Anion-controlled dimerized rectangular, herringbone and tape building blocks by L-shaped diamide-substituted pyridinium salts via N–H⋯O and C–H⋯O hydrogen bonding
Anion-controlled dimerized rectangular, herringbone and tape building blocks by L-shaped diamide-substituted pyridinium salts via N–H⋯O and C–H⋯O hydrogen bonding
Anion-controlled dimerized rectangular, herringbone and tape building blocks by L-shaped diamide-substituted pyridinium salts via N–H⋯O and C–H⋯O hydrogen bonding
作者:Wei-Liang Li、An-Kai Wu、Kwang-Ming Lee
DOI:10.1039/c2ce25695a
日期:——
A series of 1-(2-amino-2-oxoethyl)-4-carbamoylpyridin-1-ium salts with different anions (PF6â (1), OTfâ (2), BPh4â (3) and Brâ (4)) have been synthesized and characterized by single crystal X-ray diffraction. The results demonstrate that the unparallel diamide-substituted pyridinium salts form a dimerized rectangular building block and a 2-D rectangular structure via NâHâ¯O and CâHâ¯O hydrogen bonding (PF6â (1) and OTfâ (2), respectively), a 2-D sheet structure (BPh4â (3)) via NâHâ¯O hydrogen bonding catemers and a 2-D plate structure via NâHâ¯O and CâHâ¯O hydrogen bonding catemers (Brâ (4)). The effects on the hydrogen bonding motifs, building blocks and structures by the four anion species with different hydrogen bonding acceptor abilities, sizes and shapes have been discussed.