A 'H NMR signal is observed at 141.0 Hz (downfield of TMS) on a 1.50 × 10²-MHz instrument. a) What is the observed chemical shift in parts per million (ppm)? Chemical shift is 0.94 ppm b) What is the chemical shift, in parts per million (ppm), if the sample is analyzed with a 500.0-MHz instrument? Chemical shift is 0.282 ppm Incorrect c) Where will the proton signal appear, in hertz, if the sample is analyzed with a 500.0-MHz instrument? The downfield signal is Hz Incorrect

A 'H NMR signal is observed at 141.0 Hz (downfield of TMS) on a 1.50 × 10²-MHz instrument. a) What is the observed chemical shift in parts per million (ppm)? Chemical shift is 0.94 ppm b) What is the chemical shift, in parts per million (ppm), if the sample is analyzed with a 500.0-MHz instrument? Chemical shift is 0.282 ppm Incorrect c) Where will the proton signal appear, in hertz, if the sample is analyzed with a 500.0-MHz instrument? The downfield signal is Hz Incorrect

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL4: Proton (1h) Nmr Spectroscopy

Section: Chapter Questions

Problem 8E

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