The single crystal structure of an organic tetracation: Tetrakis(4-dimethylaminopyridinium)-p-benzoquinone tetrakis(triflate)
作者:Hans Bock、Sabine Nick、Jan W. Bats
DOI:10.1016/s0040-4039(00)61094-8
日期:1992.9
The structure of the dark red title salt shows a distorted planar quinone ring with CC bonds of 133, 147 and 153 pm length and distorted pyridine rings twisted by 56° or 63° with ipso angles of 116°; it can be largely rationalized both by structurecomparison with other p-benzoquinone derivatives or pyridinium salts and by MNDO calculations, which suggest that an extensive delocalization of the four