a nucleophilic attack on the carbonyl carbon of the ketone‚ benzophenone. The result is an alkoxide that is then protonated to give the alcohol‚ triphenylmethanol. The purity of the final product will then be considered by melting point and IR spectroscopy. Final purified triphenylmethanol weighed 8.02 grams and melted at 158.5-162 degrees Celsius. Introduction: Grignard reagents are the most useful way to form primary‚ secondary or tertiary alcohols from a carbonyl group. The Grignard reaction
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Chemistry Revision F331 Isotopes - atoms with the same atomic number‚ but different mass numbers 131I - radioactive tracer for thyroid. 99Tc for tumours. Radioisotopes - gamma emitters & short half life - long enough to detect‚ but not long enough for damage. Beta particles emitters are more useful than alpha particle emitters because they penetrate more and so are more easily detected. Also‚ less damaging. The half life is the time taken for half the isotope to decay Mass left = initial
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Indigo Synthesis Author: Carolina Morales Group #1 Lab Partners: Jennifer Capeloto‚ Samantha Hoffman and Adriana Garibay Instructor: Saehan Park Chem. 152‚ Section 43 Date Work Performed: February 10‚ 2010 Date Work Submitted: February 24‚ 2010 Abstract: The percent yield of the color Indigo that is the color of blue jeans for the three trials was determined to be 13.50%‚ 15.30% and 14.80%. A series of experiments were performed to a cloth dye comparison. The absorbance
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INTRODUCTION: The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. Radiation can be said to be energy that travels and spread as it goes. The "electromagnetic spectrum" of an object has a different meaning‚ and is instead the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. We tend to witness different radiations of the electromagnetic spectrum without knowing‚ example is the visible light that
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Ancient Human Remains Lindow Man‚ Outzi • Places of discovery Lindow Man - Found in a peat bog in Cheshire‚ England 1984. By two workmen found a foot in their piece of machinery. Outzi Ice Man - Thursday 19th September 1991 by Erica and Helmut Simon as they were mountaineering in the Alps between Austria and Italy. • Describe the Physical appearance of Lindow man and dating of finds Lindow man - Radiocarbon dating techniques was used to date the Lindow man. We found that he
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Three-Dimensional Structure of Proteins Rotation around the -Carbon in a Polypeptide A Sterically Nonallowed Conformation The Helix and Pleated Sheet Conformationally allowable structures where backbone is optimally Hbonded (linear Hbonds). Helix (3.613 Helix): •3.6 residues/turn •Rise = 0.15 nm/ residue •13-atom hydrogenbonded loop Linus Pauling and Robert Corey‚ 1950 Pleated Sheet: •Anti-parallel or parallel •2.0 residues/”turn” •0.34 nm/residue (anti-parallel) or 0.32 nm/residue
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The knowledge of chemical analysis today has become important not only for scientists in their research but in fact bears influence in our daily routine as well. To recognize and classify these uses‚ we have to first understand‚ what is chemical analysis?Chemical AnalysisChemical Analysis is a body of procedures and techniques used to identify and quantify the chemical composition of a sample of substance.1 It may be said as a collection of all the techniques required to obtain any chemical information
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National Capital Region Division of City Schools Batasan Hills National High School IBP Road Batasan Hills Q.C. Engineering and Science Education Program “Dwarf santan (Ixora coccinea) as a Phytoremediation Agent in Lead (II) Contaminated Soil” Researchers: Leubert Monsy De Belen Rodeann Angelica D. Vallo Ms. Cristine Sealza Sañada Research Adviser ACKNOWLEDGEMENT This research paper would not be accomplished without the generous contributions of any individuals and organizations
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6.1 ABSTRACT The densities (ρ) and viscosity (η) were reported for binary mixtures of N-methylformamide with O-substituted aniline (2-chloroaniline‚ 2-methylaniline and 2-methoxyaniline) over the entire composition range from 303.15 K to 318.15 K and at atmospheric pressure 0.1 MPa. These experimental data have been used to calculate excess volume (VE)‚ deviation in viscosity (∆η) and excess Gibbs energy of activation of viscous flow (G*E). The variations in these properties with composition for
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fractional distillation. Once the fraction has been collected it must then be dried. The dried distillate is finally tested to determine whether or not it has been dehydrated. The three tests used were infrared spectroscopy‚ Bromine chemical test and Bayer’s chemical test. The infrared spectroscopy showed a large narrow peak at 3062.12(cm-1) and 3020.71(cm-1) which indicates that there is a double bond present. To assure the results were correct the chemical tests were done. The Bromine test was found
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