RT~ I remember our teacher said, but I forgot all of a sudden......Ask for advice!
Well, secondary carbon and oxygen double bonds do not add much. What is involved in high school?:1, in the nickel catalyzed conditions, with H2 addition (also a reduction, but note that in the carboxyl group -COOH carbon oxygen double bond can not be added by the general method plus H)2, aldehyde addition (aldol condensation). The college entrance examination had many times, is simply an aldehyde -CHO under certain conditions and containing active H group reaction R-H (commonly known as alpha H that -H doesn't have to be in the next -CHO H, like -COOH, phenyl can also, but to see more in the next -CHO generation of C- (OH) -R). The H is added to the O, and the alkyl R- is added to the C.For example: CH3-CHO+HCHO==CH3-C (OH) -CHO (called 2- 3-hydroxypropanal)There are some universities, the mechanism involved is more complex, you want to HI me
Such as esterification can be generated, as well as aldehydes oxidized into ketones, can produce carbonyl
Addition is in organic matter. Ester and carboxylic groups in C=O can not add, and aldehyde and ketone groups in addition to C=O, plus open a key in a C=O, into alcohol.
