Pinacol Flashcards
General procedure: weight out … and add 30 mL … … until 21.5 mL is collected in … draw off … put ketone (organic layer) in E. Fk with …; transfer to a 25 mL Rb Fk and store set up for a … record weight, RI, and IR
2,3-dimethyl-2,3-butanediol; H2SO4; steam distill; separatory funnel; aqueous phase; Na2SO4; semimicro distillation
Boiling chips are … and …; makes the boiling …; evenly distributes …; makes boiling more …
porous; anti-bumping; even; temperature; gentle
H2SO4 acts as … and catalyzes the reaction by … to make it a good … such that the C+ that undergoes rearrangement is formed
solvent; protonating the OH; leaving group
The H2SO4 is neutralized using … (…) according to the following equation
Na2CO3; sodium carbonate;
Na2CO3 + H2SO4 –> Na2SO4 + H2CO3 –> Na2SO4 + H2O + CO2
semimicro distillation is intended for further … in case there’s any … left. It’s used on small quantities bc otherwise the distillate could get …
purification; pinacol; stuck in the condenser
the receiving flask is placed on an ice bath to prevent
evaporation of the keton
name of product:
3,3-dimethyl-2-butanone
1 mL of H2O is left in separatory funnel to help … coming as distillate
accumulate any H2O
the thermometer bulb was placed below the sidearm of the distillation apparatus, at the junction between the … and the … This is so that the thermometer would read the temperature of the vapor being condensed that contains the product, to give a more accurate reading. If it were lower, the temp. would show … than the true value; if it were higher, the temp would be … than the true value
stillhead; vacuum adapter; higher; lower
(toxicity) pinacol: acute toxicity, … and … irritation, skin …
skin; eye; sensitization
3,3-dimethyl-2-butanone: acute toxicity, … and … irritation, skin …
skin; eye; sensitization
H2SO4: …, serious …
skin corrosion; eye damage
