Purchase Solution

NMR Splitting and Radical Mechanism

Not what you're looking for?

Ask Custom Question

1. Knowing that Jac > Jab > Jbc how many lines (peaks) would be observed for Ha?

2. Write the free radical mechanism for the following decomposition and give the formula for the two radical involved in the propagation steps of the following free radical reaction.

Attachments
Purchase this Solution

Solution Summary

The solution clearly explains the rationale behind identifying NMR splitting and radical mechanism in question.

Solution Preview

1.
Characteristic complex coupling can occur in alkenes. Because of the restricted rotation about C=C bonds, the alkenyl (vinylic) H atoms of unsymmetrical alkenes are not equivalent (i.e. they are in unique chemical environments). As a result, they all couple with each other. In alkenes, trans coupling generally results in larger coupling constants (Jtrans = ...

Solution provided by:
Education
  • BSc (Hons),
  • MSc,
  • PhD,
Recent Feedback
  • "Thankyou for the feedback. I have a few question though; With the first statistic about cost below... “According to Sigma-Aldrich catalog, cost of 1L octane is AUD $ 392.00, whereas the cost of 1L ethanol is AUD $196.00. Moreover, if ethanol is obtained from sugar industry as a by-product, it may cost even less. Source of oxygen is ambient atmosphere, so it costs nothing. So ethanol is much cheaper than petrol, in fact it is half-priced: AUD $ (392-196) = $ 196.” I didn't think it made sense because the cost of petrol per litre is normally a dollar something or even less than a dollar not a couple of hundred of dollars. For example, a statistic that I found in america was: "U.S. ethanol production costs are about $1.20 per gallon of ethanol, or $1.82 per gallon on a gasoline-equivalent basis." However, I was wondering whether you could find an Australian statistic. Also, you mentioned that H20 is not a greenhouse gas. However, in the combustion equations it is actually carbon dioxide and water vapour which are produced and they are both greenhouse gases. Finally, how do I calculate the energy efficiency of ethanol and petrol? "
  • "Thank you!"
  • "Didnt really answer my questions but gave me a start at least."
  • "Once again this is tremendous help I can't thank you enough for not only working the problem but explaining in detail how and why!! KR"
  • "Awesome thank you so much for the help!!!"
Purchase this Solution


Free BrainMass Quizzes
Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

General Chemistry - Classification of Matter

This test will assess your knowledge on the classification of matter which includes elements, compounds and mixtures.

Thermochemistry

The quiz helps in revising basic concepts about thermochemistry.