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Logic Puzzle #40: What Fragment is This?

An experienced elucidator can recognize spectral patterns and use this information to piece together a fragment. This puzzle examines one such pattern-to-fragment connection.

A 1H NMR spectrum below shows the aromatic region for an unknown compound? Can you identify the fragment that would produce this pattern?

2 Replies to “Logic Puzzle #40: What Fragment is This?”

  1. It suggest me something like a coumarin, but J of peak at 6.95 ppm is too for that. Maybe a 3-substituted-quinoline which would gives two meta-coupled proton (one must be hidden under the doublet at 7.58)


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