inorganics Article (2-Pyridyloxy)silanes as Ligands in Transition Metal Coordination Chemistry Lisa Ehrlich 1, Robert Gericke 1 , Erica Brendler 2 and Jörg Wagler 1,* 1 Institut für Anorganische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany;
[email protected] (L.E.);
[email protected] (R.G.) 2 Institut für Analytische Chemie, TU Bergakademie Freiberg, D-09596 Freiberg, Germany;
[email protected] * Correspondence:
[email protected]; Tel.: +49-3731-39-4343 Received: 29 September 2018; Accepted: 26 October 2018; Published: 31 October 2018 Abstract: Proceeding our initial studies of compounds with formally dative TM!Si bonds (TM = Ni, Pd, Pt), which feature a paddlewheel arrangement of four (N,S) or (N,N) bridging ligands around the TM–Si axis, the current study shows that the (N,O)-bidentate ligand 2-pyridyloxy (pyO) is also capable of bridging systems with TM!Si bonds (shown for TM = Pd, Cu). Reactions of MeSi(pyO)3 with [PdCl2(NCMe)2] and CuCl afforded the compounds MeSi(µ-pyO)4PdCl (1) and MeSi(µ-pyO)3CuCl (2), respectively. In the latter case, some crystals of the Cu(II) compound MeSi(µ-pyO)4CuCl (3) were obtained as a byproduct. Analogous reactions of Si(pyO)4, in the presence of HpyO, with [PdCl2(NCMe)2] and CuCl2, afforded the compounds [(HpyO)Si(µ-pyO)4PdCl]Cl (4), (HpyO)2Si[(µ-pyO)2PdCl2]2 (5), and (HpyO)2Si[(µ-pyO)2CuCl2]2 (6), respectively. Compounds 1–6 and the starting silanes MeSi(pyO)3 and Si(pyO)4 were characterized by single-crystal X-ray diffraction analyses and, with exception of the paramagnetic compounds 3 and 6, with NMR spectroscopy.