Abstract
The far infrared spectra (750 to 50 cm�¹) of certain BF₃-amine complexes in the solid state were obtained. The vibrational assignments have been made for the low frequency modes of BF₃NH₂CH₃ and BF₃NH(CH₃)₂, both of which have C[subscript]s symmetry. They have been compared with the published assignments for BF₃NH₃ and BF₃N(CH₃)₃, both of which have C[subscript]3v symmetry. The effect of lowering the symmetry from C[subscript]3v to C[subscript]s has been discussed. The PMR spectra of these same complexes were obtained in appropriate solvents. In BF₃NH₂CH₃ and BF₃NH(CH₃)₂ the methyl proton spectra were found to be coupled to the proton on the nitrogen and to the boron nucleus. In BF₃--N(CH₃)₃, in addition to the boron nucleus, the methyl protons appeared to be coupled to the fluorine nuclei with a coupling constant of about 0.8 cps. Far infrared solid state studies were also made on a number of R₂CuCI₄ and R₂SbBr₅ complexes, each having a number of different cations. Frequencies are reported in the range 650 to 50 cm�¹. The region from 600 to 300 cm�¹ displayed bands associated with the organic cation, while the region from 300 to 50 cm�¹ displayed predominantly the bands of the anion. While the spectrum of the ...
Clague, Alfred Derek Hunter (1967). Far infrared, Raman and NMR spectroscopic studies of molecular structures and properties. Doctoral dissertation, Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -179115.