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Organic Chemistry 2 Reagents Exam Questions With Guaranteed Passing Answers
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Hydrogenation: H2,Ni high pressure/ H2,Pd - ANSWER-Reducing agent... Reduces Alkynes and Alkenes - Alkanes Aldehydes- primary alcohols Ketones- secondary alcohols Esters- two alcohols Imine- amine Amide- amine Nitrile- primary amine Nitro- amine 10% NaOH - ANSWER-Aldol Condensation 1.O...

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  • October 17, 2024
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  • 2024/2025
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  • organic chemistry 2 reagents exam questions with g
  • organic chemistry 2 reagents exam stuvia
  • hydrogenation h2ni high pressure h2pd answer

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Organic Chemistry 2 Reagents Exam
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Answers

Hydrogenation: H2,Ni high pressure/ H2,Pd - ANSWER-Reducing agent... Reduces
Alkynes and Alkenes - Alkanes

Aldehydes- primary alcohols

Ketones- secondary alcohols

Esters- two alcohols

Imine- amine

Amide- amine

Nitrile- primary amine

Nitro- amine



10% NaOH - ANSWER-Aldol Condensation



1.O3

2.Zn or Me2S

Or

1.03

2.H2O2 - ANSWER-1.Ozonolysis (oxidation of an alkene)

2.Hydrogen peroxide does further oxidation. Product = carboxylic acid



Carboxylic acid + 1. Alcohol 2. H3O+ (Work-up step) - ANSWER-Fischer esterification.

Carboxylic acid turns into an ester.



Alcohol + PCC - ANSWER-Primary alcohol + PCC = Aldehyde

Secondary alcohol + PCC = Ketone

, "Please stop oxidation at aldehyde & ketone"



Aldehyde or ketone + ethylene glycol and acid - ANSWER-Cyclic acetal

This serves as a protecting group for aldehydes or ketones. You can then react another
part of the molecule without touching the aldehyde or ketone part.

You deprotect the cyclic acetal and get your ketone or aldehyde back by acid and water.



R-MgBr - ANSWER-Grignards reagent

The purpose is to add carbons to a molecule.



Grignard workup - ANSWER-



Nitrile + 1. R-MgBr 2. H3O+ - ANSWER-Ketone



H3O+ (Acidic work-up step) - ANSWER-Purposes: a)acidic work-up step

b) acidic hydrolysis

c) Cleaves =N+ to =O



LAH (Lithium Aluminum Hydride) - ANSWER-STRONG REDUCING AGENT

Carboxylic acid - primary alcohol

All Carboxylic acid derivatives- primary alcohol

Aldehyde- primary alcohol(use NaBH4 rather)

ketone- secondary alcohol(use NaBH4 rather)

"Lets reduce everything"



CrO3 or H2CrO4 - ANSWER-Oxidizing agent

"Crap lets oxidize everything"



Ph3P=CH2 - ANSWER-WITTIG REAGENT

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