Unformatted text preview: τ is shorter 3) The magnitude is simply 94-73 = 11 Hz. The sign is positive. This is because one bond 1 H-15 N couplings are negative because of the negative gamma for 15 N. A decrease in splitting must come from a positive RDC (we assume all RDCs would be less than 94 Hz). 4) Scaling in solids NMR is by a factor of (1-3cos 2 θ )/2 . This factor is zero at 54.7 ° , but 0.12 at 50 ° . The line would be 24 ppms wide or 24 X 500 X 0.25 or 3000 Hz at 125 MHz for 13 C....
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- Fall '11
- Mole, Ci-1 coupling constant, respective alpha carbons