The Grignard Reaction Synthesis of triphenylmethanol Josh Wilson Chem 443-003 January 1,2012-February 7,2012 Introduction In this experiment we synthesized triphenylmethanol from a Grignard reagent and an ester. To form triphenylmethanol we reacted methyl benzoate with phenylmagnesium bromide. Reaction Scheme: Theory An organometallic compound is an organic compound that contains a Carbon-metallic bond. The metal can be Li, Na, Mg, Cu, Pd or any other transitional metal. In this lab we used Mg as our metallic portion of the organometallic compound.
CHEMISTRY HOMEWORK 1. All of the statements concerning the carbonyl group in aldehydes and ketones are true except A) the bond is polar, with a slight negative charge on the oxygen atom. B) the bond angles about the central carbon atom are 120°. C) the carbonyl group is planar. D) in condensed form the carbonyl group can be written as -CHO.
This is similar to theoretical percent that you used to calculate the percent error in an experiment. The actual yield is the amount of product that is actually obtained in an experiment. This is similar to the actual or experimental percent you used to determine the percent error in an experiment. The formula for percent yield is Actual yield x 100 Theoretical yield For example: if a reaction actually gave you 6.63 g of nitrogen instead of the predicted 10.6 g, the percent yield of nitrogen would be: 6.63 g N2 x 100 = 62.5 % 10.6 g N2 1. According to her pre-lab stoichiometric calculations, a student’s lab experiment should have produced 5.51 g of NaCl.
10-24-2010 Experiment #1- Synthesis and Resolution of a Chiral Nickel Complex Eric Latch Allegra Marchione and John Curto Introduction The first point of this experiment was to study tris-nickel complexes, which are the most stable variety of the three types of bivalent nickel compounds. The other was to see how two enantiomers of a chiral complex have varying physical and optical properties. This first part of this experiment involved the synthesis of a racemic mixture of dl-tris(1,10-phenanthroline) nickel(II) chloride. After the formation of this mixture, one enantiomer was precipitated out of solution via the addition of a chiral tartrate ion. This enantiomer was then isolated in order to be characterized.
The acids are determined on how much H they have and bases are determined on how much they mess with the hydrogen concentration. When looking at the acid and base used in this lab HCl is an acid and NaOH is a base. To determine a pH value the molarity of the acids and bases must be below one, so using .1 M NaOH and HCl is ideal. To measure the pH the mathematical equation is used: pH = -log [H+] and pOH = -log [OH-]. When adding these up the end result has to be 14 because acids go from 1-7 and basic from 14-7.
Ocean County College Department of Chemistry [Observations of Chemical Changes] Submitted by Andrew Grimm Date Submitted: 5/31/14 Date Performed: 5/31/14 Lab Section: Chem-181DL2 Course Instructor: Amal Bassa Purpose The main goal in this experiment is to observe the properties of simple chemical reactions, and relating their chemical properties to household products. Procedure To begin this experiment I placed two drops of NaHCO3 into well A1 of the 96-well plate, and then added two drops of HCl into well A1. Next I placed two drops of HCl into well B2, and added two drops of BTB, and observed the color. Then I placed two drops of NH3 into well C1 and added one drop of BTB, and observed the color. Next I added two drops of HCl into well D1, and then added two drops of blue dye, and recorded what I saw.
Line angle drawings are organic chemists’ shorthand for depicting chains of atoms. The ends of the lines are –CH3 groups, while the vertices along the chain are –CH2 groups. For instance, the molecule below is 2-methylnonane, C10H22: [pic] Is the line angle drawing of C10H22 below an isomer or conformer of the one above? [pic] -It is a conformer not an isomer, since the molecular formula is the same and there is no rearrangement of the atoms. Activity III Questions Name these compounds: [pic] Compound A: Trans-2-Pentene Compound B: Cis-2-Pentene Provide a proper name for the compound below: 1.
STA: SC.912.N.3.5 | SC.912.P.8.5 BLM: comprehension 56. ANS: A PTS: 1 DIF: L2 REF: p. 272 | p. 280 OBJ: 9.2.1 Apply the rules for naming and writing formulas for binary ionic compounds. | 9.3.1 Apply the rules for naming and writing formulas for binary molecular compounds. STA: SC.912.P.8.7 | SC.912.N.1.1 | SC.912.N.1.6 | SC.912.P.8.7 BLM: application 57. ANS: B PTS: 1 DIF: L2 REF: p. 276 | p. 277 | p. 278 OBJ: 9.2.2 Apply the rules for naming and writing formulas for compounds with polyatomic ions.
A) 4, 1 B) 4, 0 Ans: D C) 3, 1 D) 3, 0 11. How many C3H8O constitutional isomers are possible? A) one B) two C) three D) four Ans: C Page 2 Chem 341: Organic Chemistry, Prof. Sivaguru Jayaraman, Fall 2010. Chapter 1 Structure Determines Properties: Answers Prof. Sivaguru Jayaraman 12. Which of the following best describes the
Purpose: • To produce cis-endo-Bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic anhydride from cyclopentadiene and Malic Anhydride, using cycloaddition as the mechanism. • To find the purity using the melting point Procedure: Reference: Experiment 10.Cycloadditions: The Diels-Alder Reaction. Hart, H., Crane, L. E., Hart, D. J., and Vinod, T. K., Laboratory Manual for Organic Chemistry: A Short Course, 12th ed., Brooks/Cole, Cengage Learning: Belmont, 2007,pages 133-142. Modifications: - Maleic anhydride weighed in an Erlenmeyer flask - Warm on a hotplate - Wash product with a little ice cold ether - Dry product on large filter paper Observations: Table 1: measured values Compound/Item Measured value Maleic Anhydride 4.4917g Product 4.8398g Product melting point 123.5-141.6 oC Table 2: observed reactions Reaction Observation Warmed Maleic anhydride + ethyl acetate -Maleic anhydride (white powder) dissolved into a clear colourless liquid Adding Ligroin and cooling -Turns to a clear liquid with a white precipitate Adding Cyclopentadiene -Cloudy white liquid during mixing -settled to a bottom layer of white precipitate and a top clear colourless liquid Product White powder During melting point White powder slowly melted to clear colourless liquid Conclusion: In this experiment cis-endo-Bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic anhydride was made, and there was a final mass of 4.8398g. Also, the product was light white fluffy crystals.