**************** The 13th., Lab Seminar **************************** Title: First-Principles Molecular Dynamics Evaluation of Thermal Effects on the NMR J Spin-Spin Coupling Aurelien de la Lande, Catherine Fressige, Helene Gerard, Jacques Maddaluno and Olivier Parisel Chem. Eur. J., 2007, 13, 3459. Speaker: Yusuke Ohta Date: Thu. Dec. 6th, 2:30 pm Abstract: Car-Parrinello (CP) MDs were applied to sample conformations of various models of organolithium aggregates which are chosen to estimate J NMR coupling constants. The results show that the deviations from the values computed using static (optimized) geometries are small. In the case of vinyllithium dimer, rotation of the vinyl chain is observed. For the trisolvated methyllithium monomer, partial decoordination of solvating dimethyl ether is observed. ***********************************************************