Isolation and low-temperature x-ray analysis of intramolecular triarylmethane-triarylmethylium complex: preference for a C-H-bridged unsymmetric structure exhibiting a facile 1,5-hydride shift and charge-transfer interaction.
The intramolecular triarylmethane-methylium complex with an averaged C2v-symmetry was successfully generated by N-methylation of the acridine-acridan hybrid. Theoretical calculation and VT-NMR analyses in solution indicate the unsymmetric geometry for the three-center bond, which was finally confirmed crystallographically. Significant degree of CT interaction is induced through the very short C-H...C+ contact.
Kawai
Hidetoshi
H
Division of Chemistry, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan.
Takeda
Takashi
T
Fujiwara
Kenshu
K
Suzuki
Takanori
T