Ligand-variation studies on the Mössbauer effect in low-valency iron organometallic complexes: the LFe(CO)<sub>4</sub>and L<sub>2</sub>Fe(CO)<sub>3</sub>series
作者:William E. Carroll、Francis A. Deeney、John A. Delaney、Fergus J. Lalor
DOI:10.1039/dt9730000718
日期:——
Room-temperature Mössbauer parameters have been measured for seven LFe(CO)4 compounds and fifteen complexes of the type L2Fe(CO)3 where L is an organophosphine or similar ligand. The trend in isomer shift values has been interpreted in terms of a dominant σ-interaction synergistically buttressed by π-bonding. A quasi-linear correlation (R= 0·92) has been found between δ and |ΔEq|.
preparation of KHCr(CO)5 is described. The use of a potassium cation in the coordination chemistry of the [HFe(CO)4]−anion is completed and extended to the coordination chemistry of the [HCr(CO)5]−anion: CO-substitution by phosphites, phosphines and phosphinites, and H-abstraction by aminophosphines. Most of the observed differences in reactivity between KHFe(CO)4 and KHCr(CO)5 can be rationalized