| 24小時(shí)熱門(mén)版塊排行榜 |
| 3 | 1/1 | 返回列表 |
| 查看: 509 | 回復(fù): 2 | ||
[求助]
漢譯英
|
|
酯的堿性水解反應(yīng)大多數(shù)是屬于親核加成——消除機(jī)理,OH是較強(qiáng)的親核 試荊,直接與酯的羰基碳發(fā)生親核加成,在最后產(chǎn)物中OH并投有失去 而在酯的酸性水解中。酸本身的組成和質(zhì)量在反應(yīng)前后均未變化。它加快了酯的水解反應(yīng)速率。酯的酸堿反應(yīng)的不同機(jī)理解釋是酯在堿性條件下比酸性條件下反應(yīng)更快。 大概意思對(duì)就行,最好翻譯的學(xué)術(shù)點(diǎn)哈! [ Last edited by 天路5228 on 2013-8-17 at 09:27 ] |
木蟲(chóng) (小有名氣)
木蟲(chóng)
| The alkaline hydrolysis of ester is mostly the nucleophilic addition -- elimination, OH is a stronger nucleophile, which can make nucleophilic addition with carbonyl carbon of ester, and dosn't vanish in the final product but lost in the acid hydrolysis of the ester. The component and weight are both constant before and after the reaction, which enhance the rate of ester hydrolysis.The explanation for different mechanisms of ester acid-base reaction is that the reaction in alkaline is faster than that in acidic conditions. |

| 3 | 1/1 | 返回列表 |
| 最具人氣熱帖推薦 [查看全部] | 作者 | 回/看 | 最后發(fā)表 | |
|---|---|---|---|---|
|
[考研] 0856,材料與化工321分求調(diào)劑 +7 | 大饞小子 2026-03-27 | 8/400 |
|
|---|---|---|---|---|
|
[考研] 320分,材料與化工專業(yè),求調(diào)劑 +5 | 一定上岸aaa 2026-03-27 | 7/350 |
|
|
[考研] 化學(xué)調(diào)劑 +4 | 愛(ài)吃番茄的旭 2026-03-24 | 5/250 |
|
|
[考研] 一志愿北京化工大學(xué) 070300 學(xué)碩 336分 求調(diào)劑 +9 | vv迷 2026-03-22 | 9/450 |
|
|
[考研] 287求調(diào)劑 +10 | land xuxu 2026-03-26 | 10/500 |
|
|
[考研] 299求調(diào)劑 +6 | 嗯嗯嗯嗯2 2026-03-27 | 6/300 |
|
|
[考研] 341求調(diào)劑 +7 | 青檸檬1 2026-03-26 | 7/350 |
|
|
[考研] 333求調(diào)劑 +7 | 87639 2026-03-21 | 12/600 |
|
|
[考研] 329求調(diào)劑 +5 | 1() 2026-03-22 | 5/250 |
|
|
[考研] 352求調(diào)劑 +4 | 大米飯! 2026-03-22 | 4/200 |
|
|
[考研] 334分 一志愿武理 材料求調(diào)劑 +4 | 李李不服輸 2026-03-26 | 4/200 |
|
|
[考研] 一志愿 南京郵電大學(xué) 288分 材料考研 求調(diào)劑 +3 | jl0720 2026-03-26 | 3/150 |
|
|
[考研] 考研調(diào)劑 +6 | 來(lái)好運(yùn)來(lái)來(lái)來(lái) 2026-03-21 | 7/350 |
|
|
[考研] 材料與化工304求B區(qū)調(diào)劑 +3 | 邱gl 2026-03-25 | 3/150 |
|
|
[考研] 293求調(diào)劑 +7 | 加一一九 2026-03-24 | 7/350 |
|
|
[考研] 318求調(diào)劑 +5 | plum李子 2026-03-21 | 8/400 |
|
|
[考研] 一志愿河北工業(yè)大學(xué)0817化工278分求調(diào)劑 +7 | jhybd 2026-03-23 | 12/600 |
|
|
[考研] 一志愿山東大學(xué)藥學(xué)學(xué)碩求調(diào)劑 +3 | 開(kāi)開(kāi)心心沒(méi)煩惱 2026-03-23 | 4/200 |
|
|
[考研] 276求調(diào)劑 +3 | YNRYG 2026-03-21 | 4/200 |
|
|
[考研] 石河子大學(xué)(211、雙一流)碩博研究生長(zhǎng)期招生公告 +3 | 李子目 2026-03-22 | 3/150 |
|