All Publications

in year '2012'

February 24, 2012
The conformational profiles of unbound all-trans and 9-cis retinoic acid (RA) have been determined using classical and quantum mechanical calculations. Sixty-six all-trans-RA (ATRA) and 48 9-cis-RA energy minimum conformers were identified via HF/6-31G* geometry optimizations in vacuo. Their relative conformational energies were estimated utilizing the M06, M06-2x, and MP2 methods combined with the 6-311+G(d,p), aug-cc-pVDZ, and aug-cc-pVTZ basis sets, as well as complete basis set MP2 extrapolations using the latter two basis sets....