What are the IR range of O-H group?

What are the IR range of O-H group?

IR Spectrum Table by Frequency Range

What major IR stretches would you expect to see in the salicylic acid and aspirin?

What major IR stretches would your expect to see in the salicyclic acid and aspirin? A broad peak around 3500-3000. Why should no Bunsen burners be used when ether is in the lab?

What is the key difference in the IR spectra of acetylsalicylic acid and salicylic acid?

A key difference is acetylsalicylic acid shows two strong peaks in the carbonyl (C=O) stretching region (1650 – 1800 cm-1), because it has two different carbonyl groups — while salicylic acid has only one.

What is IR spectra of salicylic acid?

FT-IR spectrum of treated salicylic acid showed the upstream shifting in wavenumber of C-H stretching from 2999 to 3004 cm-1 and 2831 to 2837 cm-1 and C=O asymmetric stretching vibration from 1670 to 1683 cm-1 and 1652 to 1662 cm-1.

What functional groups are in aspirin?

There are three functional groups found in aspirin:

• Carboxylic acid consists of a carbonyl group (CO) and a hydroxyl group (OH). It’s also referred to as the R-COOH group.
• Ester consists of a carbonyl group (CO) bound to an oxygen group.
• The aromatic group (benzene) is the ring you see in aspirin.

How does infrared spectroscopy determine purity of aspirin?

Each spectrometer yields further results regarding the purity of the aspirin. NMR spectra reflect the presence of hydrogen atoms, or protons, in a substance. The two starting materials in the aspirin synthesis reaction were acetic anhydride and salicylic acid.

What is the functional group of aspirin?

The common name of aspirin is acetylsalicylic acid and its IUPAC name is 2-Acetoxybenzoic acid. Between ester and carboxylic acid functional groups the highest priority functional group is carboxylic acid. Hence, in aspirin carboxylic acid is the principal functional group.

What is the IR spectrum of aspirin?

Figure 2.2 The IR spectrum of synthesized aspirin displays two peaks in the 1650 cm (^-1) to 1850 cm (^-1) range at 1679.70 cm (^-1) and at 1749.46 cm (^-1)

What is the peak of the NMR spectrum of aspirin?

Because the NMR spectrum of the synthesized aspirin sample does not have a peak at 11.0 PPM, it can be concluded that there is no leftover acetic acid in the final product.

What is the peak of aspirin synthesis reaction?

Looking again at the starting materials of the aspirin synthesis reaction, acetic acid and salicylic acid, each compound has one peak in the 1650 to 1850 cm -1 range on their IR spectra. Acetic acid has a peak at 1704.69 cm -1 and salicylic acid has a peak at 1652.36 cm -1.

How to perform titration trials on synthesized aspirin?

To finish the experiment, three titration trials were performed using the synthesized aspirin. 0. 3 g of aspirin was weighed by difference and dissolved in 5 mL of methanol in an Erlenmeyer flask for each trial. DI water and four drops of phenolphthalein were added, and the same process of titration was used.