January 14, 2025, 11:20:39 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Semi-structural formulae confusion  (Read 2026 times)

0 Members and 2 Guests are viewing this topic.

Offline johnsy123

  • Regular Member
  • ***
  • Posts: 17
  • Mole Snacks: +0/-0
Semi-structural formulae confusion
« on: June 12, 2011, 03:39:08 AM »
Hey everyone. I was wondering why the semi structural formulae of 2 methly pentan-1-ol is CH3CH2CH2CH(CH3)CH2OH and not CH3CH(CH3)CH2CH2OH.

-How do you know which end to start from when your counting the carbons in these problems?
Logged

Offline Hunter2

  • Sr. Member
  • *****
  • Posts: 2330
  • Mole Snacks: +191/-51
  • Gender: Male
  • Vena Lausa moris pax drux bis totis
Re: Semi-structural formulae confusion
« Reply #1 on: June 12, 2011, 05:33:19 AM »
You have to find the longest chain, then the number 1 is the C-atom which carries the hetero atom, here the OH- group. The other law is if no hetero atoms in the molecule to have the numbers to small as possible.
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links