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posted Jun 04 '10 at 15:25

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Ligia
21

positive or negative coupling constant in NMR

When positive and negative coupling constants ocurr in NMR? and why? What are the spin state of the nucleis and the bond electrons for each situation? An alpha proton coupled to other proton decrease or increase its frequency of ressoance for a 1J, 2J and 3J?

Thank you so much

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posted Jun 05 '10 at 09:27

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Evgeny Fadeev
5471

What is the origin of positive or negative coupling constant in NMRNMR?

When positive and negative coupling constants ocurr occur in NMR? and why? What are the spin state states of the nucleis nuclei and the bond electrons for each situation? situation?

An alpha proton coupled to other proton decrease or increase its frequency of ressoance resonance for a 1J, 2J and 3J?

Thank you so much

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No.2 Revision

posted Jun 05 '10 at 09:28

Evgeny%20Fadeev's gravatar image

Evgeny Fadeev
5471

What is the origin of positive or and negative coupling constant constants in NMR?

When positive and negative coupling constants occur in NMR? and why? What are the spin states of the nuclei and the bond electrons for each situation?

An alpha proton coupled to other proton decrease or increase its frequency of resonance for a 1J, 2J and 3J?

Thank you so much

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