Nitronyl nitroxide derivatives showing hydrogen-bonded structures in the solid state have been prepared and characterized. In the complex of p-hydroxyphenyl nitronyl nitroxide with 1,2-Bis(diphenylphosphinoyl,)ethane (1), water molecules are bridging the two organic components, forming a hetero-chain structure. 3,5-Dimethyl-4-hydroxyphenyl nitronyl nitroxide (2) and pyridone-substituted nitronyl nitroxide (3) were also prepared and shown to have 1-D hydrogen-bonded chains. The magnetic properties of these complexes are also discussed.