aGazi Universitesi K?r?ehir Fen-Edebiyat Fakültesi Fizik Bölümü, A??kpa?a Kampüsü, 40100 K?r?ehir, Turkey
bGazi Universitesi Fen-Edebiyat Fakültesi Fizik Bölümü, 06500,Teknikokullar, Ankara, Turkey
Abstract:
The molecular geometry and vibrational frequencies of lepidine and 2-chlorolepidine in the ground state have been calculated by using the Hartree–Fock and density functional methods (B3LYP) with 6-31G (d) as the basis set. The optimized geometric bond lengths obtained by using B3LYP and bond angles obtained by HF that correspond to the experimental values of 2-cl-lepidine molecule were given. Comparison of the observed fundamental vibrational frequencies of lepidine and 2-chlorolepidine, and calculated results by density functional B3LYP and Hartree–Fock methods indicates that B3LYP is superior to the scaled Hartree–Fock approach for molecular vibrational problems.