The frequency of the Raman-active Co–C bond stretch in photolabile methylcoenzyme B12 has been conclusively determined by the new technique of near-IR Fourier transform (FT) Raman spectroscopy to be 500 cm–1 for methylcobalamin and 470 Cm–1 for deuteriated methyl (CD3–) cobalamin.
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Nie et al. (1990) studied this question.
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