In this letter, we report that single-walled carbon nanotubes (SWNTs) can be dissolved in organic solvents through the formation of admixtures with barbituric acid-triaminopyrimidi ne (BA center dot TP) complexes using mechanochemical high-speed vibration milling (HSVM) and sonication methods. In contrast, neither BA nor TP alone were capable of solubilizing SWNTs. Moreover, the glutarimide (GI)center dot TP complex was also found to be incapable of solubilizing SWNTs because the two carbonyl groups and one imino group of GI are located on only one side of the molecule such that the GI center dot TP complex cannot form the desired hydrogen-bonding network. These results strongly suggest that the formation of a hydrogen-bonding network makes possible the formation of multipoint interactions with the surfaces of the SWNTs.