2017年5月5日 · With NBS/$\\ce{CCl4}$ allylic bromination occurs. But with NBS/$\\ce{AcOH}$ bromination occurs on the alkene double bond. Why does this difference occur and how? I.e what will be the mechanisms of both?

2018年3月21日 · I would like to know how exactly is $\ce{AcOH}$ participating in these two reactions. Is it supporting the generation of electrophile? If yes, then how? I couldn't find any relevant information on the net. The second reaction is from Clayden's book and it doesn't highlight the role of $\ce{AcOH}$ there.

2022年8月15日 · I am unsure of how to go about designing a mechanism for the following molecule's reaction with AcONa and AcOH with heat. I thought perhaps it may work as a cyclisation reaction, forming an ether; or perhaps a decarboxylation. I've tried many of these mechanisms and none of them seem to give an answer that seems correct.

2017年3月20日 · Aldehydes, including aldoses, are oxidized to their respective carboxylic acids in the presence of $\ce{Br2}$ in $\ce{H2O}$.

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2018年4月1日 · Other reductive methods: $\ce {Zn/AcOH}$, triphenylphosphine ($\ce {PPh3}$), or thiourea ($\ce {NH2C(=S)NH2}$). Note: Recently, there is a publications claiming an efficient and convenient method for reductive workup of the ozonolysis reaction using sodium hydrosulfite.

2021年5月24日 · In chloroform a polymeric mono-ozonide is obtained. In MeOH the reaction takes a different course resulting in the formation of a cyclic methoxy-hydroxy-peroxide and a cyclic dimethoxy-peroxide. Reductive work up (Zn/AcOH or Me2S) of …

It is all about the electron withdrawing/ donating nature of the acid's functional groups. The more electron withdrawing the group, the stronger the acid will be.

Going back to the original question I can't see what the role of AcOH is. I would have thought that $\ce{AcOH/H_2SO_4}$ is a very nice way to make an acetate (esterification) but if you plan to dehydrate then I am not sure what AcOH helps with. Not much help sorry, hopefully someone else could answer this $\endgroup$ –