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Methine carbons, attached proton test

The other experiment worth mentioning, which, by the way, is also obsolete, is the attached proton test or APT. This experiment is based on the different magnitudes of Tl—13C coupling for methine, methylene, and methyl groups. By adjusting certain delays in the pulse sequence (not given), quaternary and methylene carbons could be phased up, and methine and methyl carbons could be phased down. Since phase is arbitrary, this order could be reversed. This ability of distinguishing... [Pg.215]

See other pages where Methine carbons, attached proton test is mentioned: [Pg.157]    [Pg.29]    [Pg.33]    [Pg.75]    [Pg.329]    [Pg.469]    [Pg.61]    [Pg.469]    [Pg.540]    [Pg.333]    [Pg.354]    [Pg.11]    [Pg.526]    [Pg.67]   


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Carbon attached proton test

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Methine protons

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