Borohydride Reduction Lab Quiz Questions Flashcards Preview

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Flashcards in Borohydride Reduction Lab Quiz Questions Deck (20)
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1

What reducing agent will we use?

NaBH4, sodium borohydride

2

What will be the reactant? (What we reduce)

9-Fluorenone

3

What will be the reduced product of 9-Fluorenone?

9-Fluorenol

4

What will we use to neutralize the reaction and isolate the alcohol product?

HCL

5

What do we use to separate out the products?

Methylene Chloride

6

What do we use to dry the products?

Anhydrous Sodium Sulfate

7

How do you calculate theoretical yield?

g/MM * mol product/molreactant *MM product

8

How do you calculate percentage yield?

Actual Yield/Theoretical Yield x 100

9

What is the structure/formula of 9-Fluorenol

A benzene ring on either side of a five carbon ring (sharing two carbons each), with a single bond OH on the top of the five carbon ring

10

What is the structure/formula of Hexane?

6 carbons

11

What is the structure/formula of Hydrogen Chloride?

HCL

12

What is the structure/formula of Silica Gel?

SiO2

13

What is the structure/formula of Methylene Chloride?

CH2Cl2

14

What is the structure/formula of Anhydrous Sodium Sulfate?

Na2SO4

15

What is the overall procedure?

Reduce ketone (monitor via TLC)
Acidify to form product & remove excess NaBH4.
Extract product with CH2Cl2.
Dry CH2Cl2 extract over Na2SO4.
Evaporate CH2Cl2.
Weigh product. Calc. % yield.
Run MP.

16

How do you calculate Rf?

d/D when d is starting line to sample spot center, and D is starting line to final solvent front

17

What are the polarity effects of TLC? (for this experiment)

The more polar the compound, the more it sticks to the plate and the lower the Rf

18

What is the structure/formula of 9-fluorenone?

A benzene ring on either side of a five carbon ring (sharing two carbons each), with a double bond O on the top of the five carbon ring

19

What is the structure/formula of acetone?

Chain of three carbons, center has =O

20

Give the balanced reaction for this experiment?

4 9-fluorenone + NaBH4 -> 4 9-fluorenol