Isolation and Crystal Structures of Two Singlet Bis(Triarylamine) Dications with Nonquinoidal Geometries Shijun Zheng, Stephen Barlow, Chad Risko, Tiffany L. Kinnibrugh, Viktor N. Khrustalev, Simon C. Jones, Mikhail Yu. Antipin, Neil M. Tucker, Tatiana V. Timofeeva, Veaceslav Coropceanu, Jean-Luc Brédas, and Seth R. Marder J. Am. Chem. Soc.; 2006; 128(6) pp 1812 - 1817; Résumé en anglais