Crystal and electronic structures of tris[4,4,4-Trifluoro-1-(2-X)-1,3-butanedionato]iron(III) isomers (X = thienyl or furyl): An X-ray and computational study

Add time:08/17/2019    Source:sciencedirect.com

DFT calculations showed that [Fe(acac)3] (where acac = acetylacetonato) is high-spin, with a negative D3 distortion from the octahedral ligand field. Calculations further showed that, although both the fac and mer isomers of complexes [Fe(CF3COCHCOR)3], where R = C4H3S or C4H3O, can exist, the mer isomers are energetically favoured in both complexes. The structure of the major mer isomer of [Fe(CF3COCHCOC4H3S)3] has been published previously, while the crystal structure of the minor fac isomer of [Fe(CF3COCHCOC4H3S)3] is presented in this study. The structure of the mer isomer of [Fe(CF3COCHCOC4H3O)3], in agreement with DFT calculations, showed that the furyl substituent pointed towards the CF3 group in a syn orientation.

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