Ligand-variation studies on the Mössbauer effect in low-valency iron organometallic complexes: the LFe(CO)4 and L2Fe(CO)3 series

Abstract

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 |ΔE_q|.