Hideki Wasa

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Helicenes are ortho-annelated polycyclic aromatic molecules with nonplanar helical conjugation of the p-electron system. These aromatic molecules have attracted special attention not only because of the nonplanarity of the p-conjugated skeleton but also because of their inherent helical chirality. Recent developments in helicene chemistry have focused on(More)
Radically active: A redox-active air-stable neutral π radical (1(·)) with three dicyanomethylene groups introduced with threefold symmetry into a triangulene π skeleton instead of the oxygen atoms of TOT(·) was designed, synthesized, and characterized (see figure). The enhanced electron-accepting ability and extended π-electronic system of this chemical(More)
A triangulene-based C2-symmetric 33 π-conjugated stable neutral π-radical, 2(·), which possesses two dicyanomethylene groups and one oxo group, has been designed, synthesized, and isolated as an analogue of tris(dicyanomethylene) derivative 1(·) and trioxo derivative TOT(·) with C3 symmetry. Effects of molecular-symmetry reduction and electron-accepting(More)
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