[单选题]
Which row gives the correct number of 5 nef oi9dt,1z v5,hwkpeaks andieetrvp q/+ 0gyd,1 24oli v+o integration values for the structure below?2pir+v4t1ei+oe / ,qdlg o yv0
A. Peaks is 4 ; Integration is 6:1:2:3
B. Peaks is 4 ; Integration is 3:3:2:3
C. Peaks is 5 ;Integration is 3:3:1:2:3
D. Peaks is 5 ;Integration is 6:1:2:1:3
参考答案: A
本题详细解析: Explanation:
There are 4 proton environments as the $CH(CH_3)_2$ protons are equivalent. Integration gives the relative number of protons in each environment. There are 3 on C1, 2 on C2, 1 of C3 and 6 on C4 and 5.