(1) CH 3 CH 2 CHO (2 points)
(2) ? (2 points) Newly prepared copper hydroxide suspension (1 point) bromine water or high Potassium manganate solution (1 point)
(3) (2 points)
(4) ?(2 points)?Addition reaction (1 point)
< p>(5) and (2 points).
Test question analysis: Use reverse inference: C → leucoaldehyde, C is; compared with cumyl aldehyde, it has 3 more carbon atoms, so X is CH 3 CH 2 CHO; forward inference: from the reaction information between aldehydes, A is; A is dehydrated to form B: , and H 2 is added to form C.
D is the compound product of and CH 2 =CHCH 3 , with and , and compared with the aldehyde, it can be seen that it is .
(5) Aromatic compound Y, which is an isomer of cuminaldehyde, cannot undergo silver mirror reaction, but can undergo elimination reaction. It does not have -CHO but has carbon-carbon double bonds and -OH. ; There are only hydrogen atoms in one chemical environment on the ring of the Y elimination reaction product, indicating that it is a para-position substituent, and the side chain contains the same number of carbon atoms, 2. Therefore there are and .