What is the general formula for the calculation of the number of principal vibrations of a molecule that extends in all three directions (e.g. cyclohexane)? N is the number of atoms that form the molecule.

Question

Quizplus · Accepted Answer

For a molecule that extends in all three directions, the general formula for the calculation of the number of principal vibrations is 3N-6. This is because there are 3N degrees of freedom (3 for each atom) but 6 of these are translational and rotational modes that do not contribute to principal vibrations. Therefore, the answer is 3N-6.

What Is the General Formula for the Calculation of the Number