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Owing  to  the  importance  of  quantum-chemical  descriptors  for  a QSAR/QSPR,  eleven  parameters  were  calculated  by  using  MOPAC  of  the  option  of  SYBYL  version  6.1  (Tripos  Associates,  1699  S.
Hanley  Road,  Suite  303,  St.  Louis,  MO63144).  These  descriptors  are  the  energies  of  highest occupied  molecular  orbital  (HOMO),  lowest  unoccupied  molecular  orbital  (LUMO),  charge  density on atom N, charge density on atom C connected to NH2, dipole moment, net molecular charge,  molecular  total  energy,  nucleus-nucleus  repulse  energy,  ionization  potential,  electronic
energy, and heat of formation.
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[ Last edited by lei0736 on 2009-11-24 at 20:35 ]
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