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Issue 12, 1972
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Correlation of FeII low-spin Mössbauer quadrupole splittings and the 1T1 splitting in the electronic spectra of iron(II) isocyanide compounds. The oxidation state of tin in the tin trichloride ligand

G. M. Bancroft  and  K. D. Butler 

Abstract

The electronic spectra of five iron(II)-isocyanide complexes of general formula trans-and cis-FeX2(ArNC)4(X = Cl and/or SnCl3; ArNC =p-methoxyphenyl isocyanide) and the cationic complex [Fe(SnCl3)(ArNC)5]+ClO4– have been recorded and assigned. Splitting of the excited 1T1g state has been observed for the first time in FeII low-spin compounds. As predicted previously, the splitting of the 1T1 state (Δ1T1) correlates with the 57Fe quadrupole splitting. In the compounds containing the SnCl3 ligand, the Sn has a formal oxidation state of SnII, yet the 119Sn Mössbauer centre shift (c.s.) lies in the ‘SnIV region’. The value of the Sn Mössbauer c.s. for assigning the oxidation state and valency of Sn in Sn-metal compounds is discussed.

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Article type: Paper
DOI: 10.1039/DT9720001209
Citation: J. Chem. Soc., Dalton Trans., 1972,0, 1209-1211
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    Correlation of FeII low-spin Mössbauer quadrupole splittings and the 1T1 splitting in the electronic spectra of iron(II) isocyanide compounds. The oxidation state of tin in the tin trichloride ligand

    G. M. Bancroft and K. D. Butler, J. Chem. Soc., Dalton Trans., 1972, 0, 1209
    DOI: 10.1039/DT9720001209

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