Molecular structure and charge distribution in organometallics of the 4f and 5f elements. I. Dipole moment and charge distribution of the actinoid(IV) tetracyclopentadienides, An(C5H5)4

Article abstract of DOI:10.1016/0925-8388(91)90013-L

The dipole moments of the tetracyclopentadienides, An(C₅H₅)₄, of the lighter actinoids thorium, uranium and neptunium were measured in benzene solution. Although the compounds in the solid state have a quasi-T_d molecular symmetry their dipole moments are not zero, owing to lowering of the molecular symmetry. The origin of the nonzero dipole moments is discussed.