An azonia derivative of hexahelicene.
In 8a-azonia[6]helicene hexafluorophosphate or 8a-azoniaphenanthro[3,4-c]phenanthrene hexafluorophosphate, C(25)H(16)N(+) x PF(6)(-), replacement of an outer bridgehead carbon of hexahelicene by a quaternary Nsp(2) atom results in a geometrical change in the helical structure. The racemic heterohelicene forms homochiral columnar stacks through intermolecular pi-pi donor-acceptor interactions in the crystalline state.
Sato
Kiyoshi
K
Department of Applied Chemistry, Graduate School of Engineering, Tokyo Metropolitan University, 1-1 Minami-ohsawa, Hachioji, Tokyo 192-0397, Japan. sato-kiyoshi@c.metro-u.ac.jp
Arai
Sadao
S
Yamagishi
Takamichi
T
Tanase
Tomoaki
T