The synthesis of perfluoro-1,6-disubstituted triptycenes containing group IV and group V elements
作者:N.A.A. Al-Jabar、A.G. Massey
DOI:10.1016/0022-328x(85)80068-1
日期:1985.5
The step-wise syntheses, starting from 1,2-dibromotetrafluorobenzene, of eight fully-fluorinated 1,6-disubstituted triptycenes is described. In each case the intermediate tris(2-bromotetrafluorophenyl) compounds were isolated and characterized.
Molecular structures of the 1,6-disubstituted triptycenes Sb<sub>2</sub>(C<sub>6</sub>F<sub>4</sub>)<sub>3</sub>and Bi<sub>2</sub>(C<sub>6</sub>F<sub>4</sub>)<sub>3</sub>using gas-phase electron diffraction and ab initio and DFT calculations
作者:Derek A. Wann、Sarah L. Hinchley、Heather E. Robertson、Nahalah A. A. Al-Jabar、Alan G. Massey、David W. H. Rankin
DOI:10.1039/b514063c
日期:——
The structures of the D3h-symmetric molecules dodecafluoro-1,6-distibatriptycene and dodecafluoro-1,6-dibismatriptycene [Z2(C6F4)3 (Z = Sb, Bi)] have been determined in the gas phase by electron diffraction, using the SARACEN method, with restraints obtained from quantum chemical calculations. Several methods of ab initio and density functional theory geometry calculations have been performed and recommendations made as to their relative suitabilities for determining the structures of such species. Calculations using the MP2 method with a small-core pseudopotential (aug-cc-pVQZ-PP) on the Sb and Bi atoms and the 6-311G* basis set on the light atoms were found to give the closest correlation with the experimental results for both molecules. Differences in structure were found depending on whether a large-core or small-core pseudopotential was used on the heavy atoms.