. How many stereoisomers are formed in this Diels-Alder reaction ? Explain why. 2. Identify the Diene and the dienophile in the reaction. 3. The MW of the expected product is 319.4 g/mol. However, the mass spectrometry analysis produces a peak at 320.4 g/mol. Explain why the MS analysis differs in 1 amu as compared to the product formed. 4. Give two significant signals that you would expect to see in the IR spectra of the final product. 5. Why is this procedure considered a green chemistry reaction ? 6. From the given 1H-NMR spectra, provide an explanation for the multiplicity and chemical shift of the following signals: a) CH3 20 (blue in the spectra, singlet, d=2.5 ppm) b) CH 16 (blue in the spectra, doublet, d=4.75 ppm) c) CH 15 (yellow in the spectra, doublet, d=5.1ppm)