1. A pair of small peaks such as these can be seen at the base of every large resonance in the spectrum (Figure 1). What are they due to? a) Poor shimming b) H-H coupling c) 13C-H coupling d) Spinning sideband 126 Hz Figure 1 Figure 2 2. The baseline in the spectrum at right looks twisted. What is this due to? a) Poor shimming b) Improper phasing c) Impure sample d) Incorrect shift reference

1. A pair of small peaks such as these can be seen at the base of every large resonance in the spectrum (Figure 1). What are they due to? a) Poor shimming b) H-H coupling c) 13C-H coupling d) Spinning sideband 126 Hz Figure 1 Figure 2 2. The baseline in the spectrum at right looks twisted. What is this due to? a) Poor shimming b) Improper phasing c) Impure sample d) Incorrect shift reference

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

ChapterL4: Proton (1h) Nmr Spectroscopy

Section: Chapter Questions

Problem 9CTQ

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