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The Mn3s X-ray photoelectron spectra of manganese atoms in mono-, bi-, tri-, and hexanuclear trimethylacetate Mn complexes and MnIICl 2, MnIIIOOH, MnIVO2. ionic compounds were measured. The 3s spectra of the manganese atoms in MnII, MnIII, and MnIV valent states were calculated within the isolatedion approximation. The relationship between the characteristics of the Mn3s spectra and the magnetic moments of the manganese ions in the complexes is discussed.

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.

X-ray photoelectron Fe3s and Fe3p spectra are employed to study the electron structure and the spin magnetic state of bi-, tri-, and hexa-nuclear trimethylacetate iron complexes. Assignment of the spectra is performed based on an isolated-ion Pauli-Fock calculation of Fe3s and Fe3p spectra of the Fe atoms in bi-and tri-valent states. Nonequivalent FeIII and FeII atoms are detected in tri-and hexa-nuclear complexes. Paramagnetic-limit molecular magnetic moments are calculated using effective atomic magnetic moments obtained from spin-sensitive spectral characteristics. Comparison of those values with the magnetic measurements data demonstrates antiferromagnetic interaction within the complexes. © 2010 Elsevier B.V. All rights reserved.

Binuclear pivalate complexes of 3d transition metals (manganese, iron, cobalt, and nickel) with the same ligand environment and a lantern structure have been studied by X-ray photoelectron spectroscopy. The M2p, M3s, C1s, O1s, and N1s X-ray photoelectron spectra have been examined. A redistribution of elec- tron density in the OCO group has been revealed. It has been shown that the theory fits the experimental data on the energy separation between the high- and low-spin components in the M3s spectra and between the spin doublet components in the M2p spectra. It has been demonstrated that the iron, cobalt, and nickel com- plexes are paramagnetic at room temperature, whereas the manganese complex exhibits antiferromagnetic properties. There is a correlation between the size of the 3d subshell of the transition metal atom and the M- O and M-N bond lengths. © Pleiades Publishing, Ltd., 2012.