Share
Explore BrainMass

Organic Chemistry Bonding

Metals Covalently Bonded to Benzene

I've noticed that my book does not mention metals as a possible substituent for mono-substituted benzenes, but it doesn't begin to explain why. Also I have had trouble finding reasons why online. Specifically I am interested to know why you don't see metals bonded to benzene with a covalent sigma bond. I am not interested in

Analysis of KH / KD and Mechanism Predictions, Chirality and Prochirality

1. Label all prochiral hydrogens (including Re and Si faces) in R-2,4-dimethyl-3-heptanone. 2. Consider the asymmetric deuteration shown below. a. To which face of the prochiral double bond did the deuteriums add to? b. Assign configurations to all chiral centers in the molecule. c. Assign E/Z configuration to the starting

Twelve problems relating to conjugation, dienes and aromaticity.

Please see the attached file for the completely formatted problems. 1. Circle any conjugated portions in the molecule below. 2. Consider the reaction below to answer the following questions: 3. The nucleophile in this reaction is __________. 4. The electrophile in this reaction is __________. 5. The product that r

Organic chemistry ACQ questions

The questions involve ordering the answer either from lower to higher acidity or basicity include the nucleophilic and electrophilec site of actions.

Catalyst to Reduce Cure Temperature in Bonding Wood with MDI

I have a wood chemistry course that indicates that methylene diphenylisocyanate (MDI) is used as a common resin and/or glue in bonding wood fibers together in composite type substrates. The cure temperature is given as approximately 425 degrees F. I have a test question that asks us to hypothesize about a chemical additive to

Precipitation of inorganic (metals) in a water treatment system?

Please help and explain to me clearly......a wastewater contains various cations such as Na, K, Mg, Ca, Ba, Fe, Cu, Zn, and Al; the pH of the wastewater is approx. 6.0 To that wastewater is added H3PO4 (phosphoric acid) in an approximate dose of .00034 gals of H3PO4 per gallon of wastewater. I'm less concerned about the st

Boiling Points

4. The atmospheric pressure in La Grande (683 atmospheric pressure) is significantly lower than that of Portland (760 normal pressure). How would the boiling points of a liquid compare in these two locations? Why? 5. Explain and illustrate why ethanol (molar mass 46g) has a higher boiling point than diethylether (molar mass 74g

combustion, dehydration and oxidation of alcohols

1. Write equations for the combustion, dehydration and oxidation of these alcohols and give the group names of the products. a. C3H7OH b. CH3CHOHCH3 c. (CH3)2COHCH3 2. a. What is the general formula for Alkynes? b. If an alkyne is progressively hydrogenated by an addition process, what is the final product of the process? Us

H NMR and C NMR

In this problem the tertiary alcohol below was subjected to dehydration with phosphorous oxychloride. The potential products are shown below. The product was isolated and purified by distillation. An NMR of the major product exhibited two triplets only, one centered at 2.1δ and the other at 0.9δ . Indicate the prod

H NMR and C NMR

Each word document contains one problem. I need the structures that go along with each spectrum. See attached file for full problem description. 1. Near the peaks the numbers are given, which are the integrations, give the number of protons. Please give a structure for the formula C8H8O, which is consistent with the H NM

Water and Oil

1. Describe the physical properties of oil and water. Discuss why they do not mix. 2. Describe the chemical composition of crude oil and how your simulation mimics an oil spill. 3. Describe at least 4 methods that could be used to attempt to separate the oil and water at home. Based on the four methods postulate which me

Stereochemistry of the Addition of Bromine to Trans-Cinnamic Acid

The question is attached and here are the Directions: Based on the mechanism present, predict the product of this reaction. Highlight the Br-C-C-Br dihedral angle. Is the diehdral angle (0 degrees for sin addition or 180 degrees for anti addition)? Look at the dihedral angle between the phenyl ring and the carboxylic

Strain or Steric energy

Please draw the structures neatly and clearly and follow directions. If you have a Chem drawing program (i.e. ChemDraw, Chem3D), I will increase the credit, if not please draw them out by hand. Strain or Steric energy (a) Choose an alkene having cis and trans isomers and draw one of these (give name of alkene also).

