title: Aromatic dipeptides and their salts--solid-state linear-dichroic infrared (IR-LD) spectral analysis and ab initio calculations.
abstract: Stereo-structural analysis and IR-bands assignment of the aromatic dipeptides L-tryrosyl-L-phenylalanine (Tyr-Phe), L-phenylalanyl-L-tyrosine (Phe-Tyr) and their hydrochloride salts have been carried out by means of IR-LD spectroscopy of oriented as nematic liquid crystal suspension solid samples. The experimental data are compared with known crystallographic ones and theoretical predicted geometries at RHF/ and UHF/6-31G**.
authors.affiliation: Sofia University St. Kl. Ohridski, Faculty of Chemistry, 1164 Sofia, Bulgaria. ahbi@chem.uni-sofia.bg
authors.forename: Bojidarka B
authors.initials: BB
authors.lastname: Ivanova
mesh_terms: D004151:Dipeptides / Q000737:chemistry*; D008956:Models, Chemical; D008968:Molecular Conformation; D010649:Phenylalanine / Q000737:chemistry; D012492:Salts / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods*; D014443:Tyrosine / Q000737:chemistry
chemical_list: D004151:Dipeptides; D012492:Salts; D014443:Tyrosine; D010649:Phenylalanine