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Magnetic coupling coefficients Knm where n ≠ m. Values of Knm for unique parallel and perpendicular orientations were calculated from the measured isolated and coupled-pair resonances. A descent algorithm was used to adjust Knm to minimize the RMSPE between the observed and predicted coupled modes. Couplings between coil pairs highlighted in blue were held fixed. Couplings between 13C and 1H coils required the largest adjustments (from 0.176 to 0.111) with a change of 59%.
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