Theoretical study of chiral discrimination in the hydrogen bonding complexes of the hydrazine dimer

In this work, the discrimination of different chiral forms of the hydrazine dimer were investigated using Density Functional Theory (DFT) and second-order Moller-Plesset Perturbation (MP2) theory at basis set levels from 6-31g to 6-31 + + g(d,p). Four chiral structures were studied. The optimized geometric parameters, interaction energies, and chirodiastatic energy for various isomers at different levels were estimated. Finally, the solvent effects on the geometries of the hydrazine dimers were also investigated using self-consistent reaction-field (SCRF) calculations at the B3LYP/6-31 + + g(d,p) level. The results indicate that the polarity of the solvent has played an important role in the structures and relative stabilities of different isomers. (C) 2004 Wiley Periodicals, Inc.