Abstract

The relative signs of the coupling constants in CH 3 15 NH 2 and 13CH 3 15NH 2 have been determined by double resonance— 1H { 15N} and 1H{ 13C} in the liquid phase, and 1H { 15N} and 1H{ 1H} in the gas phase. The reduced constants, J ij y iy j , for all five observable couplings are found to be of the same sign.

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