Orgo Lab Final Quiz

Chlorophyll b is more polar than chlorophyll a because chlorophyll a has a methyl group in the same position that chlorophyll b has an aldehyde

Xanthophyll would be more polar than B-carotene because there is an alcohol on one of the phenol groups of xanthophyll

I would consider ethyl acetate a polar solvent b/c the two oxygens pull the compound in different directions

The ink from pen is polar so it will run up the TLC plate along with the TLC solvent

If one dilutes the initial sample prior to it being loaded onto the chromatography column, it would become a wide band in the column. You wouldn't be able to separate the compounds.

(distance from origin to center of spot)/(distance from origin to solvent front)

closer

Unreacted ferrocene would elute first from the column because it is the least polar of the group

the repeating units of polymers

some molecule that is binded together repeatedly until a polymer is formed

reaction where molecules join together to form polymers

a polymer formed from the linkage of two polymers

sebacoyl chloride -> hexamethylenediamine -> Nylon 10,6

Vinyl alcohol almost always exists as the tautomer

Sodium carbonate deprotonates napthol resulting in an alkoxide ion

Glacial acetic acid catalyzes the aniline, but not completely

Dacron (polyester)

Orlon

50:50 ratio of hexane and ethyl acetate; It allowed there to be both a strong stationary phase and a strong moving phase

Beta-carotene because it went the highest on the TLC plate

chlorophyll B since it was the closest to the origin point

Chlorophyll b is more polar than chlorophyll a because chlorophyll b has an aldehyde in the same position that chlorophyll a has a methyl group

KMnO4 is a strong oxidizing agent and would oxidize the product past p-aminobenzoic acid

the nitro group would also undergo esterification therefore resulting in a mixture of the products

the temperature at which the solid phase is in equilibrium with the liquid phase

a synthetic compound that acts as an analgesic and an antipyretic

Pain reliever

fever reducer

4-ethoxyacetanilide

Williamson ether synthesis of p-acetamidophenol and Amide synthesis with p-phenetidine

An impure sample is dissolved in a minimum amount of solvent at the boiling point. Any insoluble impurities are typically removed by hot gravity filtration. The hot, saturated solution is then allowed to cool slowly to room temperature

Small, pure seed crystals of the desired compound are formed in the solution. These seed crystals serve as nucleation sites where more molecules of the desired compound deposit themselves in layers

there is a small amount of impurities caused by air oxidation of the amino functional group in the compound

to remove the colored impurities from the p-phenetidine sample

(actual yield/theoretical yield) x 100

water

moles of limiting reagent X molecular weight of product

a technique that chemists use to remove selected components from a mixture, usually based on solubility differences or chemical reactivity

liquid CO2

not soluble in each other

In extractions, you are pulling the compound from one thing to another. When washing, you are simply trying to get rid of impurities.

Draw it bitch (pg. 63)

The intermediate formed in the EAS reaction is a charged species that is stabilized by resonance

Sodium iodide is the source of iodine and bleach is the oxidizer

Reaction went from orange-yellow to pale green

when the mixture is placed in a gas or liquid phase

a solid support that contains the absorbent

bands

the solvent that is used for the mobile phase

a chain addition usually involves a vinyl-type monomer

There are still unreacted reagents present in the reaction mixture and you need to continue heating

The oxidation of the methyl group is finished and the reaction is complete

colorless or light pink

Protection, deprotection, esterification