Benzyne Formation and the Diels-Alder Reaction Preparation of 1,2,3,4 Tetraphenylnaphthalene Aubree Edwards Purpose: 1,2,3,4-tetraphenylnaphthalene is prepared by first producing benzyne via the unstable diazonium salt. Then tetraphenylcyclopentadienone and benzyne undergo a diels-alder reaction to create 1,2,3,4-tetraphenylnaphthalene. Reactions: Procedure: The reaction mixture was created. Tetraphenylcyclopentadienone (0.1197g, 0.3113 mmol) a black solid powder, anthranilic acid ( 0.0482g, 0.3516 mmol) a yellowish sand, and 1,2-dimethoxyethane (1.2 ml) was added to a 5-ml conical vial.
Abstract: In this experiment, triphenylmethanol was synthesized in two steps. First, the bromobenzene was reacted with dry magnesium turnings to produce Grignard reagent. Second, the Grignard reagent was reacted with methyl benzoate and concentrated sulfuric acid to produce an alcohol. The end result of the experiment was not very successful because only 17% yield of final product triphenylmethanol was recovered, and the final product was impure based on the melting point and the IR spectrum results.
The possible explanations and changes to make are similar to the previous questions. Conclusion and Future Experiment 18. The identity of the product and unknown were 4-tert-butylbenzyl phenol ether and tert-butyl phenol respectively. The key to making this discovery was the melting point and TLC results!
The purpose of this experiment was to prepare an unknown Grignard reagent and then identify the product by molecular weight and melting point. An IR reading was taken to further identify and validate what product was formed. DISCUSSION AND CONCLUSION Organometallic compounds consist of a carbon that is attached to a metal. The carbon atoms are strongly nucleophilic because of a partial negative charge that they carry.
Genetic engineering is changing the DNA code to express different traits. A plasmid is a circular piece of DNA that contains important genetic information. Recombinant DNA is the product after inserting your desired genes. The genes we hoped to insert in the pGLO lab were the GFP gene and the ampicillin resistance gene. GFP was needed so that we would tell if the ampicillin resistance gene had been properly placed when the bacteria glowed under a UV light.
This helps to indicate whether or not the reaction follows Markovnikov’s Rule, which states that the electrophile (E+) will add to the carbon involved in a double bond that produces the most stable carbocation. If the rule is followed, the reaction will proceed according to the mechanism in Figure 1. In the silver nitrate test, the alkyl bromide is added to AgNO3. The rate of precipitation with 2° should be faster than the solution with the 1° alkyl halide. In the sodium iodide test, the alkyl halide is added to sodium iodide in acetone.
Enzymes are an important part of the cell and are crucial to sustaining a healthy life for an organism. An enzyme is a protein, composed from amino acids, and an enzyme’s role in the cell is to increase the cell’s ability to perform chemical reactions (Brain 2000). The chemical reactions that cells perform are critical to the development of cells and are how cells grow (Brain 2000). Tyrosinase is an enzyme that is commonly found in plants, and its function is to cause plants to brown, a process known as melanization (Chang 2012). Dihydroxyphenylalanine (DOPA) is an amino acid that reacts with Tyrosinanse, and this reaction eventually leads to create melanin, a product of melanization (Waite 1991).
The specific purpose of this experiment is to determine the composition of vapor and liquid phases for different mixtures of a pair of volatile liquids using refractive values and distillation techniques involving the construction of two different types of phase diagrams. Moreover, these different phase diagram might be analyzed and compared individually in order to have a better understanding about the multiple types of phase equilibrium and phase change that occurs. For the procedure, the two components are benzoic acid and o-toluic acid. The first step of this experiment is to accomplish the part A: run samples A1 to A5 and B1 to B5. For this step, place a beaker of silicon oil on top of a hot plate until the temperature reaches 135 +/-
As a result, slight time measurement errors might have occurred that consequentially impaired the results. These errors could be avoided in future repetitions of this experiment by curbing the quantity of oxygen that is combined with the magnesium, as well as keeping the lid of the crucible open at all times, so as to continuously observe the substance inside, without threatening to potentially subvert any other
The Purpese of this unit is to preduce aromatic rich naphtha. Also, it to preduct aromizate to recovery unit. Figure 17:(BFD of Aromizing unit ) Main section: Figure 18:(BFD of aromizing section )
This allowed them to see the reaction in real time, with the help of X-ray crystallography. Due to this new technique, they observed additional transitional states previously unexplored as well as suggesting a third magnesium ion is involved in the reaction. They believed and proved, that by using their technique, intermediate states
To investigate the effect of agitation time and feed concentration on percentage removal of phenol batch experiments were carried out at room temperature in the range of 100 to 700 mg/l of initial feed concentration and the results are shown in Fig. 2.Experimental conditions used were agitation speed of 200rpm, biosorbent dosage 0.15 g and pH 7.From figure it is observed that with increase in agitation time from 0 to 2 days, the percentage removal increased from 8% to 98%.Phenol adsorption from bulk liquid to biosorbent is high when the agitation time was increased. This leads to a higher adsorption of phenol on the biosorbent surface and it could reach an equilibrium beyond which percentage removal may not increase. In the present study equilibrium is reached at 4 days.
This modified product of the protonated MMT was utilized to prepare
Purpose/Introduction The process of recrystallization is an important method of purifying a solid organic substance using a hot solution as a solvent. This method will allow the separation of impurities. We will analyze Benzoic Acid as it is dissolved and recrystallized in water and in a solvent of Methanol and water. Reaction/Summary
Abstract The unknown concentration of benzoic acid used when titrated with standardized 0.1031M NaOH and the solubility was calculated at two different temperatures (20◦C and 30◦C). With the aid of the Van’t Hoff equation, the enthalpy of solution of benzoic acid at those temperatures was determined as 10.82 KJ. This compares well with the value of 10.27KJ found in the literature.
