[Co(diNOsar)]3+: Looking for Chemical Equivalent Protons

Viewing tools:

The most important tools:

Your mission:
Test nuclei for chemical equivalence:
Begin by
I) C-H Protons in the ethylene bridge (there are of them)
  1. Highlight Are these protons chemically equivalent: Yes or No?
  2. Highlight Are these protons chemically equivalent: Yes or No?
  3. Highlight Are these protons chemically equivalent: Yes or No?
  4. Highlight Are these protons chemically equivalent: Yes or No?
  5. Highlight Are these protons chemically equivalent: Yes or No?
  6. Highlight Are these protons chemically equivalent: Yes or No?
  7. Highlight Are these protons chemically equivalent: Yes or No?
  8. Highlight Are these protons chemically equivalent: Yes or No?
  9. Highlight Are these protons chemically equivalent: Yes or No?
  10. Highlight all of C-H ethylene bridge protons.) Are all 12 chemically equivalent: Yes or No?

II) C-H Protons in the cap (there are of them)
  1. Highlight Are these protons chemically equivalent: Yes or No?
  2. Highlight Are these protons chemically equivalent: Yes or No?
  3. Highlight Are these protons chemically equivalent: Yes or No?
  4. Highlight Are these protons chemically equivalent: Yes or No?
  5. Highlight Are these protons chemically equivalent: Yes or No?
  6. Highlight Are these protons chemically equivalent: Yes or No?
  7. Highlight Are these protons chemically equivalent: Yes or No?
  8. Highlight Are these protons chemically equivalent: Yes or No?
  9. Highlight Are these protons chemically equivalent: Yes or No?
  10. Highlight all of the C-H cap protons). Are all 12 chemically equivalent: Yes or No?

III) N-H Protons (there are of them):
  1. Highlight Are these protons chemically equivalent: Yes or No?
  2. Highlight Are these protons chemically equivalent: Yes or No?
  3. Highlight Are these protons chemically equivalent: Yes or No?
  4. Highlight all Are the 6 N-H protons chemically equivalent: Yes or No?

When you answered Yes or No to each question and have determined how many groups of chemically equivalent protons
you should see in your proton NMR spectrum. Check your answers with your instructor before proceeding
Reference: CCDC Structure HARBAD; R.J. Geve, L.M. Englehardt, J. M. Harrowfield
A.M. Sargenson, A. H. White Aust. J. Chem. Vol 46, 1993, p. 1485

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