Lab 4: electrophilic aromatic iodination of vanillin

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Last updated 6:16 AM on 3/3/26
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7 Terms

1
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what is bleach

the oxidant

2
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why dont you want to add bleach too fast

to avoid making a reactive iodide species

3
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what does vanillin and ethanol and potassium iodid and bleach make

reddish brown colored electrophilic iodide

4
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what does NaHSO3 do

acts as the reducing reagent during the aqueous workup- consumes excess bleach

5
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what does I M HCl do

takes out base during acid work up

6
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why wash with cold water and ethanol after vacuum filtration

to take away water soluble impurities and byproducts

7
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why dissolve crude product and heat w isopropyl alcohol?

to purify the product by recrystallization, allowing impurities to remain in solution.