Liquid - phase oxidation of alkane under mild conditions 溫和條件下烷烴的液相氧化進(jìn)展
On the contrary to the vinyl and aryl chlorides , the oxidative addition reaction of zerovalent palladium to chloro - substituted phosphaalkenes proceeded smoothly under mild conditions 摘要與氯代烯烴或芳烴相反,氯代膦烯與零價(jià)鈀的氧化加成反應(yīng)可以在溫和條件下進(jìn)行。
A new convenient synthesis of a series of polyfluoroalkyl substituted cyclopropane derivatives was achieved by the reaction of polyfluoroalkyl iodides with diethyl allylmalonate in the presence of sodium dithionite in 45 % ~ 55 % yields 摘要以連二亞硫酸鈉為引發(fā)劑,烯丙基丙二酸二乙酯與多氟烷基碘代烷在溫和條件下反應(yīng),方便地得到一系列多氟烷基取代的環(huán)丙烷衍生物,產(chǎn)率45 % ~ 55 % 。
3 . the reaction of lanthanide powder with anthracene in the presence of ticl4 catalyst in tetrahydrofuran at 0 - 60 under normal pressure generated organolanthanide compounds , which are less thermal . it was found that the decomposition of the organolanthanide compounds in vacuum could give rise to lanthanide powder of nanometric size with high purity accordingly 3 .納米尺寸鑭系金屬粉末制備的研究溫和條件下,采用絡(luò)合催化法合成鑭系金屬有機(jī)化合物,利用它的熱不穩(wěn)定性,在真空條件下進(jìn)行熱分解來制備納米尺寸鑭系金屬粉末。
1 lanthanide hydrides ( m = la , nd , sm , dy and yb ) can be prepared easily by the direct hydrogenation of lanthanide metals catalyzed by ticl4 in tetrahydrofunan ( thf ) under normal pressure . the rate of hydrogenation decreased with increasing atomic number of lanthanides . transmission electron micrographs showed that the resulted lanthanide hydrides were in the form of nanoparticles with an average primary particle size around 20 - 40 nm 本論文首次提出一種在溫和條件下催化合成納米尺寸的鑭系金屬氫化物的方法,介紹在常溫常壓下,鑭、釹、釤、鏑、鐿五種鑭系金屬在四氫呋喃( thf )溶劑中,催化劑作用下與氫氣直接化合形成相應(yīng)的納米尺寸的鑭系金屬氫化物。