The experimental determination of tautomerization using VT H'NMR of both porphyrins is to be compared to the molecular modeling analaysis of the porphyrin structure using MM+

Porphyrin tautomerization of the 5, 15 dibromo 10, 20 diphenyl porphine and 5 bromo 10, 15, 20 triphenyl porphine using VT HNMR

255th National Meeting (2018)

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