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    Organic Chemistry

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    NMR and MS techniques

    What are the advantages of NMR and MS write one compound which you can identify using each of these techniques.

    Using Synthetic Division to Solve Equations

    1) Use the synthetic division to find: f(-2) f(x)= 2x^2 - 3x^2 + 7x - 12 2) For the function f(x) = -x^3 + 8x^2 - 40 Show how to use synthetic division to find out if -1 is a zero. 3) One of the zeros of the function f(x) = x^3 - 7x^2 + 17x - 15 is 2-i. Find all the other zeros 4) Use the intermediate value theor

    Amino acids, electrophoresis and isoleucine

    (See attached file for full problem descriptions) D. Assume you have a mixture of the three amino acids. Predict the electrophoresis pattern you would expect to see at pH 7.6. Explain your prediction by indicating charges expected on each amino acid at pH 7.6 3. The amino acid, isoleucine, is shown attached. Show what re

    NMR Spectrum and Reaction Mechanisms

    I need some help with these questions: A. Explain the following NMR spectrum for N,N - Dimethylformamide. At room temperature, three peaks are observed: 1. 2.9 (singlet, 3H) 2. 3.0 (singlet 3H) 2. 8.0 (singlet, 1H) As the temperature is raised, only 2 peaks are observed: 1. 2.95 (singlet, 6H) 2. 8.0 (singlet, 1H) B.

    Products of Reactions and Boiling Points

    5. Show the products of the following reagents (see attached file) with p-methylbenzoic acid. 6. Match the compounds with the following boiling points. Be sure to explain your selections in terms of intermolecular forces involved (see attached file). (See attached file for full problem description)

    Drawing, Naming, and Ranking Compounds

    A. Draw structures for the following compounds (see attached file) B. Name the following compounds (see attached file) C. Rank the following compounds in terms of increasing acidity. Explain your reasoning. (see attached file) (See attached file for full problem description)

    Convert the Diazonium Salt

    (See attached file for full problem description) p_Ethyl aniline is treated with NaNO3 in HCl to generate the diazonium salt. For the first two, show what reagents are necessary to convert the salt to the products shown below. For the third, show what product is obtained. Synthesize the following compounds using the startin

    Drawing and Identifying Amine Structures

    1. Which of the isomeric amines below has a higher boiling point? Explain your reasonsing and make a drawing to illustrate the intermolecular forces involved: (CH3 -CH2-CH2)3-N vs. CH3-(CH2)8-NH2 2. Show the reagents needed to synthesize 1-propanamine from the following: CH3CH2CHO CH3CH2CN CH3CH2CONH2 3. Name t

    Infrared Spectrum of chloroform

    The C-H stretching mode of chloroform (CHCl3) which occurs at 3022/cm, is one of the rare exceptions to the 3000/cm rule. What is the rule? Suggest an explanation for this exception.

    Unsaturated lipids in cephalin

    1. What are the ingredients of a cephalin? 2. Which fatty acid is always unsaturated in a cephalin? Why? 3. What is the enzyme system used in the formation of the prostalandins and thromboxanes? 4. Would you expect sodium ions (Na+) to be able to pass easily into a cell through bi-layer membrane wall? Why or Why not?

    Organic Chemistry: Spectroscopic and Chemical Tests

    Please answer the following questions. 1. Using sketches, demonstrate why the addition of HCN to 2-butanone yields a racemic mixture of chiral products. Circle the chiral carbon in each product. 2. Describe spectroscopic or chemical tests to distinguish between the following pairs of compounds: a. 2-pentanone vs 2-pentano

    Lipids - Methanol, Ethanol & 1-Propanol Reactions

    Methanol, Ethanol, & 1-Propanol 1) How would you sketch these three alcohol molecules? 2) What is each of their polarity? 3) What differences might you expect in the comparative solubility of each of them in lipids? WHY??? 4) If you were to add 2 drops of sheep blood to each of these alcohols (about 1/3 of a small te

    Organic Chemistry and Structural Properties

    In the mass spectrum of butylbenzene, the base peak occurs at m/z a. 134 b. 119 c. 105 d. 91 The number of mono-bromination products of p-xylene is a. 1 b. 2 c. 3 d. 4 Which of the following compounds has the lowest boiling point? a. p-dichlorobenzene b. o-dichlorobenzene c. m-

