半缩醛
![半缩醛通式](/Images/godic/202501/17/Hemiacetal_general.svg2724.png")
![](/Images/godic/202501/17/AcetalFormation2724.png")
![Verhalten von D-Glucose in wässriger Lösung: Schließen des Rings unter Bildung eines cyclischen Halbacetals. Nicht animierte Version](/Images/godic/202501/17/Glucose_Fisher_to_Haworth2724.gif")
![Die Tropenfrucht Durian enthält Dithiohalbacetale](/Images/godic/202501/17/Pekawai_070314_0221_utk2725.jpg")
半缩醛（Hemiacetal）是一类同一碳上连有一个羟基，一个烷氧基和一个氢的有机化合物。半缩醛可由醛与醇反应得到，而半缩醛可以继续和醇反应得到缩醛。
半缩醛在酸性和碱性水溶液中都是不稳定的。
缩醛（酮）生成的一般过程：
hemiacetal
/ˌhemi'æsitæl/
英汉-汉英词典
n. 半缩醛
词组 | 习惯用语
您要查找的是不是：
- chemical n. 化学制品，化学药品 adj. 化学的
- homicidal adj. 杀人的；有杀人犯罪倾向的
- alchemist n. 炼金术士
- alchemical adj. 炼金术的
hemiacetal n. （化）半缩醛
hemiacetal linkage 半缩醛键
hemiacetal group 半缩醛基
网络短语:
inner driving drum hemiacetal 内半缩醛
aldosterone hemiacetal 醛甾酮半缩醛
inner hemiacetal 内半缩醛
E hemiacetal 半缩醛
hemiacetal bond 半缩醛键
trifluoroacetaldehyde methyl hemiacetal 三氟乙醛缩甲基半醇
trifluoroacetaldehyde ethyl hemiacetal 三氟乙醛缩半乙醇
英语例句库
- The thiophane ring was established via reduction of hemiacetal, mesylation of diol, and double SN2 substitution of dimesylate.
经半缩醛的还原，甲磺酸酯化，硫代关环，构建四氢噻吩环；
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中文百科
英语百科
Hemiacetal 半缩醛
![Skeletal formula of a hemiacetal](/Images/godic/202501/17/Hemiacetal-2D-skeletal2725.png")
![Hemiketal](/Images/godic/202501/17/Hemiketal-2D-skeletal2725.png")
![Above: 1-ethoxybutan-1-ol, a hemiacetal. Below: 1,1-diethoxybutan, an acetal](/Images/godic/202501/17/1-ethoxybutan-1-ol_1,1-diethoxybutan.svg2725.png")
![](/Images/godic/202501/17/Formation_of_hemiacetals2726.png")
Hemiacetals and hemiketals are compounds that are derived from aldehydes and ketones respectively. The Greek word hèmi means half. These compounds are formed by formal addition of an alcohol to the carbonyl group.
When the alcohol group is replaced by a second alkoxy group, an acetal or a ketal, respectively, is formed.
近义、反义、联想词
近义词
n.organic compound
联想词
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