the carbonyl group. In this experiment‚ cinnamaldehyde is used as the carbonyl compound and yields mainly the trans‚ trans-1‚4-diphenyl-1‚3-butadiene. Purification was done via crystallization. Characterization was analyzed through TLC‚ UV-vis spectroscopy‚ and melting point. As detailed in Pavia’s Organic Laboratory techniques the reaction is expected to proceed via the following mechanism PROCEDURE The experiment was conducted using the procedures detailed in pages 327-333 of Pavia D.‚ Lampman
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Discussion and Scientific Explanations The reaction was conducted using granular tin and hydrochloric acid. This mixture provided both a source of electrons and protons1. The electrons worked as the reducing agent in this mechanism1. Granular tin was chosen over a single plate of tin due to the fact that it would take much more time and effort to fully dissolve a single plate of tin. A plate of tin would be more bonded to each other and less likely to be reactive. With the addition of the concentrated
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the left producing more isoamyl acetate to try and balance the reaction once again. Once the product was collected‚ it was purified through means of fractional distillation. Finally to characterize the product‚ and assess its purity‚ IR and NMR spectroscopy were taken. Reaction: Reagent Data: Compound Name | Mol. Weight (g/mol) | Mass (g) | Moles | Equivalents | BP (°C) | Density (g/mL) | Global Acetic Acid | 60.05 | 4.20 | 6.99E-2 | _____ | 118°-119° | 1.049 | Isoamyl Alcohol | 88
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physiological environments. Three tests are performed: the open circuit potential test‚ potentiodynamic polarisation and potentiostatic electrochemical impedance spectroscopy. Polarisation measurements are scrutinized in order to gain knowledge concerning the kinetics of the cathodic and anodic reactions‚ while the open circuit and impedance spectroscopy help to study the electrolyte-surficial interactions. It is found that coating nitinol with polyphenols reduces the metal‚ resulting in depletion of the
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www.visionias.cfsites.org www.visionias.wordpress.com IAS PHYSICS Main – Syllabus Paper- I: Section-A 1. Classical Mechanics (a) Particle dynamics Centre of mass and laboratory coordinates‚ conservation of linear and angular momentum. The rocket equation. Rutherford scattering‚ Galilean transformation‚ intertial and non-inertial frames‚ rotating frames‚ centrifugal and Coriolis forces‚ Foucault pendulum. (b) System of particles Constraints‚ degrees of freedom‚ generalised coordinates and momenta
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Influence of neutral zone in complete denture fabrication– A Case Report Abstract Completely edentulous patients wearing dentures since long time have a problem with decreased stability of their mandibular complete dentures because of severe resorption of lower edentulous ridge & altered neuromuscular control. By incorporating neutral zone technique in complete denture fabrication can overcome this problem. Keywords:- Condensation Silicone‚ Neutral Zone‚ Denture stability Introduction In edentulous
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Report for 2-ethyl-1‚3-hexandiol Calculations Theoretical yield: 1.857g Product Yield: 1.055g ----> Percent yield = (1.055g/1.87g) x 100% = 56.41% Starting amount of diol: 1.184g ----> Percent Yield = (1.184g/1.87g) x 100% = 63.32% Spectroscopy O-H (Stretch‚ H-bonded) C-H (Stretch) C-H (2720-2820 cm-1) Carbonyl C-O (Stretch) Product wavelength cm-1 3422 Strong‚ Broad 2877‚2936‚2964 Strong‚ Medium None Present 1705 Strong 1043 Strong Structure The Structure in
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synthesized by treating with malononitrile in the presence of piperidine as a base and ethanol as solvent. The detailed synthesis procedure given in the experimental section. The structure and purity of TPC was unambiguously confirmed by 1H and 13C NMR spectroscopy. The synthesized TPC is red in color and appeared non-fluorescent‚ the fluorescence of triphenylamine was completely switched-off in solid state. The UV-visible spectrum shows the strong absorbance at 460 nm and at 310 nm. In order to check the
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Summary of Presentation: Fe2+/H2O- mediated synthesis of Melanins: Cases of Homogentisic acid‚ serotonin‚ and norepinephrine The powerpoint presentation that I attended was titled‚ “Fe2+/H2O- mediated synthesis of Melanins: Cases of Homogentisic acid‚ serotonin‚ and norepinephrine‚” the research covered melanin which is a dark pigmentation that can cause other complication and pathological conditions such as‚ vitiligo and ochronosis. It is believed that melanin protects from ultraviolet light rays
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be consumed. Any impurities which are found in a drug or medicine can reduce the effectiveness. There are many ways of determining whether a product is pure or not‚ for example: filtration‚ crystallization‚ infrared spectroscopy‚ mass spectrometry‚ nuclear magnetic resonance spectroscopy‚ chromatography‚ electrophoresis‚ immunochemical reactions‚ ultracentrifugation and titration. The method used in this experiment was
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