Ethyl 3-Dihydro-4h Lab Report

The mean voltage of the battery terminals while connected to the identification resistors is presented in Figure ‎4 12. These samples have been pulled out from the voltage sensor of the PEB panel. The voltage decreased as expected from 12.53 to 12.5 during first 20 seconds of connection to the

In this experiment, the relative rates of free-radical chain bromination where determined. Five arenes were used for this comparison along with two controls for each set. One set was kept in the dark while the other was put under light. This allowed for better observation of the reactions, as the light set would proceed fast to show which arenes reacted slowest, while the dark set would proceed slowly to show relative differences between the faster reacting arenes. The time it took for the arenes to react was recorded to determine the relative rates of the reactions.

This was performed for the unknown compound and also the product of the synthesis reaction. First, to prepare a solution a scoopula was used to place approximately 0.05 g of the unknown compound in a section of the spot plate. A wash bottle was used to add about 2 mL of water to the compound, which was stirred with a stir stick until dissolved. A pipette was then used to add 10 drops of 6M HCl to the solution. When wafted toward the experimenter, a strong smell of vinegar indicates the presence of acetate formed due to acetic acid.

Yield: Assuming a reaction that uses up 100% of the cyclohexanone reagent, the theoretical yield is 2.32g. This could be calculated using the following calculation. The 1:1 ratio of moles cyclohexanone to moles bisphenol Z comes from the mole ratio in the reaction scheme.

The reaction was refluxed under nitrogen gas for overnight and completion was checked by the TLC (Ethylacetate: hexane; 2:3). The reaction mass was cooled to RT. Then the solvent was completely evaporated under reduced pressure. Obtained a black colored product. It was purified by silica column chromatography (10:90 ethyl acetate: hexane) to get the compound (3a-d)

Hydrogen Peroxide, otherwise know as H₂O₂ is the simplest of all the peroxide chemicals known to man. Hydrogen Peroxide is base that is used in many reactions to create other more complex peroxides, it is used as an oxidizing reactant in these cases. It is created in 4 steps. Step 1, Palladium catalyses the reaction between H₂ and anthraquinone to create anthrahydroquinone (H₂Q):

A unknown was assigned by the lab instructor which contained 4-aminobenzoate, Naphthalene, and Benzoic acid. The name of this unknown was Unknown B. This unknown was mixed with 2ml of methylene chloride which separated into an organic and an aqueous layer. The aqueous layer was on top.

An air-dried glass reaction vessel equipped with a magnetic stir bar was charged with, in order: 1,4-dioxane (15 mL), t-amyl alcohol (3 mL),2-bromo-3-chloro-5-methyl-6-(thiophen-2-yl)-5H-pyrrolo [2,3-b]pyrazine (0.84 g, 2.5 mmol), Pd(OAc)2 (0.057 g, 0.25 mmol), xantphos (0.25 g, 0.43 mmol), Cs2CO3 (1.66 g, 5 mmol) and tert-butyl carbamate (0.3 g, 2.5 mmol). The suspension was refluxed at 90 oC for 3 h. Once the reaction was complete by TLC, it was diluted with EA and filtered through a bed of celite. The filtrate was concentrated in vacuum. The residue was purified by silica chromatography (25% EA:hexane) to afford desired product as a crystalline solid.

In this investigation, the inhibition of Lactate Dehydrogenase (LDH) Enzyme isolated from Dissostichus mawsoni by oxamic acid will be analysed through spectrophotometric assays, and compared with parallel experimental data obtained from other groups using a different inhibitor (⍺-ketoglutarate), and using LDH obtained from a different fish (Squalus acanthias). LDH is a tetrameric enzyme with two different types of subunits, subunit M and subunit H. This allows the LDH enzyme to exist in five different isoforms. The differences between different isoforms of LDH will be examined through polyacrymide gel electrophoresis and subsequent stains for protein presence and activity.

Water is essential for all living organisms. The quantity and quality of water in communities are constantly analysed and surveyed to make sure whether the water is drinkable or not. During this investigation the

I am proposing that the identity of the pure compound used for this experiment is Ethyl-4-Nitrobenzoate. I am about 90% sure about this identification being the correct one. Ethyl-4-Nitrobenzoate has been recorded by multiple chemists to have a melting point between 57o and 58o. For our experiment, the pure compound began melting at 55.3o and did not stop melting until the thermometer reached 57.4o. When the pure sample was heated at a rapid pace, the melting point was between 50.3o and 57.6o. Even when the pure sample was heated at a slower pace, the melting point was still around 57o. While I may be 90% sure that my identification for this pure compound is correct, I am still 10% unsure if this is the correct and accurate identification.

The heat of combustion is known as the amount of energy (that is released as heat)

The speed at which ions exit a plasma is a critical parameter for the interpretation of plasma diagnostics, (-- removed HTML --) (-- removed HTML --) 1 (-- removed HTML --) (-- removed HTML --) the design of plasma-based manufacturing devices, (-- removed HTML --) (-- removed HTML --) 2 (-- removed HTML --) (-- removed HTML --) and plasma-material interactions in fusion experiments. (-- removed HTML --) (-- removed HTML --) 3 (-- removed HTML --) (-- removed HTML --) It has recently been appreciated that plasmas consisting of multiple ion species are susceptible to ion-ion two-stream instabilities in the presheath and that these instabilities influence the flow speed of ions at the sheath edge. (-- removed HTML --) (-- removed

The preliminary evaluation of the titled compounds 7a-7o and 8a-8e were evaluated for anticonvulsant activity utilizing the predictable animal models and the neurotoxicity was assessed by rotorod test method. Of these, the MES and scPTZ seizure models represent the two animal seizure models, most widely used in the search for new anticonvulsants. Data are presented (Table II) after the 0.5 and 4 h time intervals at the dose level of 30, 100 and 300 mg/kg. Phenytoin and carbamazepine were used as the standard drugs for the comparison.

can be considered equimolar and first order with respect to both sodium hydroxide and ethyl acetate, i.e., second order overall, within the limits of concentration (0-0.1M) and temperature (20-40°C) studied.