Chm 2211l - Study guides, Class notes & Summaries

Mixtures have (higher/lower) melting points than pure substanceslower What is the purpose of sodium acetate solution in the amide synthesis of acetophenetidin?In the acylation reaction, the amine acts as a nucleophile, but we have the ammonium salt present in our solution. This ammonium salt can't act as a nucleophile (it doesn't have non-bonded electrons to use), so we need to add something to deprotonate the ammonium salt. This is the purpose of the sodium acetate - it is just a wea...

Why did we use decolorizing carbon?To remove impurities from oxidation Which functional group was oxidized in the acetophenitidin?the amine Why do we need to take impurities out of reactions?because impurities will lower the yield why do we add acetic anhydryde?to make it more neutral again so that it can react What is the proper way to make an icebath?1/4 water and 3/4 ice to increase the surface area We added sodium methoxide (a strong base)...what would happen if we skipped this st...

What is a technique used to purify organic solids?recrystallization When an organic chemist conducts a recrystallization, he chooses a solvent that will what?completely dissolve both the desired compound and any other organic impurities when that solvent is at BP In addition to solubility at boiling temperature requirement of the solvent in recrystallization, the desired compound must also be what?insoluble in the chosen solvent at cold temperatures, and the organic impurities must rem...

Which of the following is a monomer? a. benzene dimethanol b. cellulose c. glucose d. polyvinyl alcoholbenzene dimethanol cannot be a polymer answer: glucose The final polymers you synthesized followed which pattern? a. AB b. ABC c. ABA d. ABB e. AAABA

CHM 2211L ORGANIC CHEMISTRY LAB / CHM 2211L MIDTERM REVIEW

Mixtures have (higher/lower) melting points than pure substanceslower What is the purpose of sodium acetate solution in the amide synthesis of acetophenetidin?In the acylation reaction, the amine acts as a nucleophile, but we have the ammonium salt present in our solution. This ammonium salt can't act as a nucleophile (it doesn't have non-bonded electrons to use), so we need to add something to deprotonate the ammonium salt. This is the purpose of the sodium acetate - it is just a wea...

Why did we use decolorizing carbon?To remove impurities from oxidation Which functional group was oxidized in the acetophenitidin?the amine Why do we need to take impurities out of reactions?because impurities will lower the yield why do we add acetic anhydryde?to make it more neutral again so that it can react What is the proper way to make an icebath?1/4 water and 3/4 ice to increase the surface area We added sodium methoxide (a strong base)...what would happen if we skipped this st...

What is a technique used to purify organic solids?recrystallization When an organic chemist conducts a recrystallization, he chooses a solvent that will what?completely dissolve both the desired compound and any other organic impurities when that solvent is at BP In addition to solubility at boiling temperature requirement of the solvent in recrystallization, the desired compound must also be what?insoluble in the chosen solvent at cold temperatures, and the organic impurities must rem...

Which of the following is a monomer? a. benzene dimethanol b. cellulose c. glucose d. polyvinyl alcoholbenzene dimethanol cannot be a polymer answer: glucose The final polymers you synthesized followed which pattern? a. AB b. ABC c. ABA d. ABB e. AAABA

CHM 2211L / CHM 2211L MIDTERM REVIEW|CHM 2211L / CHM 2211L MIDTERM REVIEW