Experimental and computational studies of the structure and vibrational spectra of aminomethyl-dimethyl-phosphine oxide and its 15N labeled isomer.
Infrared (4000-100 cm(-1)) spectra of aminomethyl-dimethyl-phosphine oxide and 15N-aminomethyl-dimethyl-phosphine oxide have been measured. Geometric parameters (bond distances and angles), net electronic charges and vibrational spectroscopic data of both compounds calculated at various levels of theory (B3LYP/6-31G* and Moeller-Plesset perturbational theory (MP2)/6-31G*) are reported. The theoretical spectral results are discussed mainly in terms of comparison with infrared (4000-100 cm(-1)) spectral data. Better coincidence was achieved with the frequencies calculated at the MP2/6-31G* level: the standard deviation is 16 cm(-1). The calculated isotopic frequency shifts, induced by the 15N labeling, are in good accordance with the measured ones. Complete vibrational assignment is made with the help of MP2 force field calculations. Data obtained here are used to reassign some of the vibrational frequencies.
Kolev
Tsonko M
TM
Institute of Organic Chemistry, Bulgarian Academy of Sciences, 1113 Sofia. kolev@orgchm.bas.bg
Varbanov
Sabi G
SG
Stamboliyska
Bistra A
BA
Hägele
Gerhard
G
Russeva
Elena D
ED
D000588:Amines / Q000737:chemistry; D003201:Computers; D006838:Hydrocarbons; D007536:Isomerism; D008697:Methane / Q000031:analogs & derivatives* / Q000737:chemistry; D008968:Molecular Conformation; D009587:Nitrogen Isotopes; D010087:Oxides / Q000737:chemistry*; D010720:Phosphines / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D055672:Static Electricity; D014732:Vibration
D000588:Amines; D006838:Hydrocarbons; D009587:Nitrogen Isotopes; D010087:Oxides; D010720:Phosphines; C498006:aminomethyl-dimethyl-phosphine oxide; C030011:carbene; D008697:Methane