8. The following compound will have a proton NMR spectrum that shows:

(A) two singlets, area ratio 3:1.
(B) two singlets, area ratio 9:1.
(C) three singlets, area ratio 3:3:6.
(D) four singlets, area ratio 3:2:6:1.
(E) six singlets, area ratio 3:3:3:1:1:1.

相關試題

相關試卷