
n. [有化] 乙醇鹽;*********金屬
Compared with the activity of sodium methoxide, sodium ethoxide, sodium isopropyl, sodium tert-butoxide, the best base catalyst was sodium tert-butoxide.
比較*********、乙醇鈉、*********鈉和叔*********催化活性,*********鈉為最佳的催化劑。
The LiTaO3 thin film was chosen as infrared sensing film and prepared by a sol-gel process using lithium acetate and tantalum ethoxide as starting materials.
用醋酸锂和乙醇钽作為起始反應物,通過溶膠凝膠工藝生成了對紅外敏感的钽酸锂薄膜,并詳細讨論了基于钽酸锂薄膜的紅外探測器件制備工藝。
The results show that the vapour pressure and the mass loss rate of tantalum propoxide, tantalum butoxide and niobium ethoxide are suited for chemical vapor deposition.
結果表明,丙醇钽、丁醇钽和乙醇铌的蒸汽壓大小能夠滿足化學氣相沉積的要求,有足夠的揮發速率。
Synthesis of coumarin-3-carboxylic acid through sodium ethoxide catalyzed synthesis of coumarin -3-carboxylic acid ethyl ester, followed by saponification, acidolysis cyclization was stu***d.
實驗以*********、丙二酸二乙酯為原料,*********為催化劑催化合成香豆素- 3 -羧酸乙酯,再經皂化、酸解環合合成香豆素- 3 -羧酸。
n.|ethylate;[有化]乙醇鹽;*********金屬
Ethoxide(乙醇鹽)是含有乙氧基陰離子(C₂H₅O⁻)的一類化合物,通常以鈉、鉀等金屬鹽的形式存在(如乙醇鈉NaOC₂H₅)。其命名源自乙醇(ethanol)失去質子後形成的共轭堿,屬于強堿性試劑,在有機合成中廣泛用于催化反應或去質子化步驟。
乙氧基陰離子的結構包含一個氧原子與兩個碳原子相連(-O⁻-C₂H₅),通過金屬陽離子(如Na⁺)維持電中性。其堿性比氫氧根離子更強,例如乙醇鈉的pKa約為15.5,能在非水溶劑中高效奪取酸性較弱的質子。
乙醇鹽可通過金屬與乙醇反應生成,例如鈉與乙醇反應生成乙醇鈉和氫氣:
$$ 2, text{C}_2text{H}_5text{OH} + 2, text{Na} rightarrow 2, text{C}_2text{H}_5text{O}^- text{Na}^+ + text{H}_2uparrow
$$
乙醇鹽易吸濕并與水劇烈反應,需在幹燥惰性氣體環境下保存。操作時需佩戴防護設備,避免與皮膚接觸(美國化學會安全指南)。
Ethoxide 是化學領域的一個術語,具體含義和用法如下:
*********金屬的儲存需隔絕水和空氣,因其易水解生成乙醇和金屬氫氧化物。例如:
$$text{NaC}_2text{H}_5text{O} + text{H}_2text{O} rightarrow text{C}_2text{H}_5text{OH} + text{NaOH}$$
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