Alder's Identification Of Cyclo Pentadant To Electro

Improved Essays
The primary method of diene synthesis was used to report other reactions of this type for over 30 years. Diels and Alder reckoned the general widespread and nature of the Diels-Alder reaction and occupied most of their work and studies developing the consequences of the reaction. Kurt Alder focused attention towards the ease with which the reactions take place and the high caution of adduct. His early work involved the addition of cyclo pentadient to a p-quinone. The product of this reaction was previously questioned from the time of its original preparation in 1893 by Walter Albrecht. Diels and Alder were successfully able to analyze the structure of Albrecht’s compound correctly by utilizing the corresponding additive of Cyclo pentadient to Azoester. Alder and Diels were able to show …show more content…
The adduct was also demonstrated to always be a six-membered ring, with addition taken place between the double bond of the dienophiles and the carbon atoms of the one and four positions in the diene. In the 1890’s, Alder began to study the general experimental properties of the diene synthesis and the overall concept of the method for synthetic purposes. Kurt Alder was an able stereo chemist and showed how a diene addition took place at double bounds with a cis configuration. Alder showed that the reaction was equally general with respect to the dienophiles, given that the double bond was appropriately activated by nearby carbonyl, cyano, or carboxyl groups. The unsaturated compounds that did not have properly placed activating groups failed to result in

Related Documents

  • Improved Essays

    Wittig Reaction Lab Report

    • 1084 Words
    • 4 Pages

    The main solution containing dicholormethane, benzyltriphenylphosphorium and benzaldehyde was cloudy and white. This solution changed colors when the sodium hydroxide solution was added. After only a small amount of sodium hydroxide solution was added, the reaction solution became…

    • 1084 Words
    • 4 Pages
    Improved Essays
  • Superior Essays

    Dianne Termine Honors Chemistry Period 5 Group: 22 Topic: Dissolving Alka-Seltzer in Different Liquids Due Date: September 30, 2016 (2) Background Research The topic of this experiment is investigating and researching whether different properties in different types of liquids affect the amount of time it takes for an Alka-Seltzer to dissolve. The independent variable would be the amount of liquid being used to dissolve the Alka-Seltzer pill.…

    • 874 Words
    • 4 Pages
    Superior Essays
  • Improved Essays

    Experiment 11: Peptides and Amino Acids The purpose of this experiment was to study the amino acid composition of artificial sweeteners and then observe simple acid and base catalyzed reactions of the amino acid and artificial sweetener aspartame. This was achieved by performing a TLC analysis using ninhydrin as an indicator to observe the composition of the amino acid as well as two of the components that make up aspartame. This is followed by the addition of an acid or base to aliquots of diet sodas to examine the resulting reactions and compare them to a known hydrolyzed aspartame sample. The most common method of synthesizing amides is through the reaction of a primary or secondary amine with a carboxylic acid derivative.…

    • 882 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    In Experiment 12B we used an umpolung reagent in an umpolung synthesis to synthesize benzoin from benzaldehyde. Umpolung synthesis is a synthetic approach that allows us to switch the identity of a reacting species. For example, the normal chemical reactivity of a nucleophile can be switched to one of an electrophilic compound. Two common agents are cyanide and thiamine (Vitamin B). The mechanisms for both agents are the same.…

    • 484 Words
    • 2 Pages
    Improved Essays
  • Superior Essays

    (4) Scheme 4. The third possible product when 2-ethyl-1,3-hexanediol undergoes oxidation reaction.…

    • 1586 Words
    • 7 Pages
    Superior Essays
  • Improved Essays

    Dichloromethane was used as the organic layer of the reaction, which was later evaporated. The benzyltriphenylphosphonium chloride helps to transfer the ylide from the aqueous layer to organic layer. After this occurrence, the ylide then reacted with the cinnamaldehyde. A majority of the major product stayed in the organic layer, but some was recovered from the aqueous layer. After trituration and recrystallization, the product formed was weighed (~0.025g) and a melting point and IR spectrum was recorded for further…

    • 858 Words
    • 4 Pages
    Improved Essays
  • Improved Essays

    IR- and H-NMR-spectrum were taken. The Iodide is in the para position (also known as 5-iodosalicylamide), this is confirmed by the IR and the…

