November 27, 2024, 04:55:41 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Strucutre Proposal  (Read 4098 times)

0 Members and 2 Guests are viewing this topic.

Offline demo2301

  • Very New Member
  • *
  • Posts: 1
  • Mole Snacks: +0/-0
Strucutre Proposal
« on: April 14, 2015, 07:39:10 PM »
I am having trouble with this and need help. Given the IR, NMR, and mass spec, what would you propose is the structure? All are attached.
Logged

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27862
  • Mole Snacks: +1813/-412
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Strucutre Proposal
« Reply #1 on: April 15, 2015, 03:00:16 AM »
Please read the forum rules. You have to show your attempts at solving the question to receive help. This is a forum policy.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Offline mjc123

  • Chemist
  • Sr. Member
  • *
  • Posts: 2071
  • Mole Snacks: +302/-12
Re: Strucutre Proposal
« Reply #2 on: April 15, 2015, 04:35:28 AM »
Haven't you got any IR bands below 1000 cm-1? They can be useful.
Logged

Offline tomek

  • Regular Member
  • ***
  • Posts: 52
  • Mole Snacks: +9/-1
Re: Strucutre Proposal
« Reply #3 on: April 16, 2015, 03:08:35 AM »
The compound you're looking for is rather simple. You should consider monosubstituted benzene ring, a halogen atom and perhaps some short chain. Do you have CNMR to give you more clues?
Logged

Offline Dan

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 4716
  • Mole Snacks: +469/-72
  • Gender: Male
  • Organic Chemist
    • My research
Re: Strucutre Proposal
« Reply #4 on: April 16, 2015, 06:02:54 AM »
Start with the MS. What is the nominal mass? Any characteristic isotope patterns? Any characteristic fragments?
Logged
My research: Google Scholar and Researchgate

Offline pgk

  • Chemist
  • Full Member
  • *
  • Posts: 892
  • Mole Snacks: +97/-24
Re: Strucutre Proposal
« Reply #5 on: April 27, 2015, 05:15:44 PM »
MS spectrum: M+2 peak at intensity ratio about M/M+2 = 1/3 like this one, is a safe criterion of a chorine atom in the molecule.
The reason is that chorine has two principal stable isotopes: 35Cl and 37Cl in relative proportions of about 38/12 w/w.
« Last Edit: April 27, 2015, 06:44:03 PM by pgk »
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links