[damac]

When compound A (C8H12) was treated with excess hydrogen in the presence of a palladium catalyst, the only product obtained was compound B (C8H16).  Treatment of compound A with ozone followed by zinc and acetic acid gave a 1:1 mixture of the two compounds shown below.  Determine the structres of compounds A and B, taking care to show all reasoning.

H3C-C(=O)-CH2-CH2-C(=O)-CH3          and         CH(=O)-CH(=O)

the oxygens are double bonds off of the top of the carbons

please help this question is beyond me i cant find anything in my text books  

[NISHANT]

THIS SUBSTANE-A IS CLEARLY A HEXAGONAL RING.
IT'S STRUCTURE IS LIKE:DRAW A HEXAGONAL RING,ATTACH A METHYL GROUP ON ANY TWO OPPOSITE CARBONS{PARA TO EACH OTHER},ON THESE SAME CARBONS ATTACH 2 DOUBLE BONDS ON THE SAME SIDE OF THE RING{WITHIN THE RING}.

THIS WAS A GOOD QUESTION

[AWK]

1,4-dimethylcyclohexa-1,3-diene

[NISHANT]

that is exactly what I have written.