Applet Launcher Applet 1 Applet 2 Applet 3 Applet 4 Applet 5 Applet 6   Rotational Raman Spectroscopy Spectrum of Nitrogen 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   Earlier in the practical it was shown that centrifugal distortion breaks down the 2B(3J+2) position of spectral lines. So the rotational constant cannot be calculated as easily as for the rigid rotor model. Bring up Applet 4. This is the rotational Raman spectrum of gas at 2000K. Q6.1 Rearrange F(J+2) - F(J) = 2B(2J+3) - 4D(2J+3)(J+3J+3) into the form y = mx + c, so that m is a function of D only. Q6.2 By plotting a suitable graph, calculate the values of B and D for . Q6.3 What is the ortho:para intensity ratio for the spectrum? Q6.4 What is the nuclear spin of a N nucleus? Q6.5 How would the spectrum of differ from that of a sample of N-N gas? Explain your answer. Would you expect N-N to produce a pure rotational spectrum?     << previous page www.physchem.ox.ac.uk next page >>