Hydrogen Deformation Vibrations

The CH, CH2 and CH3 deformation frequencies in various organic compounds and the NH3 deformation frequencies in metal ammine complexes have been calculated based on the Urey-Bradley field. The fact that diagonal terms of G-matrices for these vibrations are much larger than the cross terms makes the approximate calculation quite easy. The frequency range of each of these vibrations has been tabulated and their specific features have been pointed out, which will aid in the assignment of the frequencies observed for many organic compounds and metal ammine complexes.