Ether Essays

CONCLUSION When you put an egg in vinegar, we see that the shell dissolves, but do you ever wonder why? An egg is made mostly out of calcium carbonate which reacts with an ingredient in vinegar, acetic acid. Acetic acid is about 4% of the vinegar and what breaks apart the solid calcium carbonate crystals. The bubbles we see, from the egg, is the carbonate that make carbon dioxide and the other calcium ions float free. This is the equation: CaCO3 (s) + 2 HC2H3O2 (aq) → Ca(C2H3O2)2 (aq) + H2O

Experiment #7: Column Chromatography of Food Dye Arianne Jan D. Tuozo Mr. Carlos Edward B. Santos October 12, 2015 Abstract Column chromatography is the separation of mixture’s components through a column. Before proceeding with the column chromatography itself, a proper solvent system must be chosen among the different solvents. The green colored food dye is the mixture whose components are separated. The ammonia: 1-butanol (1:1) solvent was the appropriate solvent to use for the column chromatography

In this experiment, the combined reactions are as follows. To start the experiment, the Grignard reagent, phenylmagnesium bromide, was formed by reacting bromobenzene with magnesium while using anhydrous diethyl ether as the solvent. Using anhydrous ether is crucial because if any water is present, the Grignard reagent will react with the water instead, which will ultimately terminate the reaction. Once formed, the Grignard reagent reacted with the benzophenone to form triphenyl magnesium

formation of triphenylmethanol is broken down in several steps. Magnesium is added to a capped and dried flask with a crystal of iodine, ether and a drop of 1,2-dibromoethane. The iodine was essential to activate the magnesium. Ether was used as the solvent because there are no acidic hydrogen’s on ether that can potentially react with the Grignard reagent and also because ether has two lone pairs on the oxygen that can help to stabilize the magnesium

periodically removed to alleviate pressure. The test tube was then left on the test tube rack to allow the solvents to separate. It had separated with the ether phase on top and acetone phase on the bottom. To see what light was being reflected, the tube was taken to the projector and it was recorded that the light reflected was red. The ether phase was used to paint with a brush approx. one inch above the bottom of a six inch chromatography paper. This step was repeated time

Abstract Properties Synthesis Applications Future Introduction Poly (ether sulphone) also called PES is an amorphous thermoplastic that has properties comparable to polycarbonates. However, polyether sulphones are more heat resistant and have other properties that make them suitable for a variety of high temperature applications especially those requiring service in excess of 200 oC. The polyether sulphones were first made by the Union Carbide Corporation, a subsidiary of Dow Chemicals, in 1965

from Acid and Base Impurities Discussion: The diethyl ether solvent is nonpolar; therefore, based on the expression like dissolves like, other nonpolar molecules will dissolve in it. The 9-fluorenone is a nonpolar molecule; therefore, it will dissolve in the nonpolar diethyl ether. The benzoic acid has a polar carboxyl group; however, the ring is nonpolar. The nonpolar ring in the benzoic acid is what makes it soluble in the diethyl ether. The ethyl-4-aminobenzoate is similar to benzoic acid, in

began with angelic allegiance to Apollo, the creator of the primordial universe.The world floating in a black abyss separated by the ethers, the crystal ice walls surrounding domes,

Introduction The purpose of this week’s lab was to enhance our understanding of the Grignard reagents that were examined in lecture. In this lab, a Grignard reagent will be prepared through the reaction of magnesium turnings and bromobenzene. Instead of isolating the product it will then be combined with benzophenone, which will give the final product of triphenylmethanol. Procedure To start this experiment the first step is to equip a 500-mL three-neck round bottom flask with a reflux condenser

chemical was determined as 4-chlorobenzyl phenyl ether. To give an overview of the overall process, recrystallization is used to make a pure product,

