Sg. Davies et al., PHOTOINDUCED CONFIGURATIONAL INSTABILITY AT IRON IN THE AMINOCARBENE COMPLEXES [(ETA(5)-C5H5)FE(CO)(L)(=C(NHR2)(CH2R1))]-(BF4), Perkin transactions. 2, (5), 1998, pp. 1147-1152
Photoinduced epimerisation of chiral iron aminocarbene complexes of th
e type [(eta(5)-C5H5)Fe(CO)(L)-{=C(NHR2)(CH2R1)}]+BF4-[L = PPh3, P(p-t
olyl)(3); R-1 = H, Me; R-2 = CH2Ph, CH(Me)Ph] has been observed in 10%
H2O-MeOH, MeOH, EtOH, THF and CH2Cl2 at room temperature. Exchange ex
periments have unambiguously established that reversible phosphine lig
and (L) dissociation rather than reversible loss of the carbon monoxid
e ligand is the only mechanism operating.