Determine the most likely structure of a compound,with the molecular formula C₉H₁₂,which gave a ¹H NMR spectrum consisting of: a doublet at $\delta$1.25 A septet at $\delta$2.90 and A multiplet at $\delta$7.25 ]

Question

Quizplus · Accepted Answer

The doublet at 1.25 ppm corresponds to the proton that is directly attached to a methyl group (-CH3). The septet at 2.90 ppm corresponds to the diastereotopic protons on the two adjacent carbons (each having three neighboring protons). The multiplet at 7.25 ppm corresponds to the aromatic protons. The molecular formula suggests that there are two carbon disulfide (CS2) groups present, which can be assigned to the two aromatic rings in structure D. Therefore, structure D is the best choice.

Determine the Most Likely Structure of a Compound,with the Molecular δ\deltaδ

Determine the Most Likely Structure of a Compound,with the Molecular $\delta$