Phenols to ions. This makes them soluble in the aqueous layer as ions are soluble in water. However, addition of HCl to the aqueous ionic solutions regenerates non-ionic substances which are only soluble in the organic layer. Materials • 2M diethyl ether • Saturated NaCl solution • Saturated aqueous solution of Sodium bicarbonate • Distilled water

reagents are prepared by alkyl iodides, bromides and chlorides (Ketcha, 155). Aryl and vinylic Grignard reagents are prepared normally with iodides and bromides (Ketcha, 155). Second, “anhydrous, inert and basic (polar aprotic) solvent such as diethyl ether or tetrahydrofuran (THF) is required to solvate the magnesium” (Ketcha, 155). Thirdly, there are numerous functional groups that must not be present on the organic halide molecule to make it into a Grignard reagent (Ketcha, 158). Fourth, Grignard

Abstract In this laboratory, methanol is reacted with a tertiary alkyl chloride to make ether. The triphenylmethyl is isolated from the triphenylmethyl chloride. Methanol is then added and the class does the recrystallization . The methanol acts as a solvent for the reaction as a nucleophile. Because it is a tertiary benzylic halide, the reaction is considered an SN1 type. To test the purity, the class then uses a TLC.  When one places,” a spot of the substance on the absorbent surface of the TLC

James Venable after he had inhaled sulfuric-ether. James woke up with minimal pain and no recollection of what had happened. On that day Crawford Long single handedly change the course of medicine, but what led up to that pivotal point of his life? In 1815, Crawford Williamson Long was born to James and Elizabeth in Danielsville, Georgia,and named after William H.

solvent and reacting in air that is not humid/full of moisture. Two side reactions that are problematic but are not usually a concern are the Grignard with either O2 or CO2. These are negligible side reactions because the O2/CO2 present in the diethyl ether solvent is very small. Another problematic side reaction that cannot be avoided but can be minimized is the coupling reaction of the Grignard with the halide which forms a symmetrical hydrocarbon. This coupling reaction is minimized by keeping the

that was made with borneol and ethyl acetate. Once the reaction was complete the mixture was transferred into a separatory funnel where the ether and aqueous layers were separated and the aqueous layer was then extracted with two portions of ether. All ether layers were combined and extracted once again with 10% sodium bicarbonate and water. Once the ether layer was

region, there was an intense peak at 734. 51 cm-1, which could be the C-CL stretch found in dichloromethane, which means the product might not have been pure. This lab was successful to an extent because we were able to obtain the product, 2-naphthyl ether, but it was not pure since the IR spectrum showed traces of dichloromethane. Also the percent yield of the product was over 100%. Some sources of error in this experiment were that since the product in vial 3 had solidified, we had added a drop of

6.3 Synthesis of Metyltrifenylmetyleter (Tritylmetyleter) [11/02/2016] Introduction: The purpose of this lab was to attempt a full synthesis of Methyl Trityl Ether from Triphenylmethanol and Methanol using Sulfuric acid (H2SO4) as a catalyst. The reaction between triphenylmethanol and methanol is a Sn1 reaction which starts due to the acidity of the solution. An -OH group is a poor leaving group, however and -H2O group is not. The oxygen on the -OH group of the triphenylmethanol can commence

1.5.1.4 Method to prepare drug carrier There were various methods for the preparation of drug carrier depending on their nature. The common methods to prepare drug carrier were thin film hydration, reverse phase evaporation (REV), solvent (ether or ethanol) injection, and detergent analysis. a) Thin film hydration Thin film hydration method was one of the simplest way to prepare drug carrier. Basically, this method involved making thin film around the round bottom flask. The active ingredient

whether the compounds were miscible or immiscible. Diethyl ether and methylene chloride, diethyl ether and ethyl alcohol, water and ethyl alcohol, heptane and methyl chloride, and heptane and diethyl ether were all were found to be miscible each of these paired compounds showed a homogenous mixture with no chunks or particles left over when combined. On the other hand, water and heptane, water and methylene chloride, and water and diethyl ether were all immiscible, when mixed together it was observed