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Logic Puzzle #38: Count This … Solution

January 8, 2013
by Arvin Moser, Team Manager, Application Scientists, ACD/Labs

Yes, basic counting is important in solving an unknown. How did you stack up with this puzzle?

The 13C NMR spectrum below shows 7 signals in total, 3 intense signals and 4 weak signals. The 4 weak signals follow a quartet pattern produced by a CF3 group. The unknown contains a minimum of 4 C atoms.

BONUS You get 1 extra point for indicating that the unknown also contains a minimum of 3 F atoms.

Thank you Walter, Inamul and Adolph for your comments.


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