Multistep Synthesis of Tetraphenylcyclopentadienone Author: Instructor: Date work performed: 10.18.2012--10.25.2012 Date work submitted: 11.01.2012 Abstract: The aim of this experiment was to perform a multistep synthesis to form tetraphenylcyclopentadienone. The first step of the reactions was to synthesize benzoin from the condensation of benzaldehyde. A yield of 28.91% benzoin was obtained. The MP of benzoin was 127O-130O C and the IR spectra displayed a carbonyl peak at 3415 cm-1
Premium Functional group Alcohol Aldehyde
(2) ATOMIC ABSORPTION SPECTROSCOPY OF THE MIXTURE Experiment 4 Dates of Experiment: 10/14/08 through 10/30/08 Date of Report: 11/7/08 Chem 2262L � I. Introduction In this experiment‚ the zinc and nickel contents of unknowns were tested using two methods. In the first method‚ nickel and zinc were separated through ion-exchange chromatography and analyzed through chelometric titration. In the second method‚ the unknown was analyzed through the atomic absorption spectroscopy (AAS) of the mixture
Premium Chemistry Zinc Hydrogen
of this experiment was to successfully prepare an endo‚cis-diacid from the synthesis of the bicyclic anhydride (cis-Norbonene-5‚6-endo-dicarboxylic anhydride). The percent yield of the product was calculated and found to be 39.01%. The infrared spectroscopy confirmed the presence of a O-H group with a stretch at 2948.03 1/cm and the presence of C=O with a stretch at 1698.93 1/cm. Melting point determination found the melting point range of the products to be 149.2-164.1 for the bicyclic anhydride
Premium Distillation
It must be noted that the actual undertaken procedure included a few differences from the ideal protocol. A total of 7 ml of extra water was added to the reaction before it was treated in the separatory funnel due to there being so much white precipitate that the mixture had turned to a paste as opposed to a liquid. The aqueous layer was accidentally not drained between adding the two different ether fractions‚ so the aqueous layer was drained after that and 10 ml of extra diethyl ether were added
Premium Chemistry Solvent Diethyl ether
What is Chemistry? Chemistry is the study of matter and energy and the interactions between them. This is also the definition for physics‚ by the way. Chemistry and physics are specializations of physical science. Chemistry tends to focus on the properties of substances and the interactions between different types of matter‚ particularly reactions that involve electrons. Physics tends to focus more on the nuclear part of the atom‚ as well as the subatomic realm. Really‚ they are two sides of the
Premium Chemistry
9.1 PRELIMINARY STUDIES: 9.1.1. Identification and Analysis of Drug: Determination of λmax of by UV spectroscopy: The λmax of the solution of Pantoprazole was found to be 290 nm on UV spectroscopy. Melting point determination of drug: The melting point of drug was found to be 136±3 ̊C. Solubility determination of pantoprazole: The solubility of drug was determined and it is soluble in water‚ ethanol and slightly soluble in DCM. Solubility determination of excipients: Excipient Medium
Premium
The Book of Kells is a decorated manuscript that contains the first Gospels of the New Testament. The pages are illuminated which means it is embellished with colorful designs and pictures. The Book of Kells is famously known for its illuminated complexity and detailed concepts. It is on display at the Trinity College Library in Dublin‚ Ireland. This illuminated manuscript is exceptionally significant due to its renowned history‚ modern adaptations‚ contents of the Gospel‚ decoration‚ and sacramental
Premium Dublin
guide in this field of Semiconductor Laser Diodes. I would also like to thank Abhishek Upadhyay (P.G. student) for giving me insights into the concepts of semiconductor laser diode. ABSTRACT: Recent calibration‐free tunable diode laser spectroscopy (TDLS) techniques have shown that knowledge of the modulation characteristics of the laser is critical to achieve optimum performance of the sensor. This report investigates the intensity modulation characteristics of a near‐infrared
Premium Laser
History Alexander Gurwitsch around 1930 Around 1923 Alexander Gurwitsch discovers an "ultraweak" photon emission from living systems (onions‚ yeast‚...)‚ since he suggested connections between photon emission and cell division rate. He calls this photonemission "mitogenetic radiation". His experiments indicate that the wavelength is in the range around 260 nm (Bibliography under Gurwisch and also Ruth (1977‚ 1979)). Around 1950: Russian scientists rediscover "ultraweak photon emission"
Premium Laser Optical fiber Light
experiment is to isolate‚ purify and identify compounds 1 and 2 which contain 4-chlorobenzaldehyde‚ methanol‚ and aqueous potassium hydroxide. Compounds 1 and 2 are purified by crystallization. . The purified product will be characterized by IR spectroscopy and melting point. As detailed in Pavia ’s Organic Laboratory techniques the reaction is expected to proceed via the following reaction: Aqueous Organic The mechanism is shown below:
Premium Alcohol Functional group Chemistry