試題詳解

79. Deduce the identity of the compound from the data provide.
C₅H₈O₄:
IR(cm^-1):2800-3300 (broad), 2950, 1740
¹³C NMR (δ, splitting): 17.3 (quartet), 44.3 (singlet), 210.5 (singlet).
(A) HO₂CC(CH₃)₂CO₂H.
(B) CH₃O₂CCH₂CO₂CH₃.
(C) HO₂CCCH₂CH₂CH₂CO₂H.
(D) CH₃O₂CCH₂CH₂CO₂H.
(E) CH₃O₂CCO₂CH₂CH₃.