Ethyl acetate

1mM in deionized water was used to plot a standard curve, the activity of pectin was determined relative to 1mM of the standard. The stock solutions include 300mM acetate buffer, pH 3.6, 10mM TPTZ (2, 4, 6-tripyridyl-S-triazine) solution in 40 mM HCl and 20 mM Fecl3.6H2O. The working solution was prepared fresh by mixing 25 ml acetate buffer, 2.5 ml TPTZ and 2.5 ml FeCl3.6H2O, and its temperature raised to 37ºC before use. 150µL of pectin solution was mixed with 2850µL of FRAP solution for 30…

(+) enantiomer to be soluble in methanol while the (-) crystallized out in methanol. The methanol and solute where separated from the crystals. The crystals were then dissolved in 75 ml of 8% NaOH to separate the amine from the tartaric acid. Ethyl acetate was used to separate the amine from the…

recovered from the column and were collected. The results obtained were 97 mole% benzene, 96 mole% toluene and 98 mole% xylene. In this process separation of acetonitrile from waste solvent acetonitrile is carried out.  The impurity contains isopropyl acetate, hydrogen cyanide, acrolein, oxazole. The temperature of the process is between 140 to 170°F and the pressure of the process is 1.26 kg/cm2 .  The concentration level of the organic impurities in the waste solvent acetonitrile is…

The objective of the present study is to isolate piperine from the black pepper. Our attempt was to extract the piperine with petroleum ether from black pepper and isolation using the same solvent. It is very difficult to extract and isolate the piperine using a non-polar solvent like petroleum ether due to solubility. During our study, we observe that piperine have a very little solubility in the petroleum ether, at the same time the solubility of the resinous material in petroleum ether is…

CHEM 8 A Stereochemistry Report Scaffold Introduction The purpose of this experiment was to find out the absolute configuration of 1-phenylethanol. This was accomplished by using the method of competitive enantioselective conversion (CEC), where 1-phenylethanol reacts with one enantiomer of the chiral catalyst homobenzotetramisole (HBTM). The technique that was applied was thin-layer chromatography (TLC), which will determine the HBTM enantiomer that will react faster. Theory The difference…

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…

have been synthesized by Pabon method from most literature reports, which through the condensation of the acetyl acetone (pentone-2,4-dione)-boric oxide complex and an aromatic aldehyde in addition of tributyl borate and butylamine at 60°C with ethyl acetate as the solvent.8 This synthetic method involves aldol condensation, by forming acetylacetone-boron complex, and cleavage of the complex via hydrolysis under acidic condition. The Pabon method indeed is an easy experiment to perform however,…

Now Saad has to synthesize the compound in order to see if he will get a solid instead of another liquid. The characterization of soluble on polar solvents are that ETOH, DMF, Isopropanol, and Ethyl acetate are soluble for the polar solvents. However Chloroform, Hexane and Benzene are insoluble for polar solvents. The characterization of infrared spectrophometry there is symmetric vibration and asymmetric vibration. Symmetric vibration is pulling…

PHA 6840 Assignment #9 1. Inhalants are classified as volatile substances that generate chemical vapors, which after inhaled produce a mind altering effect. The category of inhalants consists of a broad range of chemicals including: volatile solvents, gases, aerosols, and nitrates. The different forms of inhaled substances can be found commonly in industrial, medical, and household products. According to the Monitoring The Future Survey conducted in 2016, there is a significant decrease in…

Under oxidative conditions, certain nucleobases (for example, adenine and cytosine) can form N-oxides. Also, the C8 position of guanosine is vulnerable to hydrolytic attack under either strongly acidic or strongly alkaline conditions. The 5,6 double bond of pyrimidine nucleosides also reacts with halogens and halohydrins to give the corresponding addition products (Shabarova and Bogdanov, 1994). Selected examples of the side reactions that occur during oligonucleotide synthesis are given below.…