What is the formula of vibrational frequency?
The frequency is given by: ν ― = 1 2 π C K μ , squaring both sides, we get: or, ν ― 2 × 4 π 2 C 2 × μ = K Substituting the values, we get: K = {2309 cm-1 × 4 × 9 × (3.14)2 × (3.0 × 1010 cm/s)2 × 127 × 10-7 } / 128 = 313.56 N m-1.