C. p-Nitrobenzyl or p-Bromophenacyl Esters Cl O₂N- R Br ос R Br O₂N- R Br -R Θ Br 1.2 mmol of acid is placed in 1 mL of water in a test tube and carefully neutralized with 10% NaOH solution. Then, a tiny amount of additional acid is added to make the solution just acidic to pH paper. Then add 2 mL of 95% ethanol and 0.8 mmol of the p-nitrobenzyl chloride(PNBC)/p- bromophenacyl bromide(PBPB). Reflux the mixture for about one hour (for pNBC) or 30-40 min (for pBPB) and add small amounts of 95% ethanol if a solid separates during reflux. Allow the hot solution to cool to room temperature and the derivative to crystallize. The liquid can be removed from the crystals by using a pipette. The solid ester should be recrystallized using a minimal amount of 95% ethanol in the same reaction tube.

42 segundos) ga X KY Inglés What is the purpose that in the reactions of carboxylic acids with alcohol they have an excess of acid if there is already an acid in solution (carboxylic acid)? 1.so that the solution has an excess of hydroxyls 2.to increase pH due to carboxylic acid 3.so that the solution Onigle Tra Págin: El Trac traducc por God video er Fecha de Propietar Tambier

mark mechnism of catalysis

E OH F HO HO OH OH 1. H2SO4, toluene, heat excess dimethyl ketone 2. CrO3/HCI/Py/DCM 3. H3O+, H₂O 2R-methylhexanal 1. Ammonia 2. hydrogen cyanide 3. acidic hydrolysis under reflux