Abstract
Mössbauer spectra of hexakis (trimethylacetato) ferrate(III) complexes with general formula M3[Fe{OCOC(CH3)3}6] (where M=H+, Li+, Na+, K+ and NH +4 ) exhibit a quadrupole doublet with ΔEQ=0.31–0.65 mms−1 and δ=0.60–0.74 mms−1 (with respect to S.N.P. as standard). Infrared studies suggest unidentate coordination of the carboxylate ligands. Anomalously high δ and ΔEQ values for H3[Fe{OCOC(CH3)3}6] have been explained in terms of possible hydrogen bonding. Thermal decomposition studies show fast and single stage decomposition yielding a constant weight at 320°C. Mössbauer spectra of intermediates after heating complexes at different temperatures indicate increasing ΔEQ values. At 350°C, all complexes exhibit six-line spectra, suggesting the formation of alkali metal ferrate (Na2O·NaFeO2) or Fe2O3.
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Lanjewar, R.B., Garg, A.N. Mössbauer spectroscopic studies in alkali metal hexakis (trimethylacetato) ferrate(III) complexes and their thermal decomposition products. Journal of Radioanalytical and Nuclear Chemistry Letters 155, 211–224 (1991). https://doi.org/10.1007/BF02168312
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DOI: https://doi.org/10.1007/BF02168312