Question
Draw the products formed when both cis- and trans-2-butene are treated with $4Os0_4$, followed byhydrolysis with $NaHS0_3$ $+ H_20$. Explain how these reactions illustrate that syn dihydroxylation isstereospecific.
Step 1
Cis-2-butene: \[ \begin{array}{cccc} H & \equiv & H \\ | & & | \\ H-C-C=C-C-H \\ | & & | \\ H & \equiv & H \end{array} \] Trans-2-butene: \[ \begin{array}{cccc} H & \equiv & H \\ | & & | \\ H-C-C=C-C-H \\ | & & | \\ H & \equiv & H \end{array} \] Show more…
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Draw the products formed when both cis- and trans-but-2-ene are treated with $\mathrm{OsO}_{4}$, followed by hydrolysis with $\mathrm{NaHSO}_{3}+\mathrm{H}_{2} \mathrm{O}$. Explain how these reactions illustrate that syn dihydroxylation is stereospecific.
a. Draw the product or products that will be obtained from the reaction of cis -2-butene and trans-2-butene with each of the following reagents. If a product can exist as stereoisomers, show which stereoisomers are formed. 1. $\mathrm{HCI}$ 2. $\mathrm{BH}_{3} / \mathrm{THF}$, followed by $\mathrm{HO}^{-}, \mathrm{H}_{2} \mathrm{O}_{2}, \mathrm{H}_{2} \mathrm{O}$ 3. a peroxyacid 4. $\mathrm{Br}_{2}$ in $\mathrm{CH}_{2} \mathrm{Cl}_{2}$ 5. $\mathrm{Br}_{2}+\mathrm{H}_{2} \mathrm{O}$ 6. $\mathrm{H}_{2}+\mathrm{Pd} / \mathrm{C}$ 7. $\mathrm{H}_{2} \mathrm{O}+\mathrm{H}_{2} \mathrm{SO}_{4}$ 8. $\mathrm{CH}_{3} \mathrm{OH}+\mathrm{H}_{2} \mathrm{SO}_{4}$
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