Assign NMR peaks to the following Structure. And desribe the
Spectra as you would for a formal report. Please help at least give
some advice on how to start this, although full answer would
receive more points! http://imgur.com/ozaSOML
What proton nmr signals (at high field giving little overlap of
signals) would be given by the vinyl hydrogens and the aromatic
ring hydrogens of dibenzalacetone? You must indetify the sets of
chemically equivalent protons, how many protons are in each set,
what center of the signal of each set is expected to be in ppm, and
what the multiplicity of each signal is expected to be. Do this
with words and a structure, not with a drawn spectrum.
Compare and contrast the following pairs of rocks and explain
what is the same and different, and why.
(a) Granite and Rhyolite
(b) Rhyolite and Basalt
(c) Granite and granitic gneiss
(d) Limestone and marble
1. How many peaks would you expect to see in the Fluorine (19F)
NMR of PF5 at room temperature and how many at 110 K? Support your
answer.
2. The reaction of sodium carbonate, boron oxide, and silicon
dioxide gives a borosilicate glass. Explain why the powder
diffraction pattern of this product shows no diffraction
maxima.
For
an NMR(Nuclear Magnetic Resonance) Spectroscopy (proton NMR),
1.What is meant by chemically equivalent protons?
2.What is meant by chemical shift proton?
3.How can you tell whether two protons are chemically
equivalent?
Also,
4. Difference between enantiotopic, diastereotopic, and
homotopic protons?
Compare position of molecular ion peaks for (bromobenzene and
4-bromotoluene) how are they different/similar? Also, compare the
fragments that formed (how are they different and similar?)
Explain the proper techniques for cleaning the NMR tubes.
Explain NMR and IR spectroscopy and what can be gained from both
individually to analyze an unknown sample. Explain and show
work.