Anthracene Lab Report

The IR spectrum of anthracene has noticeable absorptions at 3190 cm-1, yielding a C=C-H alkane stretch; 890 cm-1, yielding a C-H bend; and 720 cm-1, yielding an aromatic ring. Comparison of the starting material versus product IR spectra reflects common absorptions for the C-H bend and the aromatic ring, which is to be expected. Comparative TLC reflected a dominant spot in the product columns, implying a very slim trace or impurity in the resulting product. The calculated Rf values support this conclusion. Anthracene, which is an aromatic hydrocarbon also known as a luminophore, contains an extensive conjugated system. Anthracene absorbs light around 380 nm and emits light at 434 nm. When observed with the long wave ultraviolet light, the otherwise colorless compound emits blue light. Conclusion: 9,10-dihydroanthracene-9,10-α,β-succinc acid anhydride resulted in 92% yield from the reaction of anthracene and maleic anhydride. This was confirmed by analysis of IR spectroscopy, melting point determination, and comparative

9-anthraldehyde and (carbethoxymethylene)triphenylphosphorane were reacted together using the Wittig reaction to produce E-3-(9-Anthryl)-2-propenoic acid ethyl ester. .100 g of 9-anthraldehyde and .180 g of (carbethoxymethylene)triphenylphosphorane were used. 9-anthraldehyde was a green powder while (carbethoxymethylene)triphenylphosphorane was a white powder. Both were added together into a 3.00 mL conical vial with a magnetic spin valve. The vial was inserted into a 120 C sand bath to melt the reagents. Once the reagents melted, they were stirred for 15 minutes (2:30 pm-2:45 pm). After stirring, the vial was removed to cool to room temperature. 3.00 mL of hexanes were added to the vial and the suspension was stirred. The solvent was removed

The purpose of this experiment is to practice common organic laboratory techniques inside the lab to get one oriented to the basic methods of procedure that can be used for later experiments. This experiment involves the separation of benzoic acid from a more crude form, consisting of benzoic acid, methyl orange, a common acid/base indicator, and cellulose, a natural polymer of glucose (Huston, and Liu 17-24). The technique that is used to perform this separation is called extraction. Extraction is a systematic process of separating mixtures of compounds, taking advantage of the affinity differences of compounds to separate them (Padias 128-37). This technique recognizes the principle that “like dissolves in like,” that is,

After about 1 minute of shaking, the two layers separated. The organic layer on the top layer (consisted of ethyl acetate and naphthalene) collected for further experiment; by adding Sodium Sulfate into organic phase and filtering the Na2So4 from the solution using the wool. The dried organic layer was weighed to get its mass and the residue of Na2SO4 were rinsed with ethyl acetate under vacuum (rotary evaporator). The acid extract on the bottom layer which is a combination of benzoic acid and NaOH were collected in the 50 mL Erlenmeyer beaker for the recovery of acid.

In this experiment, the reduction of a ketone to an alcohol using sodium borohydride was demonstrated. When the solution turned from yellow to colorless, sulfuric acid was added and the solution was set under reflux to allow for the complete dissolution of the solids. After cooling, the product was then isolated using vacuum filtration before mixed solvent recrystallization was used on it. An infrared (IR) spectra was obtained for the product along with the melting point and weight. The weight was further used to calculate the percent yield.

In figure 13, it can be seen that the reading wave infrared spectra of the ACS contained a large adsorption band around the wavelength that is at 2400-2800 cm-1 with two adsorption area, that isat wavelengths around 2000-2300 cm-1 with a stretch, and at a wavelength around 750-900 cm-1 with a stretch. Chemical activation using KOH can improve hydroxyl groups, as shown in Figure 13 wherein the adsorbent has a range of 3100-3600 cm-1. Adsorption bands at these wavelengths identify alcohol and phenol in O-H stretch on the surface of the adsorbent.

The purpose of this experiment was to perform a nucleophilic substitution reaction to construct a biologically active compound from two simple parts and then to recrystallize the product collected, which is a purification technique that purifies solids based on differences in solubility. In order to accomplish this, other techniques such as heating at reflux, and suction filtration were used. Heating at reflux is a technique used in lab that allows a solution to be heated for a certain amount of time once it begins boiling. Suction filtration is a separation technique that is combined with a water aspirator and was used to collect the product from this experiment, which was 2-methylphenooxyacetic acid.

