Questions: What stretching frequencies (in cm^-1) are present in the structure below?

What stretching frequencies (in cm^-1) are present in the structure below?
Transcript text: What stretching frequencies (in $\mathrm{cm}^{-1}$ ) are present in the structure below?
failed

Solution

failed
failed

Solution Steps

Step 1: Identify the functional group

The structure shows a benzene ring attached to a dimethylamino group (-N(CH3)2). The key bonds we're interested in for IR stretching frequencies are the C-H bonds (sp2 hybridized carbons in the benzene ring and sp3 hybridized carbons in the methyl groups) and the N-H bonds (although there are none in this case, this is important to distinguish).

Step 2: Analyze the C-H stretches

Aromatic C-H stretches (from the benzene ring) typically appear above 3000 cm⁻¹. Aliphatic C-H stretches (from the methyl groups) appear below 3000 cm⁻¹.

Step 3: Consider the N-H stretches

There are no N-H bonds present in the molecule, so we won't see any N-H stretches (which would normally appear around 3300-3500 cm⁻¹).

Final Answer

3100 cm⁻¹ (and other values above 3000 cm⁻¹ for aromatic C-H stretches) and values below 3000 cm⁻¹ for aliphatic C-H stretches are present. So the answer is "all of these".

Was this solution helpful?
failed
Unhelpful
failed
Helpful

Questions asked by other users

failedAnswered
Inventory which is partially complete is known as - raw materials - work in process - finished goods
failedAnswered
1.5 ÷ 0.6 =
failedAnswered
As the Board of Governors of the American Red Cross considers planning, one option is to make strategic plans and then direct managers to align tactical and operational plans accordingly. Another option is to have planning specialists help managers across the organization make their own plans. Why might this organization's executives opt for the latter approach? Check all that apply. Resources will be better coordinated across the organization in support of the overall strategy. When managers come up with their own plans, they are likely to be more committed to following through on them. The environment is a dynamic one, and department and frontline managers can come up with more responsive plans than can central leadership. Senior leadership will have more control over the organization's direction.
failedAnswered
Select the best answer for the question. 19. The production of sleeper cars and dining cars by the Pullman Car Company had a positive impact on the industry. A. finance B. oil C. railroad D. steel
failedAnswered
Read the sentence from paragraph 2. "I don't know, Bob, the theory is alt right, but how it will work out in practice is a cat of another color; one thing is sure, though, and that is if it don't work we are out of the running in the race, for the new boat the Jenkins boys have just bought, will run circles round the Sprite." What does the phrase "a cat of another color" mean in this excerpt? A. something that will not function fast enough B. something different that cannot be predicled C. something that needs more new parts to work D. something that may not work more than once