Applet Launcher Applet 1 Applet 2 Applet 3 Applet 4 Applet 5 Applet 6   Rotational Raman Spectroscopy Isotopic Substitution page 1 of 2     Practical Navigator Introduction The Raman Effect Experimental Techniques 1. Rotational Raman Spectroscopy Interpreting the Spectrum Effect of Bond Length Centrifugal Distortion Intensities of Spectral Lines Nuclear Spin Statistics 2. Real Diatomic Molecules Temperature Spectrum of Nitrogen Isotopic Substitution Nuclear Spin Statistics Predict the Spectrum of Oxygen   In this next experiment you will investigate the influence of isotopic substitution on the rotational Raman spectrum. Launch Applet 5. Q7.1 Deuterium is twice a massive as hydrogen. How would you expect this to affect the spectra? Q7.2 Use the applet to calculate the bond length of molecular hydrogen. Q7.3 Assuming that the H-H and D-D bond lengths are equal, derive a relationship between the positions of corresponding lines in the spectra of hydrogen and deuterium. Q7.4 Use the applet to test the validity of this assumption. Try and give explanation for this finding. Q7.5 Calculate the bond length for deuterium. _H has I = ½ so has identical nuclear spin statistics to the hypothetical molecule .     << previous page www.physchem.ox.ac.uk next page >>