118688-62-3Relevant academic research and scientific papers
New Trigonal Lattice Hosts: Stoicheiometric Crystal Inclusions of Laterally Trisubstituted Benzenes - X-Ray Crystal Structure of 1,3,5-Tris-(4-carboxyphenyl)benzene*Dimethylformamide
Weber, Edwin,Hecker, Manfred,Koepp, Erich,Orlia, Wolfgang,Czugler, Matyas,Csoeregh, Ingeborg
, p. 1251 - 1258 (2007/10/02)
New host molecules with a central 1,3,5-trisubstituted benzene ring and rigidly attached lateral arms composed of aryl or arylethynyl and extra fuctional groups are reported.They are shown to give more than thirty clathrates with a wide variety of organic solvents comprising alicyclic, aromatic, heterocyclic, dipolar aprotic, and protic molecules.Inclusion selectivities and stoicheiometries of the different clathrates are discussed.The crystal structure of (2a)*dimethylformamide (DMF) (1:3) inclusion compound has been determined from single-crystal X-ray diffraction.The crystals show R3 symmetry.There are six host and eighteen guest molecules in the hexagonal unit cell with a=b=23.160(9) and c=11.812(3) Angstroem.The final linear R is 0.082 for 1518 unique reflections.The host molecule adopts a propeller conformation with perfect three-fold symmetry and acts as a donor in hydrogen bonds to three DMF molecules.In the crystal structure the host-guest units are arranged stack-wise.
