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.
Many sources of error were responsible for recovering a small amount of product. Introduction: The carbon-carbon bond formation is an important tool in organic chemistry to construct the simple as well as an organic compound. There are several
6.7, 6.8 Synthesis, Decomposition, and Displacement Reactions Kelly Mok SNC2DE-A Mr. Cox Partner: Nidhi S. Lab performed: September 18 & 19, 2014 Due: September 26, 2014 Purpose The purpose of this experiment is to observe and compare synthesis, decomposition, single displacement and double displacement reactions and the physical and chemical reactions that occur as a result. Hypothesis
For an E2 reaction to occur, the two groups being removed had t be anti to each other. This was easily accomplished in
In nucleophilic substitution reactions, there are two possibilities, either Sn1 or Sn2. In this particular experiment, an Sn2 reaction
It is understood the mechanism is acid-catalyzed where protons coordinate with the carbonyl oxygen to make the carbonyl carbon more electropositive for nucleophilic attack (Scheme 1). In the experimental procedure all reactants were added together, this is inefficient as the protons can coordinate with either trans-cinnamic acid or methanol. Coordination with methanol is unnecessary as it reduces its nucleophilicity and makes less protons available to coordinate with the carboxylic acid. To improve
Like isoquinoline, quinoline also coupled effectively with substituted benzoyl under identical conditions. The reaction went to completion in 2 h and the desired acyl addition product, 5a, was obtained in 76% yield (Scheme 4, Table 3) A plausible mechanism for the synthesis of an isoquinolin-1-yl-arylmethanone is depicted in Scheme 5. The synthetic cycle is assumed to begin with the reaction of Aliquat 336 as the phase transfer catalysis and K2S2O8 as a dehydrogenative reagent to generate the salt A, which then would convert to the sulfate radical B by heating. Sulfate radical B could react with the benzyl alcohol 1a through a hydrogen abstraction process providing an acyl radical C. Further addition of acyl radical C to the isoquinoline 1a
This was proved by utilizing the IR spectrum to verify the C =O was not in the final product as it lacked the 1640 cm-1 peak. The melting point of 113-115 degrees C proved that the final product obtained was the E-Stilbene. The TLC plate proved that the E and the Z product was produced, show cased by the double intensity of the DCM spot to the final product’s spot, both which had an Rf of 0.92. The double intensity proved that both products were produced, but through heating and filtering, the Z-Stilbene was
This reaction is shown below: n C2H3Cl (-C2H3Cl-) n As it could be observed in previous reaction, the only product that is formed in this stage is suspension PVC, whose medium size goes from 50 to 200 microns. Suspension
There were 9,000 Persian soldiers at the Battle of Thermopylae. According to Document B written by Ctesias, who was alive at the time of the battle” claims that he has access to the Persian archives in 398 BCE. In these archives he discovered this quote “His general Artapanus, with 10,000 men fought at the battle of Thermopylae”. Since Ctesias was a Persian I believe that he might have exaggerated the number of soldiers to make his country look greater and stronger. Another piece of evidence is that in Document C ,written by Ernle Bradford, a secondary source, states that their wasn’t enough water to support the previously estimated 210,000 Persian Soldiers but their was enough water for 9,000 soldiers.
This essay will explore different types of chemical reactions by performance enhancers (focusing on N2O) and catalytic converters and how these reactions have helped in the development of greater efficiency within cars. This essay will also describe and analyze the environmental impact it has. Performance enhancers are used by car enthusiasts all over the world to increase the rate of combustion within a car, which increases the speed of the car. Nitrous oxide is emitted when fuels are burned. Cars that have modified engines are the primary source of N2O emissions.
Links between many dream related By Alex Kent theories and Inception In this essay I will be looking at whether Inception supports Freud’s Dream Theory or the Activation Synthesis Theory. I will be analysing multiple scenes that promote their corresponding theory. These can be the likes of external dream influences, Freud’s many theories or the Activation synthesis theory In my first analysis it is not of a scene but of a concept in the movie.
Ever since Einstein first penned his famous equation, E = mc2, showing the world that there is energy stored in matter waiting to be harvested, mankind has been searching for new ways to free it. Initial work towards this goal led to the development of nuclear fission, the pinnacle of which was the successful Trinity Test in 1945. As time went on the technology was improved upon, resulting in nuclear power plants and more powerful weapons. Still, there was a desire for a more efficient, less dangerous, and more powerful means of extracting energy from matter. This desire was met with nuclear fusion.
As humans we live for our dreams and aspirations, yet we know so little about their biological purpose and function. The neural basis of dreaming is an enigma that many scientists have pondered over for centuries. From Plato and Aristotle’s theory of consciousness to Sigmund Freud’s hypothesis that dreaming is essentially a safety valve for our unconscious desires, numerous theories have made their way into the medical journals. Today, however, scientists tend to generally support one of these two surprisingly contrasting theories; activation synthesis and threat simulation. Activation Synthesis describes that (insert definition of activation synthesis).
C6H12 Possible side reactions: C6H6 + nH2 → cracking products C6H12 (benzene) ↔ C6H12 (methyl cyclo pentane) C6H6 + nH2 → C +
