Chemical Forums

Please login or register.

Login with username, password and session length

Sponsored links

Pages: [1]   Go Down

Author Topic: Questions on ethers  (Read 1149 times)

0 Members and 1 Guest are viewing this topic.

Daiana

  • New Member
  • **
  • Mole Snacks: +0/-0
  • Offline Offline
  • Posts: 8
Questions on ethers
« on: January 13, 2018, 06:34:02 AM »

The questions are attached

Ignore the word: in e-mail
Logged

Daiana

  • New Member
  • **
  • Mole Snacks: +0/-0
  • Offline Offline
  • Posts: 8
Questions on ethers 2
« Reply #1 on: January 13, 2018, 06:35:47 AM »

The questions are attached
Logged

Enthalpy

  • Chemist
  • Sr. Member
  • *
  • Mole Snacks: +224/-51
  • Offline Offline
  • Posts: 2656
Re: Questions on ethers
« Reply #2 on: January 14, 2018, 02:23:11 PM »

For (2) it's rather methyl-tert-butyl.

(6) is impossible. A cycle has two hydrogen atoms less than a straight or branched alkane, so it's not an isomer.

The names of dibromo look fine to me.
Logged

Daiana

  • New Member
  • **
  • Mole Snacks: +0/-0
  • Offline Offline
  • Posts: 8
Re: Questions on ethers
« Reply #3 on: January 16, 2018, 08:50:37 AM »

Thank you a lot! I don't know how to thank you )))
How about 14.44 and that question about 2 squares.
Logged

Daiana

  • New Member
  • **
  • Mole Snacks: +0/-0
  • Offline Offline
  • Posts: 8
Re: Questions on ethers
« Reply #4 on: January 16, 2018, 08:55:13 AM »

(6) you said that 6 is impossible. However, with CH3 it has the same number of hydrogens like the chains above. I mean that if we took the complete formula - we would get 12 hydrogens.
Logged

AdiDex

  • Full Member
  • ****
  • Mole Snacks: +16/-12
  • Offline Offline
  • Gender: Male
  • Posts: 301
Re: Questions on ethers
« Reply #5 on: January 16, 2018, 08:28:55 PM »

You can always use http://www.chemspider.com/FullSearch.aspx for checking IUPAC name.

all you need to do is just draw the structure.
Logged

Enthalpy

  • Chemist
  • Sr. Member
  • *
  • Mole Snacks: +224/-51
  • Offline Offline
  • Posts: 2656
Re: Questions on ethers
« Reply #6 on: January 17, 2018, 06:31:18 AM »

(6) has 2*4+1+3=12 hydrogen atoms. As opposed, a straight or ramified ether with 6 carbons has 6*2+2=14 hydrogens.

You don't need to count every hydrogen atom, which is prone to errors. It suffices to know that straight or ramified alkanes have 2*C+2 hydrogens, and that every ring or double bond takes 2*H fewer (triple bonds 4*H, lone benzene rings 8*H etc).

That is, a ring can't be an isomer of a straight alkane. It's an isomer of an alkene.

Imagine that you close a ring from a straight alkane by binding both end C. Each carries 3*H so no bond is possible. Only by removing one H on each C can you make the new C-C bond.
Logged

Babcock_Hall

  • Chemist
  • Sr. Member
  • *
  • Mole Snacks: +229/-16
  • Offline Offline
  • Posts: 3520
Re: Questions on ethers
« Reply #7 on: January 17, 2018, 11:47:20 AM »

The use of two squares for a cyclobutyl group may be a misprint of some kind.  I don't recall ever seeing that depiction before.
Logged
Pages: [1]   Go Up
 

Mitch Andre Garcia's Chemical Forums 2003-Present.

Page created in 0.059 seconds with 23 queries.