Figure 3
Four stable minima found at the MP2 level. MEP profiles (−150 kJ mol−1), geometrical parameters of hydrogen bonds for conformations (3) and (4) (D: distance between H-donor and H-acceptor atom; d: distance between H atom and H-acceptor atom and θ: angle between H-donor atom, H atom and H-acceptor atom), dihedral angle values for T1 and T2, and MP2 Gibbs free relative energies for each conformer are also given. Picture produced with GaussView5.0 (Gaussian Inc., 2009). |