Blinn College Molecules Chemicals Discussion

Author an outline of how to identify each of the molecules above in about 3-6 sentences. Be specific in what you would look for in each spectrum to distinguish the unlabeled chemicals and also how each spectrum would provide support for each identification. Also, identify anything that would stop you from making a unique, positive identification of any of the chemicals. You may also use your knowledge of other tests or chemistries to help ID these chemicals

Aromatic aldehyde

Provide an identification scheme for an aromatic aldehyde

• Include a brief outline of how you would identify an aromatic aldehyde.
• You may also use your knowledge of other tests or chemistries to help identify an aromatic aldehyde.
• Also, identify anything that would stop you from making a unique, positive identification of an aromatic aldehyde and differentiating it from the other 7 molecules

Ketone

Provide an identification scheme for a ketone

• Include a brief outline of how you would identify a ketone.
• You may also use your knowledge of other tests or chemistries to help identify a ketone.
• Also, identify anything that would stop you from making a unique, positive identification of a ketone and differentiating it from the other 7 molecules.

Two Alcohols

Provide an identification scheme for an alcohol

• Include a brief outline of how you would identify an alcohol.
• You may also use your knowledge of other tests or chemistries to help identify an alcohol.
• Also, identify anything that would stop you from making a unique, positive identification of each alcohol and differentiating it from the other 7 molecules, in particular differentiating the two alcohols with missing labels.

Carboxylic acid

Provide an identification scheme for a carboxylic acid

• Include a brief outline of how you would identify a carboxylic acid.
• You may also use your knowledge of other tests or chemistries to help identify a carboxylic acid.
• Also, identify anything that would stop you from making a unique, positive identification of a carboxylic acid and differentiating it from the other 7 molecules.

Two Alkenes

Provide an identification scheme for an alkene

• Include a brief outline of how you would identify an alkene.
• You may also use your knowledge of other tests or chemistries to help identify an alkene.
• Also, identify anything that would stop you from making a unique, positive identification of an alkene and differentiating it from the other 7 molecules, in particular differentiating the two alkenes with missing labels.

Alkane

Provide an identification scheme for an alkane

• Include a brief outline of how you would identify an alkane.
• You may also use your knowledge of other tests or chemistries to help identify an alkane.
• Also, identify anything that would stop you from making a unique, positive identification of each alkene and differentiating it from the other 7, in particular differentiating the two alkenes with missing labels.

Please view the attached missing label spectrum and match it to each unlabeled chemical.

For each chemical, Complete the provided table with 3 Major IR peaks, Explain why the spectra belongs with the chemical and answer the following question “Did the spectra you picked match your initial description?”

Post lab questions:

1. Were there any compounds that you could not positively ID based on the materials and instruments you had available to you? Explain if needed.

2. A Bunsen burner was available, explain how it did or did not help with identification.

3. Explain your thoughts on whether or not using solely IR is a good method to make positive IDs of chemicals.

4. How would you use IR to distinguish between liquid bromine (Br2) and gaseous hydrogen bromide (HBr)? Explain.

5. What, if any, precautions must you take when using salt plates for IR sample preparations?

6. Does water solubility help in your identification scheme? Explain.

7. One of Christina’s other employees allowed water to get into another chemical bottle containing an alkyne. Would this error affect the IR spectrum and ultimately the ID of the chemical? Explain.

8. A common experiment in organic chemistry labs involvs the dehydration of cyclohexanol (an alcohol) to form cyclohexene. Would infrared spectroscopy help determine if your reaction was successful? Explain.