In a 360-MHz spectrometer, the protons in iodomethane absorb at a position 650 Hzdownfield from TMS.(a) What is the chemical shift of these protons?(b) What is the chemical shift of the iodomethane protons in a 60-MHz spectrometer?(c) How many hertz downfield from TMS would they absorb at 60 MHz?

In a 360-MHz spectrometer, the protons in iodomethane absorb at a position 650 Hzdownfield from TMS.(a) What is the chemical shift of these protons?(b) What is the chemical shift of the iodomethane protons in a 60-MHz spectrometer?(c) How many hertz downfield from TMS would they absorb at 60 MHz?

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter13: Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Section13.12: Dept 13c Nmr Spectroscopy

Problem 21P

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Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.

Question

In a 360-MHz spectrometer, the protons in iodomethane absorb at a position 650 Hz
downfield from TMS.
(a) What is the chemical shift of these protons?
(b) What is the chemical shift of the iodomethane protons in a 60-MHz spectrometer?
(c) How many hertz downfield from TMS would they absorb at 60 MHz?

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