SCHEDULED MAINTENANCE
Variable-temperature n.m.r. spectra of a series of In, Ru, and Ti complexes of substituted tetraphenylporphyrins show that phenyl ring rotation occurs on the n.m.r. time scale if the phenyl ring ortho-substituents are hydrogen.
S. S. Eaton and G. R. Eaton, J. Chem. Soc., Chem. Commun., 1974, 576 DOI: 10.1039/C39740000576
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