3.7 Nuclear Independent Chemical Shift Analysis The Nuclear Independent Chemical Shift is measured as magnetic shielding of a molecule have been calculated at the B3LYP/6-31G theory level. Aromaticities are represented by negative NICS Values and antiaromaticity is represented by positive NICS Values. The large negative NICS Values of the title compound represent stronger aromaticity [29-35].Our present investigation of the density functional calculations of doped fullerene with glycine shows several
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Objective: The goal of the experiment was to use UV/VIS spectroscopy to collect data to quantify acetaminophen‚ aspirin‚ and caffeine from a migraine tablet where there is heavy spectral interference using Target Factor Analysis1. The migraine tablet has other ingredients in it like FD&C blue #1‚ stearic acid‚ and saccharin. Saccharin is the ingredient thought to have the biggest interference and was used as the experimental basis2. Instruments: UV/VIS spectroscopy was used to analyze the absorption
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(1) Answer to Question in lab manual. NO introduction/background etc. 1. What is the retention time for caffeine? Retention time for caffeine : 4.149+4.142+4.152+4.1454 = 4.15 2. What is the retention time for benzoic acid? Retention time for caffeine : 2.651+2.817+2.857+2.9274 = 2.81 3. How are the retention times for caffeine and benzoic acid related to their chemical structure and the nature of the chromatographic
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In this lab‚ we extracted spinach pigments‚ and analyzed what colors of light these pigments absorb. By using TLC plate‚ hexane and acetone‚ I separated the pigments of spinach‚ and discovered that the main pigments were green and yellow. This works because with different polarities‚ pigments move at different rates. Hexane and acetone were also used to separate chlorophyll and carotene from spinach. Since they are polar‚ they can separate organic and inorganic things. From the experiment‚ I know
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corresponding anthocyanidins using paper chromatography‚ and spectrophotometric analysis procedures. Based on experimental data the blueberries contained the most amount of anthocyanins at 1.92 x 10-6 g‚ followed by blackberries at 1.19 x 10-6 g‚ finally followed by raspberries at 5.84 x 10-7 g. The paper chromatography data also supports the idea that blueberries contained the most anthocyanidins‚ since it contained the most streaks on the chromatography paper. The main conclusion that can be
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Plant Pigment Chromatography VII. Analysis (Questions) 1. What factors are involved in the separation of pigments? Factors that are involved in the separation of pigments can include pigment solubility‚ the attraction between the pigments and paper and the size of each pigment particle. Because of these factors the results were as they were. Beta-carotene traveled the furthest because it forms no hydrogen bonds to the chromatography paper and is slightly soluble in the solvent. Contrastingly
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5.05 Ink Chromatography Basic Lab Components Background Information and Research: 1. Paper chromatography type of method that is used to separate mixtures of substances from a solution. 2. There are many uses for paper chromatography‚ especially concerning the fields of chemistry and biology. One use is to allow scientists to detect any sort of contaminants is rainwater. Another use is to identify clues at a crime scene such as blood‚ ink‚ or drugs. However‚ the more common use is to
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Results and Discussion 2.5.1. Morphological characterization of hollow fiber capillaries from FESEM images The longitudinal view of the hollow fiber is presented in Fig.3 (a). The outer surface was further magnified to look into the pore details in 5KX and 25 KX magnification‚ are shown in Fig.3 (b) and (c).The image of the hollow surface revealing the cut surface showing the inner layer of the hollow fiber are shown in Fig.3 (d). The fine structures of the fibers ‚ shown in Fig.3 (e) and (f) resembles
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6. FIRST DERIVATIVE ZERO CROSSING METHOD 6.1. ABSTRACT: Simple‚ specific‚ accurate and precise 1st order derivative zero-crossing spectroscopic method was developed for simultaneous determination of PHENYLEPHRINE and EBASTINE from their binary mixture. In this 1st derivative zero-crossing spectroscopic method the amplitudes of the 1st order derivative of the spectra of the binary mixture containing PHE and EBS were measured at 252.2 nm (zero crossing of EBS) for determination of PHE and at 274.8
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. Yes‚ comparably to TLC plate 2 and 3. The benzophenone is more neutral but as the same time its nonpolar‚ being that Silica gel in TLC 2 was polar and the solvent ethyl acetate-hexane is non-polar it moved relatively with the solvent. The stationary phase in TLC 3‚ alumina is non polar and the solvent ethyl acetate is polar so from the ideal that polar does not attract non-polar benzophenone stick stronger to alumina non-polar rather than moving up with polar solvent ethyl acetate as it did in
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