Resonance structures and bond lengths and types in molecules

(See attached file for full problem description) a. The structure of 1,3-butadiene is usually written as H2C==CH--CH==CH2. The average bond lengths given are: C--C of 154pm and C==C of 133pm. Explain the fact that the observed value of the distance between the two central carbon atoms in 1,3-butadiene is 146pm. b. Which

Reduction of Carvone

In the reduction of a carvone can you effectively form an isomer when C=O is reduced?

Identifying Organic Compounds

A colorless liquid A (C3H6O) was soluble in water and ether, and had a boiling point of 94-96 degrees Celsius. It decolorized a Br2-CH2Cl2 solution and gave a positive ceric nitrate test. On catalytic hydrogenation it formed Compound B (C3H8O), which did not decolorized the above bromine solution, but did give a positive ceric n

Determining Molecules from Spectral Diagrams

Compound S (C8H16) decolorizes a solution of bromine in carbon tetrachloride. The broadband proton-decoupled 13^C spectrum of S is given in Fig. 9.52. Propose a structure for S. I have attached the actual question from the book as it has Fig. 9.52 in it. There was minor blurring near the end of the chart so just for refere

Assorted State Change Questions

1 Describe the intermolecular force that must be overcome in converting each of the following from a liquid to a gas: A. Liquid O2 B. Mercury C. CH3I (methyl iodide) D. CH3CH2OH (ethanol) 2 Rank the following in order of increasing strength of intermolecular forces in the pure substances. Which do you think

Ceric Nitrate, Beyer, and Tollens Tests

I need some help in finding out what the compounds are from the scenarios: 1. A colorless liquid A (C3H6O) was soluble in water and ether, and had a boiling point of 94-96 degrees C. it decolorized a Br2-CH2Cl2 solution and gave a positive ceric nitrate test. On catalytic hydrogenation it formed Compound B (C3H8O), which

Chemical Differences Among Carbohydrates

1) How can you distinguish chemically between starch and three other carbohydrates (sucrose, glucose, & lactose)? 2) What would you expect to observe when adding one drop of iodine-potassium iodine reagent to each of the four carbohydrates? 3) How does Benedict's Reagent distinguish between carbohydrates? 4) When addi

Which of the following is an INCORRECT description of benzene?

Which of the following is an INCORRECT description of benzene? a. The CCC bond angles are all equal to 120 o b. The 6-membered ring contains alternating double and single carbon-carbon bonds c. The molecule may be drawn as resonance hybrid of 2 Kekule structures d. The molecule is planar Which of the followi

Chemical structures, hydrocarbons, and solubility

What is the structure for hexadecanol? What would explain why it is a solid rather than a liquid? How are ethanol, 1-octanol, propane-1,2,3-triol, and hexadecanol similar to their corresponding hydrocarbons (ethane, octane, propane, & hexadecane)? Do some of these alcohols possess more hydrocarbon character than other

Organic Oxygen Compounds

Can an ether molecule be made out of a methanol or ethanol molecule? Why or why not? What is the structure for 1-Octanol & Propane-1,2,3-triol? How would Ethanol, 1-Octanol, & Propane-1,2,3-triol compare in viscosity (ability to flow)? Why? Do their size, shape, or molecular structure affect their physical consistency

Organic Chemistry

(See attached file for full problem description) 5. Propose a mechanism to account for the following conversion of testoterone to the alkene shown 6 Two compounds (A and B) have formulas C3H8O. They gave the following results with three chemical tests. Propose structures for A and B consistent with this informaion. 7. A

Naming Compounds

Is the following the correct structural formula for trans-3,4-dimethyl-3-hexene? CH3 CH3 | / CH3-CH-C=C | CH3 C2H5

Aromatic structures, and mass spec, molecular ion, realtive abundances

1.(refering to dexchlorpheniramine, pilocarpine, and 9-aminoacridine)--GO TO WWW.CHEMFINDER.COM TO LOOK UP STRUCTURES FOR THESE COMPOUNDS)-- For each ring in each structure, indicate if it is aromatic. Rationalize your decision for each ring (even those that are not aromatic). Make sure to indicate which (if any) lone pair el