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which is more polar and why?? chloroform/hexanes 30:70 or ethyl acetate/diethyl ether 20:80
1) Why do we use a mixture of ethyl acetate and hexanes as solvents in the synthesis of 5,6-endo-dicarboxylic anhydride? 2) What do the terms exo and endo refer to? 3) Why do we not do any TLC on the product in the synthesis of 5,6-endo-dicarboxylic anhydride?
The solvent: 70/30 (hexane/ethyl acetate)
Compounds: Hexane, 70/30 (hexane/ethyl acetate), and 95/5
CH2Cl2/CH3OH
I r ry Pus uey.UUT TU eu puru The solvent for TLC works well as separating these 3 compounds. Rationalize why it was chosen, discussing polarity of solvent and the 3 ferrocenes.
Among the mentioned above solvents choose the most polar solvent and write why you chosen this one: a) thyl acetate: b) hexane; c) chloroform; d) diethyl ether
A. Explain why an Sn2 reaction between ethyl methyl ether and sodium iodide is not favored but an sn2 reaction between diethyl ether and hydrogen iodide is more favorable. B. Explain why the major product of either reaction is not ethene, even with heating
Based on the figure above, the boiling point of diethyl ether
under an external pressure of 0.590 atm is ________°C.
a 20
b 0
c 60
d 30
34.6°C 78.3 °C 100 °C 800 760 Normal boiling point 600 Vapor pressure (tor) Diethyl ether Water 400 Ethyl alcohol (ethanol) 200 Ethylene glycol 0 0 20 80 100 40 60 Temperature (°C)
a 1:1 solution of ethyl acetate:hexane is more polar than a 2:1 solution if hexane:ethyl acetate? T or F?
Which is the most polar of each solvent pair? Toluene or Ethyl Acetate? Methanol or DCM (dichloromethane)? Benzene or Phenol? Benzoic acid or Cyclohexane?
Common solvents used in TLC analysis are hexane and ethyl acetate, the latter being more polar. A TLC has been performed on a mixture of two compounds. The solvent ran for 3 cm(plate length is 6cm) with 5% ethyl acetate in hexane. The two spots were not resolved, meaning they showed up too close to each other. What can you suggest to possible improve the results of the separation?
organic chemistry. why is CH3ONa not used in the claisen
condensation of ethyl acetate
12. Why is CH3ONa not used in the Claisen condensation of ethyl acetate? a. CH30 is a weaker base than the CH3CH20-which is used. b. CH3O- Nat is more difficult to prepare than CH3CH2O Nat. c. CH3O- would abstract a proton from the ethyl group of the ester. d. Use of CH,O- Na would result in transesterification e. CH,O- Na can be used as well as...
Which compound is more polar, and why?
앤 20 HO