    Aromaticity and Hybridization

    I need some help with answering these questions: (See attached file for full problem description and structural formulas) 1. Predict whether the molecule would be expected to show aromatic character or not. Explain your answer. 2. What is the hybridization of the nitrogen atom in sulfathiazole? 3. Assuming that the sulfur

    Mass and Infrared Spectra for Hydrocarbons

    6. The mass spectrum and the infrared spectrum for an unknown hydrocarbon are shown below. From this information, suggest a structure for the hydrocarbon. Indicate on the spectra how your structure fits the data. (See attached file for full problem description)

    Infrared and Mass Spectroscopy

    4. Infrared Spectroscopy (a) Deduce a possible structure for the compound with the following major IR absorptions. Explain your choice based on the IR absorptions, indicating the absorptions on your molecule. C4H8O: 3000, 2850 (weak), 2715 (weak), 1730 (strong) cm^-1. (b) How could you use IR spectroscopy to distinguish betw

    Organic oxygen compounds and possible isomers for Methanol

    What are the possible isomers for Methanol, 1-Propanol, & 1-Pentanol? Are Methanol, 1-Propanol, & 1-Pentanol soluble in water and also in hexane? Why or why not? Why isn't it possible to make a ketone molecule out of a methanol or ethanol molecule? Is it because they have been oxidized?

    Identifying an unknown hydrocarbon

    Is it possible to identify what the hydrocarbon is with just knowing the volume of it (9.61 ml), the mass (7.669 g/ml), density (0.798 g/ml)? Under tensor lamp, in ambient light, and in dark light there was no color noticed. It smelled somewhat like gasoline maybe and was smoky as far as combustion characteristics. Boiling poin

    Organic Chemistry Problems - Asorption

    Absorption of UV-visible energy by a molecule results in: a. vibrational transitions b. rotational transitions c. proton flips d. electronic transitions. 2. Which of the following compounds absorbs the longest wavelength of UV-visible light? a. 2-butene b. 1,4-hexadiene c. 1,3-hexadiene

    Benzene as an Organic Solvent

    Benzene is a organic solvent with the formula, CB6BHB6B. It boils at 80.1 C and melts at 5.5 C. Benzene's density is 0.88 gm/ml, its heat of vaporization is 20.0 KJoules per mole, its heat of fusion is 10.0 KJoules per mole, its heat capacity is 0.50 KJoules per mole-degree C for liquid benzene, 0.25 KJoules per mole-degree C fo

    Isomeric Products Isolated from Free-radical Chlorination

    Some isomeric products were isolated from the free-radical chlorination of (R)-sec-butyl chloride. a) Draw stereochemical structures of the 1,2-, 2,2, and 1,3- dichlorobutanes obtained in this way. Give the proper R/S specification of 1,2 and the 1,3-dichlorobutanes. b) Which of these fractions as isolated will be optically act

    Carbohydrates with D and L Series

    Please see the attached for diagram. What is the number of carbon atom that determines whether the carbohydrate shown below belongs to the D series or to the L series? a. 1 b. 2 c. 3 d. 4 e. 5

    mutarotation of glucose

    Please see attached The fact that glucose undergoes mutarotation is best explained by a. righ flipping between nonequivalent chair conformations by the b-pyranose form. b. interconversion of the alpha and beta pyranose forms. c. interconversion of aldehyde and enol forms d. interconversion of aldehyde and ketone forms e.

    Carbohydrates and fructose

    Each of the following statements about fructose is correct except one. Which statement is incorrect? a. Fructose is a stereoisomer of glucose b. Fructose has six carbon atoms c. Fructose is a monosaccharide d. Fructose is a ketose

    Carbohydrates - glucose properties

    Each of the following statements about glucose is correct except one. Which statement is incorrect? a. Glucose is an aldose b. Glucose is a hexose c. There are 14 diastereomers of glucose (in its open-chain form). d. Glucose is a monosaccharide e. Glucose is a stereoisomer of ribose.