Vibrational Spectra and Structure of Polyatomic Molecules

absorption absorption spectrum angle anharmonicity antisymmetrical approximation assignments bond constant bond distances C₂H calculated Chap Chem cm-¹ cm-1 band coefficients components D. M. Dennison depolarized determinantal equation electric electron diffraction electron diffraction measurements fundamental frequencies Glockler groups H atoms harmonic hence ibid infrared infrared spectrum intensities interaction isotope Jour k₁ k₂ Kohlrausch linear matrix elements Mecke molecule moment of inertia normal coordinate normal vibrations observed frequencies obtained oscillator perpendicular perturbation Phys Physik plane polarized potential constants potential function Proc Q branch quantum numbers quencies Raman effect Raman lines Raman spectrum resonance rotational lines Schrödinger equation selection rules shown studied symmetrical rotator symmetrical vibrations symmetry axis symmetry properties theory tion torsional trans transitions type bands v₁ v₂ valence force potential values vibration v₁ vibration-rotational bands vibrational spectra wave functions Zeits