百度试题 结果1 题目CH3②用DMA()代替THF可以得到纯净的氨硼烷。由此推测NH,、THF CH3和DMA分别与B原子的结合能力由大到小的顺序为 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
Jordan′scation”metallocenespeptideszirconiumThe organometallic cation [Cp2ZrCH3(thf)]+, employed as the tetraphenylborate salt (1), reacts cleanly in 1:1 stoichiometry with the isocyanates 2 derived from valine methyl ester or valylvaline methyl ester, respectively. In each case addition of the...
通常认为固态格氏试剂RMgX中Mg的配位数为4,五配位的[CH3MgBr(thf)3] (thf =四氢呋喃)为其特例。近年的研究发现,在一些双齿配位的溶剂(如1,2-二甲氧基乙烷,简记为DME)中,固态格氏试剂可以六配位的形式存在,形成通式为[RMgA(dme)2] (R = Me、p-CH3C6H4-;A=卤素离子或四氢呋喃THF)的八面体配合物,此...
来源期刊 Oxygen Transport to Tissue XXXIII 1988 研究点推荐 5-Methyltetrahydrofolate (5-CH3-THF) (6S)-5-Formyltetrahydrofolate (1-CF) High-Dose (6R,S)-5-Formyltetrahydrofolate (Leucovorin) 引用走势 1990 被引量:1 站内活动 0关于
注:THF为四氢呋喃、Et为CH3CH2—、t—Bu为(CH3)3C—、Ts—为。(1)B→C的反应类型为___。(2)G中所含官能团名称为腈基、___、___。(3)设计步骤③的目的是___。(4)A的一种同分异构体同时满足下列条件,写出该同分异构体的结构简式:___。①分子中含有苯环...
百度试题 结果1 题目完成下列反应OLi(CH3)3SiCl(CH3)3CCI THF CH_3 TiCl4 相关知识点: 试题来源: 解析 OLi (CH_3)_3SiCl OSi(CH_3)_3 (CH3)3CCI 一 CH3 THF CH3 CH3 TiCl4 C(CH3)3 反馈 收藏
KANEHISA, N., KAI, Y., KASAI, N., YASUDA, H., NAKAYAMA, Y., TAKEI, K. and NAKAMURA, A. (1992), ChemInform Abstract: Facile Synthesis of Group 4-6 Transition Metal Phenoxides and X-Ray Structure of TiCl2(O-2,6-(CH3)2C6H3)2(THF)2 and NbCl3(O-2,6-(CH3)2C6H3)2(THF...
化合物G是合成一种镇痛药物的重要中间体,其合成路线如下:注:THF为四氢呋喃、Et为CH3CH2-、t-Bu为(CH3)3C-、Ts为。(1)A中所含官能团名称为___。(2)B完全加氢后的产物分子中含有___个手性碳原子。(3)C→D的反应类型为___。(4)设计步骤③⑤的目的是___。(5)A的一种同分异构体同时满足下列条件,写...
addition reactionsdoi:10.1002/chin.198147089E.C.ASHBYR.S.SMITHA.B.GOELJohn Wiley & Sons, LtdChemischer Informationsdienst
ТЕРМОЛИЗ (Acac)2SnX2 (X=Cl, N3), (CO)5MSnCl2(thf) (M = Cr, Mo, W), (CO)5MSn(Acac)2, (CO)5MSn(SCN)2, (CH3)4N(C 机译:复杂衍生物Sn(?)和Sn(。)的热分解特征。热解(Acac)2SnX2(X = Cl,N3),(CO)5MSnCl2(thf)(M = Cr,Mo,W),(CO)5MSn(Acac)2,(CO)5MSn(...