Effect of the Structure of Carboxylate Ligands on the X-Ray Photoelectron Spectral Parameters of Trinuclear Heterometallic Complexes [Fe2MO(O2CR)6(H2O)3](H2O)3 (M = Co, Ni; R = CH3, CCl3)

An anomalously large difference was found in the energies of the 2p, 3s, and 3p lines in the X-ray photoelectron spectra for all metal ions in complexes [Fe2MO(O2CCH3)6(H2O)3](H2O)3 and [Fe2MO(O2CCCl3)6(H2O)3](H2O)3(M = Co, Ni). The observed line shifts were explained in the framework of an electrostatic model considering the change in the interaction energy of the electrons of metal atoms and the charge distribution of the peripheral fragments of the complexes. © 2016, Springer Science+Business Media New York.