A Theoretical Study on Applying Conformational Analysis of 2-Halo-2-Oxo-1,3,2-Dioxaphosphorinanes
(ندگان)پدیدآور
Azarakhshi, FatemehFarhadyar, NazaninKhaleghian, Mehrnooshنوع مدرک
TextResearch Paper
زبان مدرک
Englishچکیده
The quantum-chemical calculations on the conformational properties of 2-flouro-2-oxo- 1,3,2-dioxaphosphorinane (1), 2-choloro-2-oxo-1,3,2-dioxaphosphorinane (2) and 2-bromo- 2-oxo-1,3,2-dioxaphosphorinane (3) have been investigated by means of ab initio molecular orbital (HF/6-311+G**) and hybrid density functional theory (B3LYP/6-311+G**) based methods and Natural Bond Orbital (NBO) interpretation in solid state was performed. Geometrical analysis supports clearly the participation of hyperconjugative endo-anomeric (LPO→σ*P-X) effect in the stabilization of axial series of compounds and the participation of exo-anomeric (LPX→σ*P-O) effect in the stabilization of the equatorial phosphinanes in chair conformations. The stereoelectronic effects associated with bonding-anticoding delocalization electron are more significant for the explanation of the conformational behavior of compounds 1-3 than the dipole-dipole interaction effects.
کلید واژگان
Ab initioDioxaphosphorinanes
Natural Bond Orbital
density functional theory
Generalized Anomeric Effects
Stereoelectronic effects
شماره نشریه
1تاریخ نشر
2016-01-011394-10-11
ناشر
Islamic Azad University, Karaj branchشاپا
2008-38152008-3823