re-crystallized in 10mL test tube with benzoic acid (1.83 mmol 0.2229 g); water bath used to heat solution to boiling; sintered glass funnel was used to suction filter; washed 1x with hexane and dried the crystals over suction (25 min)
re-crystallized in 10mL test tube with benzoic acid (2.12 mmol 0.2584 g); ethylene glycol bath used to heat solution to 100C; cooled on ice for 15 minutes; sintered glass funnel used to suction filter; washed 3x with pentane; air dried for 10 minutes; water in HNMR spectrum so pentane wash did not remove the water solvent
caffeine (1.0251g 5.3mmol) re-crystallized in Erlenmeyer flask on hot plate; cooled to room temperature; crystals did not separate from 1-octanol so none of the 1-octanol could be removed prior to pentane wash
caffeine (1.03 g 5.3mmol) re-crystallized in Erlenmeyer flask on hot plate; cooled to room temperature; filtered on Butcher funnel; washed 5x with pentane
10mL test tube with caffeine (0.25g 1.3mmol); centrifuge method was used to wash the crystals 12x with 1.5g of pentane; removed 54% of 1-octanol before washing with pentane
re-crystallized in 10mL test tube with caffeine(1.08 mmol 0.2520 g); ethylene glycol bath used to heat solution to 110C; cooled on ice for 20 minutes; sintered glass funnel used to suction filter; washed 3x with pentane; air dried for 10 minutes; verified by HNMR that no toluene was present in the product crystals
re-crystallized in 10mL test tube with cinnamic acid (1.67 mmol 0.2472 g); water bath used to heat solution to boiling; sintered glass funnel was used to suction filter; washed 1x with cyclohexane and dried over suction (35 min)
Used KOH as base catalyst (1.8M) but KOH was not fully dissolved in water before addition of the ethanol; benzaldehyde did not fully dissolve into the ethanol before addition of acetone.
Orange bubble formed on top of solution rather than crystals. Too little ethanol was used to dissolve the benzaldehyde. Used KOH (0.3M) as base catalyst.
Sodium Carbonate (white solid) formed from NaOH (catalyst) reacting with air and had to be removed. Product was recrystallized from ethanol. Used NaOH as base catalyst.
re-crystallized in a Erlenmeyer flask on hot plate; cooled to room temp; filtered on Buchner funnel; small clump of crystals that did not fully dissolve into the solution
re-crystallized in 10mL test tube with dibenzalacetone (1.11 mmol 0.2600 g); water bath used to heat solution to 75C; sintered glass funnel was used to suction filter; washed 1x with ethanol and dried over suction (40 min)
NaOH catalyst (1.57 eq to acetone); 2.87 eq benzaldehyde to acetone; 30 min rt then filtered; washed 1x with 2-3mL of 1:1 ethanol/water; dried over suction for 25 min; no re-crystallization required
NaOH catalyst (1.17 eq to acetone); 2.52 eq benzaldehyde to acetone; 40 min rt then flitered; washed 1x with 1:1 ethanol/water; dried over suction for 40 min; no re-crystallization completed but slight ethanol impurity present in HNMR spectrum
