Indian Forest Service (Mains), Chemistry optional · 2023 · Paper II
Q7(g). Chemical-shift separation in Hz
Question
Two signals are at 4.3 and 5.7 ppm in a 400-MHz proton spectrum. Find their separation in Hz.
Answer in brief
The frequency separation is 560 Hz.
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Coverschemical shiftppm to Hz conversion400 MHz NMRproton NMRspectrometer frequency
All parts of Question 7
- 7(a) Photochemistry of a rigid aryl ketone5 marks
- 7(b) Sequential anionic polymerization5 marks
- 7(c) Neoprene and chloroprene5 marks
- 7(d) Why polymers have average molar masses5 marks
- 7(e) Two unsaturated ester isomers5 marks
- 7(f) Sanger determination of the N terminus5 marks
- 7(g) Chemical-shift separation in Hz5 marks
- 7(h) Hydration of phenylacetylene5 marks