Helical supramolecular assemblies of {2,4,6-[Cp*Rh(E2-1,2-C2B10H10)(NC5H4CH2S)]3(triazine)} (E = S, Se) shaped by Cp*-Toluene-Cp* pi-stacking forces and BH-pyridine hydrogen bonding.
Polycarborane-substituted molecules [Cp*Rh{E 2C 2(B 10H 10)}] 3(tpst) [E = S ( 2a), Se ( 2b)] were synthesized and characterized. 2a and 2b form toluene solvates in the solid state showing infinitely connected [( 2a, b)-(toluene)] infinity helices. The chains of these supramolecules are held together by Cp*-toluene-Cp* pi-stacking interactions of two of the three Cp* ligands of the bell-shaped 2a and 2b molecules. Unconventional BH (delta-)-pyridyl (delta+) aromatic hydrogen bonding enforces the bell-shapes of the molecular units, and the Cp* conformations are expected to induce the supramolecular structures.
Wang
Guo-Liang
GL
Shanghai Key Laboratory of Molecular Catalysis and Innovative Material Department of Chemistry, Fudan University, Shanghai, People's Republic of China.
Lin
Yue-Jian
YJ
Blacque
Olivier
O
Berke
Heinz
H
Jin
Guo-Xin
GX
D006860:Hydrogen Bonding; D008958:Models, Molecular; D008968:Molecular Conformation; D011725:Pyridines; D014050:Toluene; D014227:Triazines
D011725:Pyridines; D014227:Triazines; D014050:Toluene; C023666:pyridine