ESE-ENDOR Study and DFT Calculations on Oxovanadium Compounds: Effect of Axial Anionic Ligands on the 51V Nuclear Quadrupolar Coupling Constant. - Aznar, C. P.; Deligiannakis, Y.; Tolis, E. J.; Kabanos, T.; Brynda, M.; Britt, R. D. (Journal of Physical Chemistry A, 2004)