练习 (书后P276题15) (4m .5 9101112_13141516 100 80 -H 3030 Vc=c(芳)1588,1494和1471 % 60 v2925 1380 δ,1442 40 C-N 1303,1268 -H 748cm(单 V93430,3300(双0 4000360032002800240020001900 6-NH2 1622 00150014001300120011001000900800700600 o (cm-1)练习 (书后P276题15) −H 3030 C=(芳) C 1588 ,1494和1471 (单) 1 748 − − H cm NH 3430 ,3300(双) 1622 −NH2 1303,1268 C−N 2925 3 as CH 1442 3 as CH 1380 3 s CH