Carbonyl Reduction Flashcards
(22 cards)
What are the reactants
The reactants are benzoohenone + NaBH4 + CH3OH
What is the theoretical product
Diphenylmethanol
Benzophenone precaution?
Environmentally damaging
Diphenylmethanol precaution?
Skin irritation
Sodium borohydride precaution?
Flammable
Is this reaction endothermic or exothermic ?
It’s exothermic
At what temperature do you want to maintain the reaction mixture and why
Do you want to maintain the reaction mixture below 45°C this will minimize the side reaction of sodium borohydride with the solvent methanol
What solvent will you be using to wash your crude product
I will be using water as my solvent
What are the sources of hydrogen’s that are introduced to form the final product diphenyl methanol
The sources of hydrogens RNABH4 and 0H from CH30H. One hydrogen comes from each one to form the final product diphenyl methanol
What types of carbonyl compounds can be used to prepare primary and secondary alcohols
Carboxylic acid can be used to prepare primary alcohols. While ketones can be used to prepare secondary alcohols
Can a tertiary alcohol be prepared by the reduction of a carbonyl compound
A tertiary alcohol cannot be prepared by the reduction of a carbonyl compound
Define oxidation and reduction
Oxidation is the increasing number of CO bonds and or decreasing the number of CH bonds while reduction is the decreasing number of CO bonds and or increasing the number of CH bonds
Do you think the synthesize diphenylmethanol compound was pure ?
Yes I think the synthesize diphenyl methanol compound was pure because it had a small melting range
What is a positive test for jones ?
A positive test is the formation of a blue green
What is a positive test for Lucas test?
A positive test is the appearance of an emulsion
What were the results of 1-butanol for Joannes and Lucas tests?
Or Joannes test the results were Orange to blue green. For the Lucas test the results were no reaction
What were the results for 2-butanol for Jones and Lucas tests
Or Jones the results were Orange to blue green. For Lucas the results were emulsion one minute
What were the results for 2-methyl 2- propanol ?
There was no reaction for the Jones test and for Lucas it was Emulsion 5 minute
What were the results for isopropyl alcohol
The results were orange to blue green no reaction for Lucas
What were the results for ethanol
For Joannes it was orange to blue green and for Lucas it was no reaction
What were the results for your diphenylmethanol product?
For Joannes it was orange to blue green and for Lucas it was emulsin five minutes
Sodium borohydride reacts with
H2O to form H2 has
