Propose a Structure That Fits the Following Spectroscopic Data:
C₄H₈O $\delta$

question 36

Essay

Propose a structure that fits the following spectroscopic data:
C₄H₈O
IR: 1728 cm⁻¹
Broadband decoupled ¹³C NMR: 13.71,15.69,45.82,202.80 $\delta$
DEPT experiments show: signal at 13.71 $\delta$ as CH₃ and signals at 15.69,45.82 $\delta$ as CH₂

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Definitions:

Variable Overhead Rate Variance

The difference between the actual variable overhead costs incurred and the expected costs based on standard rates and actual production levels.

Direct Labor-hours

The grand total of working hours by employees who directly contribute to the manufacturing pipeline.

Variable Overhead

Costs that fluctuate with production volume, such as utility expenses or materials costs, which increase or decrease as production levels change.

Variable Overhead Rate Variance

The difference between the actual variable overhead incurred and the expected (or standard) variable overhead based on the predetermined rate.