Final

Question 1

t-butyl chloride: Why was the anhydrous magnesium sulfate used?

Answer 1

Dry the product

Question 2

Cyclohexanone: What IR peak is gone from the product but was present in the reactant?

Answer 2

Alcohol peak

Question 3

Cyclohexanone: what new IR peak would appear in the product but was absent in the reactant?

Answer 3

Ketone peak

Question 4

Cyclohexanol: how does the IR spectrum of the starting Cyclohexanone change when product cyclohexanol forms?

Answer 4

Ketone peak gone, alcohol peak appears

Question 5

Cyclohexanol: what substance is extracted into the ether layer after the reaction is over?

Answer 5

The product, Cyclohexanol

Question 6

Cyclohexanol: why was anhydrous magnesium sulfate used?

Answer 6

Dry the product

Question 7

Diels-Alder reaction: what is the purpose of heating the dicyclopentadiene before addition of maleic anhydride?

Answer 7

Dicyclopentadiene breaks into two cyclopentadiene

Question 8

Diels-Alder reaction: what happens to the cyclopentadiene if it it allowed to stand too long?

Answer 8

It will go back to dicyclopentadiene

Question 9

Methyl nitrobenzoate: why is sulfuric acid used?

Answer 9

Speed up reaction

Question 10

Methyl nitrobenzoate: why is the product washed with water?

Answer 10

Gets rid of acids

Question 11

Methyl nitrobenzoate: why is the product washed with methanol?

Answer 11

Remove small amount of isomer

Question 12

Bromination of acetanilide: besides bromination at the para position, what small amount of other product might form when Br2 reacts with acetanilide?

Answer 12

Br at the ortho position

Question 13

Bromination of acetanilide: after the reaction, sodium bisulfite is added to react with what leftover substance?

Answer 13

Destroys the bromine

Question 14

Grignard reaction: how will the IR spectrum of alcohol product differ from the ketone reactant?

Answer 14

Alcohol product will have peak at 3300

Ketone reactant peak at 1710 will disappear

Question 15

Grignard reaction: the glassware and reagents must be water free. With what substance will water react resulting in a unwanted side reaction?

Answer 15

Alkane

Question 16

Grignard reaction: what substance is extracted into the ether layer?

Answer 16

Organic layer/ alcohol product

Question 17

Azo dye: the diazonium salt in aqueous medium is kept cold and used right away. What unwanted side reaction takes place with water?

Answer 17

Reacts with water and creates a phenol

Question 18

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?

Answer 18

Charges make product more water soluble

Question 19

Why is a solvent containing a solid product often cooled before filtering the solid product?

Answer 19

Less solid will dissolve

Maximizes yield

Question 20

After filtering on a Büchner funnel, why is the solid washed with a cold solvent?

Answer 20

Get rid of impurities

Question 21

t-Butyl chloride: Why was 5% aqueous sodium carbonate added to the organic layer?

Answer 21

Neutralizes the acid