CRC 1349/1: Fluorinated Aluminum Compounds as Lewis-Acids for the Activation of Small Molecules (SP B04)

In the subproject B4|Braun/Riedel small molecules such as HSiEt3, HGeEt3 or H2, and FSiEt3, FGeEt3, HF or F2 will be activated at the nanoscopic aluminum chloro fluoride ACF (AlClxF3-x, x = 0,05-0,30) as well as at molecular aluminum pentafluoroorthotellurates (aluminum teflates). The activated molecules will subsequently be transferred to unsaturated compounds such as olefins and alkynes. In particular, the character of the interactions of the hydrogen or fluorine atoms with the Lewis-acidic centres of ACF and molecular aluminum teflates will be evaluated and correlated with the activity and reactivity of the compounds. The interactions with the molecular aluminum teflates will contribute to an understanding of the interactions with the amorphous ACF.

Principal Investigators
Braun, Thomas Prof. Dr. (Details) (Inorganic Chemistry)

Duration of Project
Start date: 01/2019
End date: 12/2022

Research Areas
Anorganische Chemie

M. Kervarec, C. P. Marshall, T. Braun, E. Kemnitz, J. Fluorine Chem. 2019, 221, 61-65.
"Selective dehydrofluorination of 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) to 2-chloro-3,3,3-trifluoropropene (HFO-1233xf) using nanoscopic aluminium fluoride catalysts at mild conditions"

C. P. Marshall, G. Scholz, T. Braun, E. Kemnitz, Dalton Trans. 2019, 48, 6834-6845.
"Nb-doped variants of high surface aluminium fluoride: a very strong bi-acidic solid catalyst"

Last updated on 2021-28-04 at 10:02