December 23, 2024, 07:10:52 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Please help ! {UV absorbtion}  (Read 3006 times)

0 Members and 1 Guest are viewing this topic.

Offline Markleahy

  • Regular Member
  • ***
  • Posts: 9
  • Mole Snacks: +0/-1
Please help ! {UV absorbtion}
« on: January 27, 2013, 12:49:41 AM »
The compound below expected to have an absoption at the longest wavelength in its ultraviolet-visible spectrum is

a) 1,3-cyclohexadiene

b) benzene

c) 1,3,5-hexatriene

d) 1,3,5,7-octatetraene

*MOD Edit -- add descriptive title*
« Last Edit: January 27, 2013, 09:17:25 AM by Arkcon »
Logged

Offline Markleahy

  • Regular Member
  • ***
  • Posts: 9
  • Mole Snacks: +0/-1
Re: Please help !
« Reply #1 on: January 27, 2013, 01:52:30 AM »
I think it's D . because it has 4 double bonds but I'm not sure .
Logged

Offline discodermolide

  • Chemist
  • Sr. Member
  • *
  • Posts: 5038
  • Mole Snacks: +405/-70
  • Gender: Male
    • My research history
Re: Please help !
« Reply #2 on: January 27, 2013, 01:58:07 AM »
Ys, it's d and it is called a bathochromic shift see http://goldbook.iupac.org/B00618.html
Logged
Development Chemists do it on Scale, Research Chemists just do it!
My Research History

Offline Markleahy

  • Regular Member
  • ***
  • Posts: 9
  • Mole Snacks: +0/-1
Re: Please help ! {UV absorbtion}
« Reply #3 on: January 27, 2013, 11:10:23 AM »
discodermolide Thank you for the link . It was helpful :)
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links