X-Ray photoelectron spectra structure of uranium compounds stipulated by electrons of the inner valence molecular orbitals (IVMO)

On the base of XPS study and theoretical calculations it is shown that under certain conditions molecular orbitals (MO) can form in a rather wide range of binding energies (from 0 up to 50 eV) in different uranium compounds. Under the favorable conditions the IVMO may form in all actinide compounds. The XPS spectra fine structure stipulated by IVMO electrons allows to judge about degree of participation of filled AO electrons in the chemical bonding, about the structure of considered atom close environment and the bond lengths in compounds. For amorphous compounds the obtaining of such data on the base of X-ray structure analysis is restricted. The summary contribution of IVMO electrons to the absolute value of the chemical bonding is comparable with the corresponding value of OMO electrons contribution to the atomic bonding. This fact is very important and new in chemistry