Nucleic Acid NMR. Scalar J coupling constants through hydrogen bonds. 3hJ(NCO).

Through Hydrogen Bond ^3hJ_N,CO

A cross-hydrogen bond ^3hJ_N,CO coupling constant in N-H....O=C spin systems of around 0.18-0.26 Hz. ( 00JB279) from a quantitative-J_NCO 2D H(N)CO experiment.