Term for technques for separating, analyzinng, & identifying compounds
iron atom sandwiched b/w 2 cyclopentadienyl atoms
ferrocene reacts w/ ___ to form acetylferrocene
acetic anhydride & phosphoric acid
Gas or liquid phase
solid support that contains an absorbent
areas of concentration of compoenents of sample mixture
If a component has a greater affinity for the ___ phase, it will travel more slowly. If greater affinity for the ___ phase, it will travel more quickly through the ____ phase more quickly.
why is silica gel a good stationary phase?
inorganic solid which has many sites for hydrogen bonding, therefore, polar copounds tend to stick to the stationary phase (polar doesn't travel as far)
solvent that is used for the mobile phase
___ compounds interact more strongly with the stationary phase, so they travel a ___ distance up the plate. ___ compounds travel faster through the stationary phase, so they travel a ___ distance up the plate. Which has Rf value closer to 1?
Nonpolar have Rf values closer to 1
During column chromatography, do polar or nonpolar compounds elute first?
Why is important not to dilute the initial samplel before it's been loaded onto the chromatography column?
So that the entire sample enters the column in as compact a band as possible
Chalcone experiment demonstrates what type of synthesis rxn?
Aldol condensation then dehydration to form conjugated, alpha,beta-unsaturated ketone
What was ammonium formate used for in chalcone experiment?
As a source of hydrogen during transfer hydrogenation. When it decomposes in presence of Pd/C, it releases H2 which is used for reduction.
Qualitative analysis is useful b/c?
Utilizes diff reactivities of various functional groups w/reagents that give color chg, precipitate, etc
Besides qualititative test, what else is used to identy the original unknown?