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Organic Chemistry

the solubility of silver phosphate in pure water and Na3PO4

Silver Phosphate, Ag3PO4, is an ionic compound with a solubility product constant Ksp of 206 x 10 ^ - 18. Calculate the solubility of this compound in: a) pure water b) 0.2 mol L-1 or 0.2 M Na3PO4 I was able to solve part a, I got the solubility of silver phosphate in water to be 1.76 x 10 ^ -5 M. I am not sure how

Organic Chemistry

1. Draw structural diagrams and give the names for the isomers of pentane. 2. When 2-butene reacts with hydrogen chloride gas, only one product is detected, whereas when 1-butene reacts similarly, two products are usually found. Explain this. 3. Geometric isomers exist in the alkenes but not in the alkynes. Explain why.

NMR Tree Diagram

In this problem the H NMR spectrum of styrene oxide shows that protons 1, 2, and 3 all have different chemical shift values. Proton 2 is coupled to both proton 1 (J= 5.8 Hz) and proton 3 (J=2.5 Hz). Draw a scale tree diagram and your best rendering of the resulting peaks for proton 2. See attached file for full problem desc

Crystallization of Sulfanilamide

We are performing an experiment involving the crystallization of sulfanilamide using 95% ethyl alcohol as the solvent. I am having trouble creating a hypothesis and I wanted your help on creating one. The graph attached on the scan will help.

Assign formal charges to each atom

Assign formal charges to each atom in the attached file. Cross out the configurations that are not reasonable, and provide an explanation (eg large charge, incomplete octet, octet exceeded).

Using the Hückel rule for aromaticity

On the basis of the Hückel rule for aromaticity, decide whether each of the attached compounds is aromatic or not, and state why. Note: If you have the correct answer but the wrong reason, you will get no credit.

Organic Chemistry and E and Z

2. Develop a four point argument to predict whether O or N is thermodynamically more basic in the following structure (See attachment for structural formula) 3. Predict whether the E or Z will be produced by E2 elimination for the following structure (1-bromo-1,2 -diphenylpropane). Use wedge and dashed line of Newman or sawho

Matching Structures to Descriptions

See the attached file. Match a structure from the attachment to: a. an octapeptide with a C-terminal valine. b. an amino acid in its zqitterionic form. c. a polypeptide which gives four fragments on treatment with chymotrypsin d. the product of an edman degradation e. a carboxyl-protected amino acid. f. a peptid

Organic Chemistry Problems: Compound Relationships

What is the correct structure for D-glucopyranose? What is the relationship between the following compounds? a) anomers b) meso compounds c) enantiomers d) equivalent structures What is the relationship between the following compounds ? a) anomers b) meso compounds c) enantiomers d) equivalent structures

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?