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In recent years isolation and coordination chemistry of molecular tetrel(0) compounds has been realized by employing different donor ligands such as phosphines, N-heterocyclic carbenes (NHCs), and cyclic alkyl amino carbenes (CAACs).[1] In all these reported molecular tetrel(0) compounds the tetrel(0) centre has been coordinated by two or more number of donor centres.
In this talk I will discuss the synthesis of molecular Ge(0) compound I under the coordination sphere of transition metal complexes where Ge(0) centre is coordinated by only one donor, i.e. NHC. In compound I, Ge(0) centre is coordinated to a [Fe(CO)4] and a [Fe2(CO)8] moiety. This can be considered as a formally neutral iron germanide, Fe3Ge motif, which is stabilized by the coordination of an N-heterocyclic carbene to the germanium and carbon monoxide to the iron center. This is related to our previous report of an iron germanide Fe2Ge2 motif II.[2] Also we have strategically synthesized a molecular complex containing the FeGe2 motif, III. In this talk I will discuss about the systematic well defined routes for preparing compounds varying Fe(0) and Ge(0) ratios.
References:
[1] See recent review on heavier molecular tetrel(0) compounds: S. Yao, Y. Xiong, M. Driess, Acc. Chem. Res. 2017, 50, 2026–2037.
[2] A. Jana, V. Huch, H. S. Rzepa, D. Scheschkewitz, Organometallics 2015, 34, 2130–2133. |