Question: Compound D is isomeric with compound C (Problem 13.61) and has the following 13C NMR spectral data. Propose a structure. Compound D Broadband-decoupled 13C NMR:

Compound D is isomeric with compound C (Problem 13.61) and has the following 13C NMR spectral data. Propose a structure.

Compound D

Broadband-decoupled 13C NMR: 9.7, 29.9, 74.4, 114.4, 141.4δ

DEPT-90: 74.4, 141.4 δ

DEPT-135: positive peaks at 9.7, 74.4, 141.4 δ; negative peaks at 29.9, 114.4 δ

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