Wittig reaction

Report 1 Introduction The reaction time (RT) of students was measured in the experiment to determine whether light or sound stimulus initiates a quicker response time. The question of whether or not RT was related to movement time (MT) was also challenged. Each student performed two test in random order; one testing the reaction time of a red light stimulus, or visual reaction time (VRT); and the other testing the reaction time of a “beeping” sound stimulus, or auditory reaction time (ART). The student

catalyst, which is anything that helps to speed up, or catalyze, the chemical reaction (Bolster&Moss, n.d.). To speed up a chemical reaction, enzymes lower the activation energy, which is the initial energy required for a reaction to occur by applying heat. However, enzymes are very substrate-specific, only acting on specific reactants, which are the substrates, and consequently, enzymes are selective in the chemical reactions that they catalyze. Since an enzyme is a protein, each enzyme has a specific

that speed up chemical reactions without being used up in the process” (Leady). A catalyst helps speed up a chemical reaction without being changed during the reaction. Enzymes are specific meaning that they can work with only a specific set of chemical reactions. Most enzyme names end in -ase. The shape of a protein is very important in its function for the reaction. The molecule the enzyme works on is called a substrate. In order for this enzyme to work on this reaction the substrate must first

Relative Reactivity of Alkyl Halides in Nucleophilic Substitution Reactions Charlie Doyle Madison McGough Annie Chang   Introduction Both Sn1 and Sn2 reactions are nucleophilic substitution reactions, though they are slightly different. Sn2 reactions have bimolecular displacement and are also concerted, meaning the bond making and the bond breaking processes happen in one step.1 Sn1 reactions require two steps and have unimolecular displacement. This difference can be seen

cycloaddition, CuAAC, Diels-Alder reaction Introduction: The phrase "click chemistry" was invented by K. Barry Sharpless in 1998, and was first integrally described by Sharpless, Hartmuth Kolb, and M.G. Finn of The Scripps Research Institute in 2001.[1][2] In Chemical synthesis, “Click Chemistry” is a category bio-compatible reactions which have potential to be the special synthesis way of specific bio-molecules. It is not an isolated specific synthesis reaction, but include a sort of relevant products

by lowering the energy that the chemical reaction requires to occur. Certain enzymes only catalyze certain biochemical reactions and this property is known as enzyme-substrate specificity. Living organisms can produce many different enzymes. In order to further explain enzyme-substrate specificity, a basic knowledge about active sites on enzymes is required. An active site is where substrates can be bind to the enzymes and where the biochemical reactions are catalyzed. Active sites can be found

project to determine the level of the reaction Fe3+ + SCN- ↔ FeSCN2+. According to ACS Chemistry for Life, “analytical chemistry is the science of obtaining, processing, and communicating information about the composition and structure of matter” (Analytical Chemistry). In this experiment the interaction of iron(III) (Fe3+) and thiocyanate (SCN-) formed, which was processed and now being communicated through the quantitative data collected. Chemical reactions are constantly moving forward towards

BIODIESEL: A POTENTIAL RENEWABLE FUEL? 1. Introduction. The American philosopher, ecologist and scientist, Aldo Leopold introduced in his book ‘A Sand County Almanac’ in 1949 the idea of ‘thinking like a mountain’. This basic and simple phrase was later analysed and further explored by environmentalist philosopher Arne Naess. He stated that thinking like a mountain consisted mainly in realizing that humans are part of the biosphere, therefore, mankind should be able to recognize several responsibilities

Acid-Catalysed Propanone/Iodine Reaction Equation for the reaction : CH3COCH3(aq) + I2(aq) ——> CH3COCH2I(aq) + H+(aq) + I–(aq) Iodine + Propanone —> Iodopropanone + Hydrogen (cation) + Iodine (anion) Introduction: Aims: To vary the concentrations of each reactant along with the sulphuric acid in order to observe and measure its effect on the overall rate of reaction in absorbance using colourimetry. 2) Calculate the a mean rate constant using orders of reactions and the rate equation

plays an important role in accelerating the gas transformation, in which lowers the activation energy. As an important element in the chemical reaction, catalysts are required in different types of chemical reactions to increase the speed for reaction. During the process of speeding up reaction, the property of catalyst itself will not change as the reaction takes place. But there are other factors could affect the catalytic process, such as temperature, density, or pressure. Besides these factors