(3)y OY O∥ M+ Y MY H HY NY H 6 Y TY Y+[HY[H2Y++[H6Y+INYHLOYI Y [[[H2Y++[H6Y+Y+INYHIYLOYF2Y =a(B)+ay(M)+a(O-2…(三个副反应 aYy=aYm)+ay(N)-1…(二个副反应)1 ( )  Y  Y(H)  Y(N)   二个副反应 (3)Y [Y] [Y] [HY] [H Y] ... [H Y] [NY] [Y] [Y ] 2 6 Y          1 [Y] [Y] [HY] [H Y] ... [H Y] [Y] [NY]-[Y] Y(H) Y(N) 2 6             2 (三个副反应） [Y] [Y] [HY] [H Y] ... [H Y] [Y] [NY] [Y] [OY]-2[Y] [Y] [Y] [HY] [H Y] ... [H Y] [NY] [OY] [Y] [Y] ( ) ( ) ( ) 2 6 2 6 Y                        Y H Y N Y O  9