From each group of three molecules, choose the one whose structure is most consistent
Chapter 10, Problem 57(choose chapter or problem)
From each group of three molecules, choose the one whose structure is most consistent with theproton-decoupled 13C NMR data. Explain your choices. (a) CH3(CH2)4CH3, (CH3)3CCH2CH3,(CH3)2CHCH(CH3)2; d 5 19.5 and 33.9 ppm. (b) 1-Chlorobutane, 1-chloropentane, 3-chloropentane;d 5 13.2, 20.0, 34.6, and 44.6 ppm. (c) Cyclopentanone, cycloheptanone, cyclononanone; d 5 24.0,30.0, 43.5, and 214.9 ppm. (d) ClCH2CHClCH2Cl, CH3CCl2CH2Cl, CH2 5 CHCH2Cl; d 5 45.1,118.3, and 133.8 ppm. (Hint: Consult Table 10-6.)
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