Applet Launcher Applet 1 Applet 2 Applet 3 Applet 4 Applet 5 Applet 6   Rotational Raman Spectroscopy Effect of Bond Length page 1 of 1     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   Altering the bond length of any diatomic correspondingly alters its moment of inertia. The inter-nuclear distance therefore affects the spectra of different molecules. Drag the right hand of the two atoms visible in applet 1. Note how the bond length of affects the positions of the energy levels. Q2.1 Derive the relationship between the bond length and the rotational energy levels. Q2.2 Record values for one particular Stokes or Anti-Stokes line at a range of bond lengths. Plot an appropriate straight line graph to show demonstrate the relationship between rotational energy level to the bond length. Q2.3 Does the graph confirm the relationship you derived?     << previous page www.physchem.ox.ac.uk next page >>