利用H182 酸催化水解带有光学活性的 3∘ 醇的羧酸酯 RCOOC∗R′R′′R′′′,得到含有 18 且发生部分外消旋化的 3∘ 醇 R′R′′R′′′C18OH。同样水解具有手性的 2∘ 醇的羧酸酯,生成醇的光学活性未改变,18 存在于酸分子中。试解释之。
1. The possible pressor effect of immediately after has been studied using anaesthetized Brattleboro with and of the Long Evans parent strain.2. A 0.5% of the body weight caused a significant decrease in mean arterial blood pressure, measured 10 min later, in Brattleboro , whereas this degree ...
(or 1 moles) of C18H34O2 (molar mass = 282.461 g/mol) and 45.927g (or 1.433 moles) of CH3OH (molar mass = 32.042 g/mol) it will have a theoretical maximum yield of 288.481g (1.067 moles) of C17H34O2 (molar mass = 270.451 g/mol) and 39.907g (0.433 mol...
C18H34O230282.46136 CH3OH4332.04186 产品 Isopropyl Myristate甘油 C17H34O232270.45066 C3H8O31392.09382 这个计算器将确定反应的限制试剂。 Instructions To calculate the limiting reagent, enter an equation of a chemical reaction and press the Start button. The reactants and products, along wit...
[答案]A [试题解析]由题意可知,1molC57H104O6完全水解可取得1mol甘油[HOCH2CH(OH)CH2OH]和3mol羧酸,说明该酯中含有三个酯基,那么水解应生成3mol水,那么可知3mol酸酸的分子式应为C57H104O6+3H2O-C3H8O3= C54H102O6,那么羧酸的分子式应为C54H102O6/3= C18H34O2,故答案为A。反馈...
答案:(1)CHCH22(2)2—丙醇(3)HO-(o)CH,OH HOV浓H.SOHO-⊙-CH2-OMo人+HO△(4)取代反应(5)C18H31N04(6)6;CH3HOOHHOOHCH3 相关知识点: 试题来源: 解析 解析:由题目信息,A分子式为C2H4,则不饱和度0=1,且A中只有1种氢,则A只能是CH-|||-CH-|||-2-|||-2已知B分子式为C3H-|||-8...
故答案为:CH3COOH+C2H5OH 稀硫酸 △ CH3COOC2H5+H2O; (2)乙醇催化氧化生成乙醛,反应为2C2H5OH+O2 催化剂 △ 2CH3CHO+2H2O,故答案为:2C2H5OH+O2 催化剂 △ 2CH3CHO+2H2O; (3)十八烷的裂化生成壬烷和壬烯,反应为C18H20 催化剂 C9H20+C9H18,故答案为:C18H20 ...
英文名:hBD - 3β - Defensin - 3human 单字母:H2N-GIINTLQKYYCRVRGGRCAVLSCLPKEEQIGKCSTRGRKCCRRKK-OH(Disulfide Bridge:C11-C40 & C18-C33 & C23-C41) 三字母:H2N-Gly-Ile-Ile-Asn-Thr-Leu-Gln-Lys-Tyr-Tyr-Cys-Arg-Val-Arg-Gly-Gly-Arg-Cys-Ala-Val-Leu-Ser-Cys-Leu-Pro-Lys-Glu-Glu-Gln...
a = 10 (C18H34O2) b = 25 (CH3OH) c = 16 (C10H20) d = 15 (C3H8O3) Step 4: Substitute Coefficients and Verify Result Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions...
关于盐皮质激素的说法,错误的是() A. 孕甾烷为母核 B. 具有4-烯-3,20-二酮 C. C17有OHD、C11上无羰基或有O与C18相连成环E、主要影响电解质代谢