Identification of intermediates in the photosubstitution of [(η-C5H5)Fe(CO)2]2, using time-resolved I.R. spectroscopy: reaction kinetics of [(η-C5H5)2Fe2(µ-CO)3] with acetonitrile and phosphines

Abstract

Using time-resolved i.r. spectroscopy on a 10 µs time-scale, [(η-C₅H₅)₂Fe₂(µ-CO)₃](C) has been identified as the principal intermediate in photosubstitution of [(η-C₅H₅)Fe(CO)₂]₂ and the activation parameters have been measured for the reaction of (C) with PBuⁿ₃, PPh₃, and MeCN in cyclohexane solution; (C) does not react with P(o-tolyl)₃ or tetrahydrofuran.