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- W2034348459 abstract "Five model compounds of cytochrome P-450, [Fe(III)(porphyrin)(thiolate)] (high spin) and two model compounds of cytochrome c, [Fe(III)(TPP)(thioether)2]ClO4 (low spin) have been prepared, and their far-infrared spectra measured to assign the axial FeS stretching vibrations. Based on 54Fe56Fe isotope shift data, the Fe- S− (thiolate) and FeS0 (thioether) stretching vibrations have been assigned at 345−335 and 333−323 cm−1, respectively. The [Fe(TPP)(SC6H5)2]− ion (low spin) exhibits the anti-symmetric S−FeS− stretching band at 345 cm−1 which is about 20 ∼ 16 cm−1 higher than the S0Fe%z.sbnd;S0 stretching vibration of the [Fe(TPP)-(thioether)2]+ ion. This result is interpreted as indicating that the FeS− bond is stronger than the S0z.sbnd;FeS0 bond if other conditions are equal. Possible origins of frequency discrepancy between cytochrome P-450cam (351 cm−1 and its model compounds have been discussed, and the failure to observe the FeS vibrations in Raman spectra has been attributed to the small oscillator strength of the FeS CT transition in the UV region." @default.
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- W2034348459 date "1985-01-01" @default.
- W2034348459 modified "2023-10-18" @default.
- W2034348459 title "Ironsulfur vibrations in model compounds of cytochromes P-450 and c" @default.
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- W2034348459 doi "https://doi.org/10.1016/s0020-1693(00)93738-1" @default.
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