Experiment 2: Catalytic Alkene Hydrogenation

0.0(0)
studied byStudied by 1 person
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
Card Sorting

1/13

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced

No study sessions yet.

14 Terms

1
New cards

hydrogenation

addition of a molecule of H2 across a unit of unsaturation

2
New cards
<p>Is this molecule Saturated or unsaturated </p>

Is this molecule Saturated or unsaturated

unsaturated

3
New cards
<p>Is this molecule saturated or unsaturated </p>

Is this molecule saturated or unsaturated

Saturated

4
New cards
<p>How many units of unsaturation does this have?</p><ul><li><p>0</p></li><li><p>1</p></li><li><p>2</p></li><li><p>3</p></li><li><p>4</p></li><li><p>5</p><p></p></li></ul>

How many units of unsaturation does this have?

  • 0

  • 1

  • 2

  • 3

  • 4

  • 5

4

5
New cards

Which of the following statements about unsaturated fats is incorrect?

  • Unsaturated fats are believed to be healthy

  • Unsaturated fats can contain trans alkenes

  • Unsaturated fats are made up of a molecule of glycerol and 3 fatty acids

  • Unsaturated fats can react with oxygen at the allylic positions and become rancid


unsaturated fats are stable

6
New cards

What exactly is studied in this experiment?

  • selective hydrogenation of ethyl cinnamate through palladium catalysis

7
New cards

What is a reduction reaction? What is being reduced in this case?

  1. carbons form new bonds to hydrogens

  2. the alkene of ethyl cinnamate

8
New cards

what is the role of Pd/C ( palladium on carbon) the experiment?

it is a hydrogenation catalyst

9
New cards

What is a reflux condenser?

  • The key component to a reflux apparatus

  • it has a hollow inner layer where cold water passes through to cool the inner surface

  • acts to cool and condense liquid so solvent doesn’t boil away

<ul><li><p>The key component to a reflux apparatus</p></li><li><p>it has a hollow inner layer where cold water passes through to cool the inner surface </p></li><li><p>acts to cool and condense liquid so solvent doesn’t boil away </p></li></ul>
10
New cards

When should experimentalists consider using a reflux apparatus?

  • any time a heating plate is used

  • when the reaction mixture is heated near or over the boiling point of at least one component

  • it is always optional because it does not affect the outcome of the experiment

  • only when ethanol is used as the solvent

  • when the lab temperature is hot

  • when the reaction mixture is heated near or over the boiling point of at least one component

11
New cards

what is a chromophore?

the part of a molecule that is responsible for absorbing light

12
New cards

when would you use a TLC stain?

When a molecule that does not have a chromophore is being analyzed

13
New cards

How does a potassium permanganate ( KMnO4 ) stain work?

  • it is an oxidant

  • oxidizes molecules with oxidizable functional groups

    • alkenes, alcohols, amines, aldehydes, alkynes

14
New cards