Dichloromethane

[3] For the sake of extraction, spinach is first dehydrated with 100% ethanol so that extraction is more efficient. It is then extracted using dichloromethane (DCM) and maceration. The chlorophyll and β-carotene pigments are dissolved into the organic DCM layer which is polar and does not mix with water. The solution is then washed with sodium chloride (NaCl) to draw out any remaining water left in…

in the round bottom flask could have been exo- and endo-norborneol. Extraction and washing was performed and the exo- and endo-norborneol products formed were extracted into dichloromethane due to their similar solubilities, where the two products are overwhelmingly non-polar despite the one hydroxyl group. The dichloromethane (DCM) was the bottom layer formed, while the aqueous layer, the layer that was washed away, was the top and this was due to the weight of the chlorine atom that made DCM…

In this experiment, a Wittig reaction was performed in order to synthesize a mixtures of (E)- and (Z)-stilbene. Photoisomerization was then performed to isolate (E)-stilbene by transforming (Z)-stilbene into (E)-stilbene. The presence of the products throughout the experiment was monitored by 1H NMR. The final product was then characterized by 1H NMR, IR and its melting point. During synthesize of the product, the appearance of the reaction mixture changed. The main solution…

Since suitable crystals for X-ray single crystal analysis was not obtained, to have reliable structural information, HR-TEM analysis of the product was carried out. The average size of the assembly calculated from HR-TEM measurement is found to be 2.8 nm which is in good agreement with the size of the previously reported Pd6L8 assembly where L is the non N-methylated (2.5nm, Fig. 2).9 As first step, to explore the catalytic activity of 1 in copper and phosphine free Sonogashira coupling reaction…

It was then transferred into a 125mL Erlenmeyer flask along with 50mL of dichloromethane. dichloromethane solution was used to dissolve the solid mixture of compounds and separated using a separation funnel. An acid-base reaction proceeded and separated the solution into two layers based on their densities. The top layer contained the aqueous…

functionalities Typically, c-PEO-Br (0.55g) and NaN3 (0.73g) were dissolved in 20 ml DMF in a flask. The mixture was reacted at room temperature for 24 h. After the reaction is complete, the mixture was filtered through a column of neutral alumina with dichloromethane as eluent. The solution was then concentrated under reduced pressure to remove the solvents, and finally precipitated in cold n-hexane for three times to obtain the purified product c-PEO-N3. Synthesis of ethynyl-terminated…

Introduction: Limonene is a terpene that can be isolated from orange peels almost 100% in the (R)-(+)-limonene form. The essential oil from the orange peel belongs to terpenes, which are compounds that are made up of two or more five carbon units, named isoprene.1 The limonene is a monoterpene, which means it is made up of two isoprene units. Natural products are related compounds formally derived from isoprene units are terpenoids.3 The skeleton of terpenoids may differ from strict additivity…

Abstract: Chemiluminescence is an essential topic in the study of chemistry. The reaction involves mixing two chemicals were to form an excited (high-energy) intermediate that releases energy as light. This experiment first synthesized luminol by reducing 5-nitro-2,3-dihyodropthlazine-1,4-dione, using sodium hydrosulfite (Na2S2O4) and 3M sodium hydroxide (NaOH). The amount of luminol collected was 0.2693 g with the percent yield of 161%. The product of the first reaction was then used to…

p-nitrobenzaldehyde, 2,6-dichlorobenzaldehyde and benzaldehyde), triethylamine (TEA), p-terphenyl (TP) and ferrocene (Fc) were purchased from Sigma-Aldrich. Tetraphenylporphyrin (TPP) was purchased from Frontier Scientific. Acetonitrile (MeCN), dichloromethane (DCM), 1,4-dioxane, and other organic solvents used were spectroscopic grade. These solvents were distilled from appropriate drying agents under argon just prior to use. Water, Milli-Q grade, and argon of high purity were used. -…

The purpose of this experiment was to identify the generic name of the unknown drug through thin-layer chromatography analysis. By comparing the Rf values obtained from each TLC plate, it was deduced which components were present in the unknown drug. Through comparison of Table 1 and Table 2, Unknown A was identified as B.C. Tablets. Salicylamide was evident in the unknown substance due to the distinct blue color that was present in both the unknown spot and the salicylamide spot; the similar Rf…