Formal Laboratory Report #1: Antacids By Alex Broussard Co-Authors: Kevin McBean, Medgeen Joseph, Annette Elguezabal University of Central Florida March 14, 2015 Introduction: Antacids are popularly used for combating symptoms of an upset stomach [1]. Antacids are comprised of basic compounds, and when ingested, this increases the pH of our stomach acid (through an acid-base neutralization reaction), effectively eradicating pain and discomfort brought on by an excess of acid. All this is grand, but are all antacids made equal?

A pre-weighed (0.315g) mixture of Carboxylic acid, a phenol, and neutral substance was placed into a reaction tube (tube 1). tert-Butyl methyl ether (2ml) was added to the tube and the solid mixture was dissolved. Next, 1 ml of saturated NaHCO3 solution was added to the tube and the contents were mixed separating the contents into three layers. Once this was completed

I transported Mr. Baumchen to the Genesee County jail for a breath test. When at the Genesee County Jail I read Mr. Baumchen his chemical test right at 04:40 a.m. Mr. Baumchen agreed to the breath test.

In this experiment, the reduction of 4-tert¬-butylcyclohaxanone was performed using sodium borohydride. To complete this reduction, 0.5010 g of 4-tert¬-butylcyclohaxanone was added to 6.0 mL of methanol and heated until the ketone dissolved completely. Next, 0.0510 g of sodium borohydride was added to the solution. At this time, bubbles formed and an exothermic reaction took place. After the solution was stirred for 20 minutes, 2 mL of sulfuric acid was added to the flask. The solution became white and cloudy, and more bubbles formed. Immediately after the acid was added, 5 mL of water was also put into the reaction flask. The solution was stirred for 10 minutes. During this time, a white solid formed. After this, the solution was

To a solution of substituted chloro quinoxaline compound (2a) (4.5g, 12.9 mmol) weighed into a round bottom flask was charged with PdCl2 (dppf).DCM (6%mol, 0.633g). A toluene: ethanol mixture in 2:1 ratio (40 ml+20 mL) was degassed with nitrogen gas, and then added into the flask. Aqueous 1 molar sodium bicarbonate solution (24 mL, 19.30 mmol) was degassed and added to the mixture. The mixture was stirred at room temprature for 15 minutes under nitrogen. The 3-methyl phenyl boronic acid (2.1 g, 15.48 mmol) or respective boronic acid (2-methoxy phenyl boronic acid/ 3-methoxy phenyl boronic acid/ 2-fluoro boronic acid) was added as the solid.

Dispense .5 mL water into the already weighed conical vial, replace cap and face insert on its down side.

The build up of stomach acid may cause irritation and excess pain to individuals. Luckily, antacids being a weak base can help relieve the symptoms and pain. Antacids, such as Gelusil, Medi-Firs, Alka Seltzer, and Alcalak are neutralizing agents of acids that become helpful to the human body when heartburn occurs. Heartburn, also known as acid reflux is a common medical issue that occurs when hydrochloric acid (HCl) from the stomach moves backward along the digestive track to the esophagus (located within the throat). This reverse flow of fluids causes a burning sensation due to and possible sour taste that is characteristic of acids [1].

For this experiment, Alcohol D and Acid 2 reacted in the presence of concentrated sulfuric acid, resulting in a colorless solution with brown layer on top. After washes with sodium bicarbonate and brine, the pale-yellow liquid product was dried and then distilled. Distillation resulted in two colorless fractions, the second of which had a boiling point of 69-70 ˚C. This boiling point is unrealistic for any compound obtained in this experiment, so it was not used in identifying the product. After distillation, both fractions were spectroscopically analyzed. The IR and NMR spectra obtained for both fraction were identical, meaning both fractions contained exactly the same substance. Both fractions also smelled the same, like piña colada, therefore confirming this conclusion. This outcome also meant that the amount of product synthesized was 5.7393 g.