Abstract The purpose of this lab was to use benzophenone and bromobenzene to synthesize triphenylmethanol. This was done via a Grignard reaction. The reaction was refluxed to form the Grignard reagent and then recrystallized to obtain a pure product. The melting point of the final pure product was determined to be 160 – 163.2 centigrade and the product showed IR peaks at 3471.83 cm– and 3059.52 cm–. Triphenylmethanol was synthesized with a 9.6 % yield. Introduction The […]
Purpose: To synthesize E,E-1,4-diphenyl-1,3-butadiene via Wittig reaction (Wittig Synthesis) using Benzyl triphenylphosphonium chloride and cinnamaldehyde in sodium methoxide. Reaction Equation(s):2 Procedure:2 A suspension of anhydrous methanol (1.0 mL), benzyl triphenylphosphonium chloride (0.7508 g, 1.9308 mmol), cinnamaldehyde (0.2415 g, 1.8273 mmol, 0.23 mL) and sodium methoxide (2.4 mL, 4.8 mmol, 2M) was stirred at 21˚C for 30 min. The crude product was isolated via semi-microscale vacuum filtration for 15 min. and rinsed with cold methanol and water. The […]
Abstract: The purpose of this experiment was to determine the yield, percent recovery and melting point of caffeine isolated from tea bag. During the experiment, a tea bag was heated in boiling water for about 15 minutes. The resulting mixture was collected for the extraction of caffeine. Caffeine isolation was accomplished from the mixture using methylene chloride. This is because caffeine is more soluble in methylene chloride than in water. Sodium carbonate was also added to the mixture. This was […]
Abstract Introduction: In Raman Spectroscopy is a powerful technique to analyze different compounds and has a variety of applications. The theory behind this is derived from the Raman Effect (1) The Raman effect refers to the scattering of light after it interacts with a molecule. When a molecule interacts with light, there is a change in the intensity of the light between the incoming and outgoing intensities. This can be described via the Beer Lambert law in equation 1. (2) […]
Acid- Base Titrations By Julia Trimble Introduction: A titration is a procedure in which two solutions are introduced to form a reaction that once completed, reaches an identifiable endpoint (Murphy, 2012, p.305). During a titration, the volume of one reagent, the analyte, is predetermined while the other reagent, the titrant, is prepared in a buret and slowly introduced to the analyte solution. The completion of this reaction can be determined via observation through the use of an indicator. The […]