Explore BrainMass

Molecules, Compounds, etc.

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

Please see the attached file for full problem description.

18. Identify the functional groups in morphine and Demerol. Can these molecules be assigned to a particular class of compound? Why or why not?

21. Why of these compounds can exist in chiral forms?
a. H C - C - CH
5 2 I 3

b. H C - C - COOH
3 I

c, H C - C - H
5 6 I

23. Molecules as diverse as cholesterol, sex hormones, and cortisone all contain common structural elements. Write the structural formula that represents the common structural elements.

27. Carbon usually forms four covalent bonds, nitrogen usually forms three bonds, oxygen usually forms two bonds, and hydrogen can only form one bond. Use this information to write structural formulas for each of these compounds.

a. A compound that contains one carbon atom, one nitrogen atom, and as many hydrogen atoms as needed.
b. A compound that contains one carbon atom, one oxygen atom, and as many hydrogen atoms as needed.

29. Styrene, C H CH==CH is another compound that contains a ring similar to
6 5 2
Benzene, C H
6 6.
One hydrogen has been replaced by the side chain ----CH==CH
Write a set of structural formulas for styrene to show that this molecule, like benzene, also has resonance structures.

35. Vitamin E is often sold as a racemic mixture of D- and L-isomers.

a. Which is the more physiologically active isomer?
b. How does the cost of the racemic mixture compare with the price of the pure, physiologically active isomer?

© BrainMass Inc. brainmass.com October 24, 2018, 5:33 pm ad1c9bdddf


Solution Summary

The solution is attached in 450-515 words and includes explanations and diagrams.

See Also This Related BrainMass Solution

Compounds & Structural Formulas, etc.

Please see the attached file for full problem description.

A popular brand of low-fat shredded cheddar cheese advertises that it provides 1.5 g of fat with 15 Calories from total fat per serving. There are 50 Calories per serving and of the total fat, 1.0 g is saturated fat. A serving is defined as ¼ cup or 28 g. Is this "low-fat" cheese? Defend your decision with some calculations. Remember that the dietary recommendation is that no more than 30 % of Calories should come from fat.

15. Fructose, C6H12O6, is a carbohydrate.
a. Rewrite the formula for fructose to emphasize the original meaning of the term "carbohydrate."
b. Write a structural formula for one of the isomers of fructose.
c. Do you expect the different isomers of fructose to all have the same sweetness? Explain why or why not.

4. Write the structural formula for each different isomer of hexane, C6H14. Hint: Be sure the bonding really is different, not just a different paper-and-pencil representation in two dimensions of the same structure.

6. For each compound, identify each functional group present and name the class of compounds to which it belongs.

a. CH _ O - CH
3 3

b. CH CH - C - OH
3 2
c. CH CH - C - CH
3 2 3

d. CH CH - C - NH
3 2 2

9. Histamine causes runny noses, red eyes, and other symptoms in hay fever sufferers. Here is the structural formula for histamine:

N - C - C -----/
/ I I ---N

a. What is the molecular formula of this compound?
b. Identify the amine functional group in histamine.
c. Which part (or parts) of the molecule do you think make the compund water soluble?

View Full Posting Details