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Z - Chem 2229 (Organic Chemistry II Lab) > Grinard, Part I > Flashcards

Grinard, Part I Flashcards

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1
Q

Structure of benzophenone

A

carbon connected to two benzene rings and double bonded to oxygen

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2
Q

Structure of bromobenzene

A

benzene ring connected to Br

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3
Q

Structure of triphenylmethanol

A

carbon connected to three benzene rings and single bonded to OH

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4
Q

Structure of diethyl ether

A

oxygen connected on both sides to ethane

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5
Q

Structure of iodine

A

I2

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6
Q

Structure of hydrochloric acid

A

HCl

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7
Q

Structure of anhydrous sodium sulfate

A

Na2SO4

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8
Q

Structure of magnesium metal

A

mg

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9
Q

Structure of biphenyl

A

two benzene ring connected to each other

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10
Q

Structure of petroleum ether

A

c5-c6 hydrocarbon mix

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11
Q

Structure of isopropyl alcohol

A

carbon connected to OH and two other Cs

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12
Q

Give the balanced equation for the reaction

A

Bromobenzene + Mg -> Phenylmagnesium bromide

Phenylmagnesium bromide + benzophenone -> triphenylmethanol

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13
Q

Describe the side reaction to form biphenyl

A

Phenylmagnesium bromide + bromobenzene -> biphenyl and MgBr2

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14
Q

Why does everything have to be dry?

A

to prevent the reaction of RMgX + HOH -> RH + MgXOH

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15
Q

Give some examples of how the reaction can be initiated

A

scratching/crushing mg
adding I2 crystal, 1,2-dibromoethane, or PhMgBr
use of ultrasound
heating (limited by BP of ether)

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16
Q

How can the side reaction be minimized?

A

adding bromobenzene slowly

17
Q

Give some examples of the hazards of Et2O

A

Flammable
Hard to dispense (generates pressure), vaporize in exothermic reactions
Need ice water in condenser
Forms explosive peroxides with air, absorbs moisture with air
Anesthetic in high concentrations

18
Q

How does reaction rate relate to temperature?

A

reaction rate doubles with every 10*C increase

19
Q

Name the drying agent we will use (in drying tube)

A

drierite

20
Q

How is H2 gas formed?

A

The HCl added to neutralize the reaction will react with unused Mg metal, producing the H2 gas

Z - Chem 2229 (Organic Chemistry II Lab) (8 decks)

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