heating while letting the product/solvent condense back into the reaction mixture so that the liquid product or solvent does not evaporate
what is the reagent forms the diazonium salt from the amine?
diazonium salts are formed by nitrous acid, HONO,
What form is the reagent added to form diazonium salt?
added as sodium nitrite in acid.
how can you tell that the reaction of the formation of diazonium salt is complete?
when the diazonium formation is complete, the nitrite that is left over will immediately react with the starch-iodide paper.
how do you remove excess reagent from the reaction that formed diazonium salt?
At that point, urea can be added to destroy the excess HONO.
what is the use of K2CO3?
What is the purpose of using of sat. NaCl?
helps remove water from non aqueous phases during washing
what is the purpose of using tetramethylsilane?
what is the purpose of using CDCl3?
NMR solvent, which has no H that would give its own signal
what products were synthesized by recrystillization?
no products were synthesized by recrystallization because it is a physical means of separation.
products in experiment 1, m-nitromethylbenzoate and aldol reactions were purified by recrystallization after they were synthesized
what is the principle behind chromatography?
that sample is moved in a mobile phase past a stationary phase. the compound dissolved in the mobile phase interact to different extents with the stationary phase so that they take different times to pass through the phase
- the mobile phase is the solvent and the stationary phase is the silica gl stuck to the plate. the components are detected and compared to a standard, or by Rf value
sample is vaporized to pass with the mobile gas phase (helium) past the liquid stationary coating inside the tubing. as compounds interact with the stationary phase they take varying amounts of time to pass trough the column to the detector. these times are compared to a standard.
works similarly to thin-layer chromatography except there is paper as the stationary phase
what is some of the information on a material safety data sheet ( MSDS) ?