3. The following alkenes can be prepared by dehydration of an appropriate alcohol. Show the structure of the alcohol in each case. If the alkene can arise from dehydration of more than one alcohol, show all possibilities. CH3CH2 C=CH2 CH3CH2 a) сH-с—снCH,CHз CH3 b) c) 3-hexene d) 1,3-butadiene

Draw a structural formula for 4-ethylnonane. You do not have to explicitly draw H atoms. still CH4 Ⓒ ? ChemDoodleⓇ

An alkene forms 2-methylpropane when catalytically reduced and 1,2-dichloro-2-methylpropane when treated with Cl₂. Draw the structural formula of the alkene. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • In cases where there is more than one answer, just draw one. / √ [F ? ChemDoodle

CH3 CH;-C=C-CH,-CH-CH; What is the correct IUPAC name for the compound above? O 1-isopropyl-2-butyne O 2-methylhexene O 2-methylhexyne 5-methyl-2-hexyne

10. Label the following functional groups. R-N R OH H `R' (a). (b) (c) O=U R

1,4-Pentadiene (CH2=CH-CH2-CH=CH2) is a liquid at room temperature and has a density of 0.66 g/mL and molar mass of 68.12 g/mol. In a laboratory experiment, 3.80 mL of this compound was treated with 4.80 mL of conc. H2SO4 (100% w/w; molar mass 98.08 g/mol). Note that the density of conc. H2SO4 is 1.84 g/mL. The resulting sulfate ester was then treated with 1.20 mL of water (molar mass 18.02 g/mol) affording, after work- up, 2,4-pentanediol (molar mass 104.15 g/mol) as the crude product. The crude product was then purified by simple distillation, which yielded 2.00 g of pure product.   a.  Provide a balanced chemical equation to show the reaction between 1,4-pentadiene and sulfuric acid. Do not use molecular formulas in the chemical equation except for sulfuric acid.   b.  What reactant is the limiting reagent in this chemical equation? Show calculations to support your answer.

Part a and b

1. a) Write the reaction of 1-hexene with HBr. b) Write the reaction of 1-hexene with Br2.