1-39 #3 (a) #1 #2 NH2 Htto#鞋 H H*to #3 、Htto#2 cH,®-&-， NH cH,-N-C-8, CH3-N-C-NH2 H本 NH. NH NH CH-N=C-2→CH,-N- G-NH→cH,-N-C=2 H interpret as being more basic. 1-40 (a)CHs-C-C=N:CH3-C=C=N: 1 minor :69 0: (b)CH3-C=C- CHqH8G=Ga4二ou-c- HH HH minor minor 699 0: C-CH3-→CH3-C=C-C-CH3。CH3-C-C=C-CH H H H minor major major negative charge on electronegative atoms-qul energy 20 Copyright2013 Pearson Education,Inc