Explore BrainMass

Organic Chemistry Bonding


1. An energy maximum in a reaction-energy diagram would be labeled as which of the following? a. Reactant b. Product c. Transition State d. Intermediate 2. Which of the following best describes the shape of the methyl free radical? a. linear b, planar c, tetrahedral d. pyramidal

5 Chemistry Problems on alkanes

1. Which of the following correctly lists the following isomeric alkanes in order of increasing boiling point? n-hexane, 2,3-dimethylbutane, 2-methylpentane a. n-hexane < 2-methylpentane < 2,3- dimethylbutane b. 2-methylpentane < 2,3-dimethylbutane < n-hexane c. 2,3-dimethylbutane < 2-methylpentane < n-hexane d. n-hexa

Assorted Chemistry Problems

1. Draw the structure of bicyclo [3.2.0] heptane. 2. Consider the following compounds: CH3-CH2-CH2-CH2-CH3 CH3-CH2-CH2-NH-CH3 CH3-CH2CH2-CH2OH Predict their relative boiling points (rank from low (1) to (3)). Explain answer in terms of the intermolecular forces involved. 3. Draw a three-dimensional structure of CH3C

Academic Approach to Chemistry

1. The C-O-C bond angle (degees) in the compound CH3-O-CH3 is closest to a. 90 b. 109 c. 120 d. 180 2. Which of the following molecules would be expected to be MOST water soluble? a. CH3-CH2-CH2-CH2-CH3 b. CH3-CH2-O-CH2-CH3 c. HOCH2-CH2-CH2OH d. ClCH2-CH2-CH2Cl 3. The relationship between CH3CH2OH and HOCH2C

Organic Chemistry Bonding Elemental Analysis

1. A sample of unknown Y is subjected to elemental analysis. The following percentages by weight are found to be: C 40.0% H 6.7% O remainder of % by weight The molar mass is found to be 60.0 g A. Calculate the empirical formula (show work) B. What is the molecular formula of unknown Y. (Include r

Organic Chemistry

Organic chemistry structural problem with for Methyl Ketone: In organic chemistry, there is a ketone structure that has the carbon bonded twice with the oxygen(C=O)with two components on the side...the question is how or where do I attach the methyl(CH3) on to this Ketone structure? (See attachment for diagram)

Groups on a benzene ring

What determines whether a group on a benzene ring will be activating or deactivating and ortho para or meta directing?

Drawing the Structure of a Compound

1. Draw the structure of Compound A based on its formula and proton NMR. The integration of the peaks from left to right is 5:2:1. Compound A, MF C7H8O 2. Draw the structure of Compound B. Hint: The IR spectrum shows a strong bond at 1725 cm^-1. 3. Draw the structure of Compound C. Hint: The IR spectrum shows no peaks nea

Material purified from safflower oil

Provide me with your exact logic used to get the answer. A mysterious material was purified from safflower oil (hint: full of fatty acids). Upon ozonolysis it gave the following compounds in their respective molar ratios. Draw the structure of the mysterious material and give me its common name. 3 moles CHOCH2CHO 1 mol

PH and Biochemistry

I need some help to get me started: Determine the weight in grams of sodium dihydrogen phosphate (M.W.138.01) and disodium hydrogen phosphate (M.W 141.98) needed to prepare 1L of a standard buffer at pH 7.00, with a total phosphate concentration of 0.100M. Okay I know that the pKa is going to be 6.86. I am therefore going

Deduce the structure and give the name.

I am pretty sure that I have figured out the problem, just one peice is stumping me. Do you think that you can help me figure out the structure and name. What I have may possibly be right. Question: Analyze the data given in each of the problems below, deduce the structure and give the name. A fishy-smelling liquid with

Methylated lidocaine

Lidocaine is thought to bind to receptors in its methylated form. identify in writting the atoms or groups in the compound that could be involved in its binding to a receptor via- hydrogen bonding (1 example) an ionic interaction give the 2 types of functional groups that need to be present in the receptor s

Hydrolysis of Lidocaine

Draw the abbreviated structural formula of the products of the complete hydrolysis of lidocain. Identify any new functional groups naming them clearly.

MS Spectrum and NMR Spectra

1. The presence of nitrogen in an MS spectrum produces an odd numbered molecular ion. Indicate which of these four spectra shows presence of sulfur, chlorine, bromine, iodine or nitrogen in the molecule. Suggest a molecular formula for the nitrogen-containing compound. You may indicate the relevant fragments on the spectrum. Ple

Name the organic molecule using IUPAC rules

In the attached file is the structure of the organic molecule you need to name for this assignment. Your task is to name the given organic molecule using IUPAC (International Union of Pure and Applied Chemistry) rules. Please make sure you answer the all of the following: -What is the parent chain? -How do you indicate

Compound Naming: Aliphatic Hydrocarbon

Attached is the IR, NMR and Mass spec of a compound included is the formula molecular weight. Write a structure consistent with the data and draw a molecular ion. I have circled the OH Peak.

Bromination of trans-cinnamic acid

I recently did an experiment where the addition of bromine to trans-cinnamic acid gives a dibromide with two stereocenters (chiral centers). Thus, there were four stereoisomers possible (see figures on page 136 on attachment). According to the melting points of my product, I ended up with the racemic mixture (2R,3S) and (2S,