1. the stereochemistry of alkenes can often be determined by measuring the coupling constant between the vinylic hydrogens due to differing magnitudes with respect to the stereochemistry. for cis-alkenes this value generally falls in the 6-12 hz range while trans-alkenes usually exhibit coupling contants in the 12-18 hz range. however, this difference would not be useful in determining the stereochemistry for the e/z stilbene in this experiment. explain

2.although the stereochemistry of the alkene cannot be determined from an nmr spectrum, it can be deduced from the stereochemistry of the final dibromide product (see chapter 7 in carey). 1) clearly depict all of the stereoisomers for the final dibromide that could be formed from each stilbene isomer; 2) for the dibromide products, clearly label each chiral carbon with the appropriate r/s designation; 3) be sure to identify which dibromides form from which stilbene; 4) when two chiral centers are generated in each bromination and theoretically four products could potentially be observed. in actuality, only racemic or meso product(s) formed in each case. explain why.

3. why do you think excess 3-sulfolene was used instead of a 1.00 equivalents in diels-alder reaction lab?

4. sulfolene decomposes to give 1,3-butadiene and sulfur dioxide when heated. 1) calculate the volume of so2 in liters produced if 0.850 g of 3-sulfolene is heated at 160.0oc. assumed the air pressure in our lab is 1.00 atm.