Question

Lab is Infrared Spectroscopy and Functional Groupd Identification a) A compound that has a strong, sharp...

Lab is Infrared Spectroscopy and Functional Groupd Identification

a) A compound that has a strong, sharp absorption bands at 1710cm-1 and a broadband at 3350cm-1. Will this be an acid always and if so what acid?

b) A compound has no absorption at 1710cm-1, but a broad band at 3350cm-1. Would this be alcohol and any particular alcohol if so?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

a) A compound that has strong, sharp absorption bands at 1710 cm-1 and a broadband at 3350 cm-1 indicates presence of carboxylic acid. See any C=C stretch is present at 1600 cm-1 and aromatic ring virbration at 1500 cm-1. These aromatic ring vibrations present it is a aromatic acid.

b) A broad band at 3350 cm-1 indicates presence of alcohol group. See phenolic stretch at 1250 cm-1. Phenolic stretch is present it is a phenol derivative or 1050 cm-1 C-O stretch is present. It is a saturated alcohol.

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
For Polarimetry and Infrared Spectrometry in chemistry lab, please answer the following: a. If a bond...
For Polarimetry and Infrared Spectrometry in chemistry lab, please answer the following: a. If a bond stretches in the forest, and the dipole moment doesn't change, does it make an absorption? b. A sample gives strong peaks at both 3300 and 1750. What kind of compound might it be? Would it make a difference whether the peak at 3300 is described as very broad or just broad? c. Someone said that IRs of aromatic compounds are "more spiky" than those...
the IR Spectra of butyric acid and ethyl butyrate show sharp strong singlet absorption at 1725...
the IR Spectra of butyric acid and ethyl butyrate show sharp strong singlet absorption at 1725 cm-1 and 1740 cm-1 respectivity by constrast, the IR spectrum of butyric anhydride shows a broad, sharp doublet at 1750 cm-1 and 1825 cm-1why these so different
Infrared Spectroscopy may be used to identify certain functional groups in organic molecules. Two of the...
Infrared Spectroscopy may be used to identify certain functional groups in organic molecules. Two of the most important are -OH stretch vibrations and C=O stretch vibrations. Match each of the functional groups below to the appropriate wavenumber range for absorption bands in IR spectra. C=O stretch modes Answer 1 Choose... 2850-3000 cm-1 / 1600-1800 cm-1 / 3040-3140 cm-1 / 1070-1150 cm-1 / 3000-3500 cm-1 -CH stretch modes in alkenes Answer 2 Choose... 2850-3000 cm-1 / 1600-1800 cm-1 / 3040-3140 cm-1...
A compound has an IR absorption band near 1700 cm-1, 1H NMR signal between 9 and...
A compound has an IR absorption band near 1700 cm-1, 1H NMR signal between 9 and 10 δ, and a 13C NMR signal near 200 δ . What is this compound most likely? Carboxylic acid, ketone, alcohol, or aldehyde.?   
1. The combination of infrared (IR) and Raman spectroscopies constitutes the field of vibrational spectroscopy, which...
1. The combination of infrared (IR) and Raman spectroscopies constitutes the field of vibrational spectroscopy, which is a powerful tool in analyzing molecular structure. Let us consider the vibrational spectroscopy of XY2. Let us propose that there are four candidate structures for XY2. I. Bent, with X central, but the X-Y bonds of different length (Cs symmetry); II. Bent, symmetric, with X central (C2v symmetry); III Linear, with X central (D∞h); IV. Linear with Y central (C∞v).        In each...
organic chemistry unsaturation tests We did a lab for functional group analysis and I missed the...
organic chemistry unsaturation tests We did a lab for functional group analysis and I missed the lab but stil need to complete the report. i do not understand it and we have a quiz on it tonight so if anyone could help that would be amazing we did 1) bromine unsaturation test 2) Baeyer unsaturation test 3) tollens reagant test for aldehydes 4) chromic acid test for aldehydes 5) idoform test for carbonyls we test butanol with chromic acid and...
Post-lab questions: 1. Benzene, which freezes at 5.50 oC, has a Kf value of 5.10 oCkg/mol....
Post-lab questions: 1. Benzene, which freezes at 5.50 oC, has a Kf value of 5.10 oCkg/mol. How does this compare to that of t-butyl alcohol determined in this lab? 2. Would more or less solute be required to cause the same temperature change observed in this lab if the solvent were benzene? 3. If 0.10 mole of a nonelectrolyte solute were added to 50.0 g of benzene, what would the freezing point of the solution be? 4. How would the...
I have provided the information for the lab below. I want to see the chemical reactions...
I have provided the information for the lab below. I want to see the chemical reactions that take place during each step of the experiment. So in the procedures when a chemical was added i would like to see what the products and byproducts that were formed. I also want to see one over all reaction for this experiment to just get an overview of what exactly is happening during the experiment. Thank you:) Part B: Synthesis of [Co(NH3)5Cl]Cl2 Objective:...
Mr. H reports that the sharp pain started about 2 days ago and it has gotten...
Mr. H reports that the sharp pain started about 2 days ago and it has gotten so bad that he cannot lie down. He rates the pain as an 8 on a scale of 1 to 10, and it radiates to his neck and back. It is much worse when he takes a deep breath, but leaning forward seems to help him. He is on lisinopril for his high blood pressure and denies any other health problems. Family history is...
Alkene Hydration LAB 3.    Choose the starting materials: styrene, and water, which is the solvent. 4.    Return to...
Alkene Hydration LAB 3.    Choose the starting materials: styrene, and water, which is the solvent. 4.    Return to the lab and build the experiment apparatus, which includes a heater, condenser, nitrogen gas. 5.    Add the reagent, sulfuric acid (H2SO4) to the reaction flask. 6.    You will monitor the reaction progress using the pull down TV and TLC. QUESTION 1 The product produce when styrene is reacted with sulfuric acid in the presence of water is a. benzoic acid b. phenol c. 1-phenylethanol d. 2-phenolethanol...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT