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Dipl.-Chem. Miriam Schwab

Miriam Schwab

Room: 03 060 (FMF)

Telephone: +49 761 203-4782

e-Mail: miriam.schwab@ac.uni-freiburg.de


Keywords: Synthesis, Characterization and Application of weakly coordinating Nickel



Weakly coordinating anions (WCAs) are often used to stabilize highly reactive cations. The single negative charge of WCAs, which is delocalized over a large surface, leads to only little interactions between the anion and the associated cation. To date, an aluminate anion [Al(ORF)4] (with RF = C(CF3)3) is still one of the least coordinating anions, and can be synthesized in a multigramm-scale.[1]
Based on these premises, one part of my work is to synthesize a new perfluorinated aluminate. Our aim is to obtain a WCA, which contains perfluorinated asymmetric alkoxy units to induce a rigid orientation of the substituents around the aluminum center (Figure 1).
Figure 1: Calculated structures of perfluorinated aluminates.
Additionally I am investigating the syntheses and characteristics of new homoleptic Ni(I)-complexes (Figure 2), which are stabilized by a weakly coordinationg anion [Al(ORF)4]. Characterization of these complexes with, for instance, one unpaired electron include XRD, EPR, SQUID, CV, IR and Raman measurements.
Figure 2: left: Comparison of molecular structures of M(cod)2+-complexes (M = Rh, Ni, Ag); right: reaction of [Ni(cod)2][Al(ORF)4] with phosphines.

[1]   I. Krossing, I. Raabe, Angew. Chem. 2004, 116, 2116–2142.



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