Question

Refer to the structure of 3-methyl-2-butanone below to answer the following question(s).

(a) What is the splitting pattern for the hydrogens in 3-methyl-2-butanone labelled a. and labelled b.,separately? (b) Predict the chemical shifts for the hydrogens in 3-methyl-2-butanone? (c) The carbonyl-carbon resonance of 3-methyl-2-butanone occurs at 208.7 ppm downfield fromTMS. How many hertz downfield from TMS would this carbonyl-carbon absorb if the spectrometer used to measure this absorption were operating at 200 MHz?

Fig: 1

Fig: 2

Fig: 3

Fig: 4

Fig: 5