Journal
JOURNAL OF MOLECULAR STRUCTURE-THEOCHEM
Volume 771, Issue 1-3, Pages 105-110Publisher
ELSEVIER
DOI: 10.1016/j.theochem.2006.03.021
Keywords
lanthanide; actinide; quantum chemistry; nitrogen ligand
Categories
Ask authors/readers for more resources
Relativistic density functional theory calculations are reported for actinide(III) (An = U, Am, Cm) and lanthanide(HI) (Ln = La, Nd) complexes with tridentate aromatic nitrogen ligands. Calculations have been performed on 2,2 ':6 ',2 ''-terpyridine (Terpy) complexes with various species in the first coordination sphere of the metal ion besides one Terpy ligand (H2O, Cl- and NO3-) and on bis(1,2-4-triazin-3 -yl)pyridine (Btp) complexes with various susbtituents attached to the triazine rings (CH3, OCH3 and CN). Metal-ligand bonds in trivalent lanthanum, neodynium, americium and curium complexes are predominantly ionic, and significant variations are found in metal-nitrogen bond lengths when the total charge of the complexes is changed by the number of counterions or when the charges on the coordinating nitrogen atoms are altered by substituents. Uranium-ligand bonds are more covalent and smaller variations are found in uranium-nitrogen bond distances. The most remarkable effect on uranium-ligand bonds is obtained by attaching CN groups to the Btp, uranium(5f)-to-Btp(pi*) back-bonding is enhanced and uranium-nitrogen bonds are shortened. (c) 2006 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available