Minimalistic Ditopic Ligands: An α‐S,N‐Donor‐Substituted Alkyne as Effective Intermetallic Conjugation Linker |
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| Authors: | Julia Rüger Christopher Timmermann Dr Alexander Villinger Alexander Hinz Dr Dirk Hollmann Prof?Dr Wolfram W Seidel |
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| Institution: | 1. Institut für Chemie, Universit?t Rostock, Rostock, Germany;2. Leibniz-Institut für Katalyse e.V., Rostock, Germany |
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| Abstract: | The capability of donor‐substituted alkynes to link different metal ions in a side‐on carbon donor‐chelate coordination mode is extended from the donor centers S and P to the second period element N. The complex Tp′W(CO)2{η2‐C2(S)(NHBn)}] (Tp′=hydrido‐tris(3,5‐dimethylpyrazolyl)borate, Bn=benzyl) bearing a terminal sulfur atom and a secondary amine substituent is accessible by a metal‐template synthesis. Subsequent deprotonation allowed the formation of remarkably stable heterobimetallic complexes with the (η5‐C5H5)Ru(PPh3)] and the Ir(ppy)2] moiety. Electrochemical and spectroscopic investigations (cyclic voltammetry, IR, UV/Vis, luminescence, EPR), as well as DFT calculations, and X‐ray structure determinations of the W–Ru complex in two oxidation states reveal a strong metal–metal coupling but also a limited delocalization of excited states. |
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| Keywords: | alkynes heterometallic complexes ligand design metal– metal interactions template synthesis |
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