3. Give the IUPAC name (indicating stereochemistry when necessary) for the following four alkenes: HO Give detailed Solution

prepaer the follwing compounds

4. The enthalpies, AH°, for the hydrogenation of three alkenes are shown below: Alkene A: -50 kcal/mole Alkene B: -60 kcal/mole Alkene C: -70 kcal/mole Which alkene is the least stable and why?

B. Aliphatics and Alkyl Halides Name the following compounds. 2. CH3-CH₂-CH-CH3 1 I-C-CH3 | CH3

(a) • Consider E/Z stereochemistry of alkenes. • Do not show stereochemistry in other cases. • You do not have to explicitly draw H atoms. Draw a structural formula for the alkene: 2-methyl-2-heptene. MUIL Templates Sn [F ? Ⓡ ChemDoodle (b) Draw a structural formula for the alkene: (E)-1-chloropropene.

9. Read very carefully: Alkenes can be OXIDIZED to form carbonyl compounds (- C=0) (see example below). KNOWING this, how would you distinguish the following two alkenes by using this OXIDATIVE reaction? R-CH=CHCH3 à (oxidation) R -CO,H + CH;CO,H BOTH undergo OXIDATION

Give the systematic (IUPAC) name for the following compounds. Include stereochemistry in the name ONLY FOR THOSE STRUCTURES THAT ALLOW YOU TO DETERMINE STEREOCHEMISTRY. In other words, describe the stereochemistry if the molecule is shown as a Fisher projection, or as a perspective formula, or if an alkene is drawn with the correct stereochemistry representation

5 Name and draw structural formulas for all alkenes to fo with the molecular formula C5H₁0. As you draw these alkenes, remember that cis and trans isomers are dif- ferent compounds and must be counted separately. 10°