Final Flashcards
(21 cards)
t-butyl chloride: Why was the anhydrous magnesium sulfate used?
Dry the product
Cyclohexanone: What IR peak is gone from the product but was present in the reactant?
Alcohol peak
Cyclohexanone: what new IR peak would appear in the product but was absent in the reactant?
Ketone peak
Cyclohexanol: how does the IR spectrum of the starting Cyclohexanone change when product cyclohexanol forms?
Ketone peak gone, alcohol peak appears
Cyclohexanol: what substance is extracted into the ether layer after the reaction is over?
The product, Cyclohexanol
Cyclohexanol: why was anhydrous magnesium sulfate used?
Dry the product
Diels-Alder reaction: what is the purpose of heating the dicyclopentadiene before addition of maleic anhydride?
Dicyclopentadiene breaks into two cyclopentadiene
Diels-Alder reaction: what happens to the cyclopentadiene if it it allowed to stand too long?
It will go back to dicyclopentadiene
Methyl nitrobenzoate: why is sulfuric acid used?
Speed up reaction
Methyl nitrobenzoate: why is the product washed with water?
Gets rid of acids
Methyl nitrobenzoate: why is the product washed with methanol?
Remove small amount of isomer
Bromination of acetanilide: besides bromination at the para position, what small amount of other product might form when Br2 reacts with acetanilide?
Br at the ortho position
Bromination of acetanilide: after the reaction, sodium bisulfite is added to react with what leftover substance?
Destroys the bromine
Grignard reaction: how will the IR spectrum of alcohol product differ from the ketone reactant?
Alcohol product will have peak at 3300
Ketone reactant peak at 1710 will disappear
Grignard reaction: the glassware and reagents must be water free. With what substance will water react resulting in a unwanted side reaction?
Alkane
Grignard reaction: what substance is extracted into the ether layer?
Organic layer/ alcohol product
Azo dye: the diazonium salt in aqueous medium is kept cold and used right away. What unwanted side reaction takes place with water?
Reacts with water and creates a phenol
Azo dye: the reaction mixture is made basic at the end of the experiment converting I into II and causing II to precipitate from the aqueous medium. Why is II less soluble in water than I?
Charges make product more water soluble
Why is a solvent containing a solid product often cooled before filtering the solid product?
Less solid will dissolve
Maximizes yield
After filtering on a Büchner funnel, why is the solid washed with a cold solvent?
Get rid of impurities
t-Butyl chloride: Why was 5% aqueous sodium carbonate added to the organic layer?
Neutralizes the acid
