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Topic: Functional Grp #3: Ethers. Do Now Name the following…. 1,1-ethanediol. methanol. 1-propanol. Ethers. General formula R  O  R  where R  may or may not be same as R R and R  are hydrocarbon branches O is oxygen bridge Ethers are not linear they are bent, like water.

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topic functional grp 3 ethers

Topic: Functional Grp #3: Ethers

Do Now

Name the following…

1,1-ethanediol

methanol

1-propanol

ethers
Ethers
  • General formula ROR
    • where R may or may not be same as R
  • R and R are hydrocarbon branches
  • O is oxygen bridge
  • Ethers are not linear
    • they are bent, like water
properties of ethers
Properties of Ethers
  • Pure ether: no hydrogen bonding
    • weak dipole-dipole interactions
    • Relatively low BP compared to similar alcohols
    • But higher BP than similar alkanes
  • Ethyl ether once used as anesthesia
naming ethers
Naming Ethers
  • If both hydrocarbon branches are identical:
    • name the branch (once) & add the word ether
  • If 2 branches are different:
    • list them in alphabetical order followed by the word ether
slide5

Methyl Ether

Propyl Ether

Methylpropyl Ether

H H

HCOCH

H H

H H H H H H

HCCCOCCCH

H H H H H H

H H H H

HCOCCCH

H H H H