Question

KCl has an intense line at 278 cm in IR spectrum
Calculate the torce constant of the molecule (2)​

Answer 1

Answer:

The frequency (in units of Hz) corresponding to a line in a absorbance spectrum of a molecule is equal to,

Here,is the reduced mass of the molecule and k is the force constant. If the frequency is given in units of, the frequency can be converted to units of Hz by using the relation, where represents the frequency in units of and c is the speed of light.

If the frequency in units of is given and the molecule is known, the above expressions can be combined to yield an expression for the force constant.

Explanation:

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