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Research

Eine neue Glovebox von GS
Foto: Gunnar Werncke
Our newest permanent member.

Quasilinear, monovalent 3d-transition metal complexes are a fascinating class of molecules, that combine an uncommon coordination geometry with an for a 3d-transition metal unusual oxidation state. The isolation of such complexes, which are only known for some years, relied so far on the use of sterically demanding and/or electronically stabilising ligands. We could already show the possibility, to obtain such compounds (Cr - Co) using a ligand set (–N(SiMe3)3-), that usually does not necessarily enforce this coordination geometry. This lead to surprisingly stable yet highly reactive compounds with intriguing properties.

We are now examining in how far the motif of an anionic two-coordinate metal(I) ion can be also be achievied using ligands with even less steric encumbrance or other donor atoms. By this we want to understand the behaviour of such low-coordinate metal(I) concerning their physical properties and their reactivity towards bonds and small molecules. With these compounds in hand we use them as a synthetic platform to approach a variety of questions in molecular coordination, organometallic and bioinorganic chemistry.

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For these studies we use a variety of analytic techniques that are available either "in-house" or with the help of cooperation partners (paramagnetic NMR, EPR, 57Fe-Mössbauer- and UV/Vis spectroscopy; mass spectrometry; magnetic measurements using dc- and ac-SQUID; quantum chemical calculations).