HCl Vibrational-Rotational Spectroscopy

Adapted from Experiment #38 (Shoemaker, Garland, Nibler, 1989)

1) Sample preparation

2) IR Gas-phase data collection

3) Spectrum analysis including analysis of state populations.

https://en.wikipedia.org/wiki/Isotopes_of_chlorine

atomic masses in amu

Reduced mass, "mu" = (m1*m2)/(m1+m2)

1H 1.007825 amu (99.9885%)

35Cl 34.968853 amu (75.78%)

37Cl 36.965903 amu (24.22%)

conversion factor: 1.66054e-27 kg/amu

4) Plot "m" (x) vs the frequency (y) and fit to a second order polynomial.

5) The second order polynomial will take the form of equation 9 from (Exp 38, Shoemaker), hence you can determine alpha_e, and then of B_e.

6) Using equation 5 and 3, then solve for "r" the average internuclear separation.