Fully deuteriated acetone (acetone-D6) is often used as a proton-free NMR solvent. However, it usually contains a small amount of acetone-D5. (a) Predict the appearance of the 'H spectrum of acetone-D5. (b) Predict the appearance of the 13C spectrum of acetone-D6: 27 acetone-D EXAMPLE 8.13 From your knowledge of heteronu- clear coupling, predict which 3C-'H couplings should be observed in the 3C spectrum of 2-chlorobutane: HC b a acetone-D CH C d CH