Proton NMR

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  • Ferrocene Lab Report

    In Figure 9, the peak at approximately 4.0 ppm is attributed to the protons in ferrocene. Since cyclopentadienyl rings have symmetry and protons that are chemically equivalent, there is only one signal. The rotation of the rings around the iron center yields rapid equilibration of the protons in ferrocene.6 There are no neighboring protons, so the signal is a singlet. The other peak at approximately 2.0 ppm is due to the presence of H2O. This indicates that the ferrocene was not completely dry and there were traces of water in the sample tested for…

    Words: 1510 - Pages: 7
  • Ethyl Cinnamate Synthesis

    Experiment 5 Synthesis and NMR Spectroscopy of ethyl cinnamate Introduction: Wittig reactions involve the stereoselective synthesis of olefins from phosphonium ylides and aldehydes or ketones, where the carbonyl bond is converted to an alkene double bond.1 The variety of suitable reagents and the relatively mild experimental conditions facilitate their industrial applications, such as the synthesis of epoxides, esters, carotenoids and vitamin A.2,3 Specifically, the ester ethyl cinnamate is used…

    Words: 921 - Pages: 4
  • - 6-Diphenyl-2-Cyclohexenone Lab Report

    more ice cold ethanol was used to transfer the powder-like crystals. This error is also why there is a difference between the amount of partially purified product, and the purified product. The use of more solvent during all of the transfers would have increased the amount of product recovered, therefore increasing the percent yield. In order to confirm the identity of the product as 6-ethoxycarbonyl-3,5-diphenyl-2-cyclohexenone, 1H NMR, 13C NMR, IR, and melting point analysis was performed.…

    Words: 928 - Pages: 4
  • Interpretation Of The Noesy: Nuclear Overhauser Effect

    (3a) is as follows. Strong coupling interaction of protons of 2nd and 4th position in 1-(2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)azepan-2-one (3a), was not so strongly observed in COSY because it involves long range coupling i.e. protons attached between 2nd and 4th carbon atom. Hence, we studied NOESY to know the spacial interaction between these two protons. Thus, the NOESY of compound 1-(2-methyl-1,2,3,4-tetrahydroquinolin-4-yl) azepan-2-one (3a) is predicted as shown in Fig.5. In the NOESY…

    Words: 2832 - Pages: 12
  • Radioisotopes Research Paper

    unstable combination of neutrons and protons. All elements which have their atomic numbers greater than 83 are radioisotopes and have unstable, radioactive nuclei. They have at least one stable isotope and one unstable isotope. In order to gain stable conformation the nucleus of the atoms loses a neutron due to which radiation energy is given off and the atom is said to be in radioactive state. They are also called as radionuclides because they have more nuclear energy. These atoms are occur…

    Words: 1456 - Pages: 6
  • Nucleobases Lab Report

    Interactions of Nucleobases: NMR Investigations by H. Sapper and W. Lohmann Introduction Nuclear magnetic resonance (NMR) spectroscopy is often a very useful tool to identify organic molecules based on the atomic nuclei interactions with their environment. Recent advances have made use of the technology in protein, nucleic acid, and complex natural products structure identification. [1, 2, 3] Its origins lie in the works of Felix Bloch and Edward Purcell, who used the discoveries of Isidor…

    Words: 1614 - Pages: 7
  • Mercury Footwear Case Study

    1. Is mercury an appropriate target for AGI? Why or why not? Please clearly cite examples for your reasons. (10 points) There are many reasons that mercury is an appropriate target for AGI. • Both companies are in the same industry of footwear products. • First off the two companies have differentiating strategies and markets that they sell to. AGI will be adding a new market to their company goals and increasing their revenue streams. • AGI strives in the casual footwear segment with a…

    Words: 839 - Pages: 4
  • Why Is Lego The Most Ingenious Toy In The World?

    In the chapter “Democritus, Sophie is asked “Why is Lego the most ingenious toy in the world?”(Gaarder 44). This question then leads to the philosopher, Democritus, who is known for the atom theory. Alike the structure of legos, he believed all atoms that made up the universe were “eternal, immutable, and indivisible”(Gaarder 45). Furthermore, Democritus believed all atoms were firm and solid and were all different. Since they were all different, he thought they could join together and form all…

    Words: 1417 - Pages: 6
  • Thomson Plum Pudding Model

    charged electrons. Here, the electrons represents the plume in the pudding of positive charge. Hence his model was known as plum pudding model. It was also known as watermelon model where the positive charge was the flesh of the watermelon and the electrons were the sects. a) J.J. Thomson who discovered the electron in 1897, proposed the plum pudding model of the atom in 1904 before the discovery of the atomic nucleus in order to include the electron in the atomic model. b) In Thomson’s model,…

    Words: 1488 - Pages: 6
  • Analysis Of Henry Moseley's 'Completing The Table With A Bang'

    gap. This caused collisions, which was able to produce an X-ray wave. Using his observations, Moseley was able to conclude that there was a relationship between the number of protons, the wavelength of the X-ray, and the atomic number. Before this, atomic numbers were used without any particular meaning, just to represent the order of elements on the periodic table. Now, because of Moseley, people understand that the atomic number corresponds to the number of protons in the nucleus. Moseley was…

    Words: 1185 - Pages: 5
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