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Worksheet: COSY NMR Spectra

In this worksheet, we will practice using 2D correlation spectra to determine which protons in a compound show significant spin-spin coupling.

Q1:

In a COSY spectrum, the dark spots along the diagonal .

Ado not give any structural identification because they are too intense to be deconvoluted
Ballow distinctions to be made between heteronuclear coupling constants
Cgive the most structural information because they differentiate between different hybridizations
Ddo not yield structural information because they correspond to the same peak on each coordinate axis