    • 960 Words
    • 4 Pages
    Improved Essays
  • Great Essays

    Abstract: The Grignard reaction was successfully accomplished. An amount of 1.20 ml of 2-methyl-2-pentanol was collected, and 9.60% yield was calculated based on the theoretical yield. Despite the low amount of 2-methyl-2-pentanol, its identity was confirmed by comparing the experimental refractive index and infrared spectrum to the literature refractive index and infrared spectrum of 2-methyl-2-pentanol. Statement and purpose The purpose of this experiment is to synthesize a specific alcohol by using the Grignard reaction.…

    • 1123 Words
    • 5 Pages
    Great Essays
  • Decent Essays

    Weight and melting point of the crystals formed were taken for further analysis. Enantiomeric carvones were compared by odor and optical rotation for analysis. The data collected from the comparison was used to analyze the physical and chemical properties of enantiomers. 6. Data and Results Dimethyl maleate was converted to dimethyl fumarate through…

    • 929 Words
    • 4 Pages
    Decent Essays
  • Improved Essays

    Dehydration is known as the process of removing water. During chemical dehydration covalent sigma bonds are broken into a hydroxyl group and a covalent sigma bond is broken to a hydrogen on an adjacent atom. A covalent pi bond forms between the two atoms on which the OH and H are bound and therefore chemical dehydration forms a new water molecule along with a new double bond. In this experiment 2-methycyclohexanol will react with phosphoric acid, the phosphoric acid will act as a catalyze.…

    • 483 Words
    • 2 Pages
    Improved Essays
  • Improved Essays

    This the reaction involves a tertiary alkyl halide, which is tert-butyl chloride, which further indicates that the reaction follows a SN1…

    • 1172 Words
    • 5 Pages
    Improved Essays
  • Decent Essays

    INTRODUCTION The purpose of this experiment was to demonstrate the stereochemistry of the electrophilic addition using (E)-Stilbene, a trans-isomer of ethylene. Bromine was added and reacted with (E)-Stilbene to form an alkene. A product was made with both a meso-stilbene dibromide and a d/l-stilbene dibromide, which is trans-stilbene dibromide. DISCUSSION AND CONCLUSION For the reaction to form these two different compounds with the same starting reactants, the double bond of (E)-Stilbene has to attack one bromide.…

    • 442 Words
    • 2 Pages
    Decent Essays
  • Great Essays

    Ethyl Cinnamate Synthesis

    • 921 Words
    • 4 Pages

    The IR spectrum of this product was acquired as shown in figure 2, where the peaks were present at 3061.55 "c" "m" ^"-1" , 1707.53 "c" "m" ^"-1" , 1637.67 "c" "m" ^"-1" , 1173.41 "c" "m" ^"-1" and 734.73 "c" "m" ^"-1" . Respectively, these indicated the presence of C-H bonds on the aromatic ring and the ethyl group, the carbonyl group, the alkene bond stretches, the C-O bond of the ester and the alkene bond bends. Subsequently, the ethyl cinnamate was identified by the characteristic alkene bond and the ester…

    • 921 Words
    • 4 Pages
    Great Essays
  • Improved Essays

    Paracetamol Lab Report

    • 651 Words
    • 3 Pages

    These two steps were already carried out and 4 amino-phenol was the amine used in the first part of this experiment. 4 amino phenol and acetic anhydride undergo a nucleophilic addition-elimination reaction. A reaction mechanism is a step-by-step process when reactant molecules change in their geometry in order to produce new products. This occurs due to omission or addition of reagents, where bonds are broken down to form new ones4. 4 amino-phenol contains two functional groups, an OH and a NH2 group attached to a benzene ring while acetic anhydride is a derivative of a carboxylic acid group.…

    • 651 Words
    • 3 Pages
    Improved Essays
  • Improved Essays

    The melting point of the product at this step was 145.9-147.1°C, which is slightly below the 150 ° C melting point of pure N-acetyl-p-toluidine but much higher than the 43°C melting point of the beginning p-toluidine. The slightly lower melting point could be caused by impurities in the sample. Along with melting point results, the IR spectrum shows a single N–H stretch peak at 1659.31 cm-1 showing the addition of a C=O and shows a peak at 3287.55 cm-1 which suggests an amide while the IR of sample 1 shows N–H stretches at 3416.53 cm-1 and 3334.84 cm-1 which suggests an amine. The 1H NMR shows the addition of an amide by having a peak of three hydrogens at 2.305 ppm that did not exist on the NMR of the…

    • 878 Words
    • 4 Pages
    Improved Essays