Spectroscopy Analyze NMR spectrum Spectroscopy Analyze NMR spectrum lab help! a.

Question

Spectroscopy Analyze NMR spectrum

Spectroscopy Analyze NMR spectrum lab help!

a. identify the IR absorptions

b. analyze NMR spectrum(chemical shift, integration multiplicity, 1H Assignment)

c. Provide stucture

and also it will be helpful if you can explain how you get it!

Please help me!

the NMR spectrum provided should be one of the samples

Possible compounds 1. 4-ethynylbenzyl acetate 2. 4-aminophenyl propionate 3. ethyl 3-(4-formylphenyl)propiolate 4. ethyl 4-aminobenzoate 5. but-3-yn-2-yl benzoate 6. 4-iodophenyl acetate 7. ethyl 4-(3-oxoprop-1-yn-1-yl)benzoate 8. 4-hydroxy-3-lodo acetophenone 4 OH

Explanation / Answer

7).

a) IR bands: C=O stretch of aldehyde =1740-1720 cm-1; C=O stretch of ester = 1750-1735 cm-1;

b) 1H NMR data: (CHO = 9.4 ppm, 1H, s); (Ar-H= 8.2 ppm, d, 2H); (Ar-H= 7.6 ppm, d, 2H); (-OCH2= 4.4 ppm, t, 2H); (-CH3= 1.4 ppm, t, 3H).

c) ethyl 4-(3-oxoprop-1-yn-1-yl) benzoate is the compound.

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.