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[Question from NMRWiki Q&A forum] J-Coupling In Proton NMR

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NMR processing:

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NOEs:

Structure from NMR restraints:

Ab initio:

Fragment-based:

Rosetta-NMR (Robetta)

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GeNMR

I-TASSER

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Amber

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Preditor

TALOS

Promega- Proline

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CSI (via RCI server)

TALOS

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d2D

PECAN

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RCI

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HADDOCK

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Shiftx2

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ArShift- Aromatic

ShiftS

Proshift

PPM

CheShift-2- Cα

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Shifty

Camcoil

Poulsen_rc_CS

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MAXOCC

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Solid-state NMR:

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08-22-2010, 02:30 AM

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J-Coupling In Proton NMR

J-Coupling In Proton NMR

I'm currently a college student taking Organic Chem and I've no idea how to figure out the J-coupling for H-NMR and neither my professor/TA's/book are being helpful. Does one apply the n+1 rule first to figure the number of peaks and then apply the various couplings to each peak?

I understand that if a single H has two non-equivalent neighboring protons, you'd get a doublet of doublets instead of a triplet. But say, for example, how would I figure out the signal for the hydrogens attached to the terminal C of the double bond in 1-pentene ( the first carbon in, CH2=CHCH2CH2CH3)?

Thank you very much for your time.

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