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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 1
BKCSDE 23(1)
January 20, 2002 

Solution Nuclear Magnetic Resonance Spectral Characterization of Iron(II) Porphyrin Complexes of Weakly Coordinating Anions
Byungho Song, Bongjin Park, Chulhee Han
Anion binding, Iron porphyrin.
Weakly coordinating anions show little affinity for binding to unfunctionalized iron(Ⅱ) porphyrins. The electron-deficient 5, 10, 15, 20-tetrakis(pentafluorophenyl)porphinatoiron(Ⅱ) compound is utilized in this study to demonstrate solution coordination by chloride, bromide and acetate ions. The binding strength of anions to the iron(Ⅱ) porphyrin is reflected by a systematic change in pyrrole proton chemical shift in 1H NMR spectra; the pyrrole resonance moves downfield when the σ-donor ability of anions is decreased.
119 - 122
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