Why must the second I spin 90 pulse in the HSQC sequence be applied about the y-axis?

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Why must the second I spin 90° pulse in the HSQC sequence be applied about the y-axis? What would the effect be of applying this pulse about the -y-axis?

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Understanding NMR Spectroscopy

ISBN: 978-0470746080

2nd edition

Authors: James Keeler

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Question Posted: Apr 26, 2016 08:36 AM

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Why must the second I spin 90 pulse in the HSQC sequence be applied about the y-axis?

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From section 87 on page 209 the terms present after the first s...View the full answer

Understanding NMR Spectroscopy

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