424 



5. QUINONES 



O 

 /> - Benzoquinone 



CH3 



o - Benzoquinone 



O 



Toluquinone 



■^ 



CH, 



H3C' 



/>-Xyloquinone 



H3C 



CH3 

 CH3 



O 



Cumoquinone 



H3C il CH3 

 HsC'"^Y^CH3 



Duroquinone 



H3C 



/CH3 

 H CH, 



Thymoquinone 



H3CO 



CH, 



5-Methoxy- 

 toluquinone 



CU >\ .CI 



cr St^ "CI 

 o 



Tetrachloroquinone 

 (chloranil) 



1,2-Naphthoqulnone ^'^'^fsnu^^t^''^' 1 . 4-Naphthoqulnone 



