3推广 1)直链共轭多烯CH2=(CH-CH=)CH2 x 无简并 x 6,=a+2B cos I7 n+1 → 2 Or sin 4n+2规则 n+1 n+1 (,r=12…,n) a-2B 01 C 2)环状共轭多烯C-C-C…C a+2B 10 a=a+2B cos 2(-1) 2B i2x(j-1(r-1) B e 代我 +B X 1.2 01 a+2B3.推广 1) 2 2 ( )k 直链共轭多烯CH CH CH CH = − = 1 0 0 1 1 0 1 1 0 1 1 0 0 1 x x x x x = 1 0 1 1 1 0 1 1 0 1 1 1 0 1 x x x x x = 2) 环状共轭多烯C C C C − − ( ) 2 cos 1 2 sin 1 1 , 1, 2,..., j jr j n jr c n n j r n      = + +   =   + +   = ( ) ( )( ) ( ) 2 1 1 2 1 2 cos 1 , 1, 2,..., j i j r n jr j n c e n j r n      − − − = + = =   + 2   +   −   − 2 4 2 n + 规则   + 2    − 2 无简并