The Role of 2,6‐Diaminopyridine Ligands in the Isolation of an Unprecedented,Low‐Valent Tin Complex |
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| Authors: | Johanna Flock Dr Amra Suljanovic Dr Ana Torvisco Dr Wolfgang Schoefberger Birgit Gerke Prof Dr Rainer Pöttgen Prof Dr Roland C Fischer Prof Dr Michaela Flock |
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| Institution: | 1. Institute of Inorganic Chemistry, Graz University of Technology, 8010 Graz (Austria), Fax: (+43)?316‐873‐32102;2. Institute of Organic Chemistry, Institute of Inorganic Chemistry, Johannes Kepler University Linz, 4040 Linz (Austria);3. Institut für Anorganische und Analytische Chemie, Westf?lische Wilhelms‐Universit?t Münster, Corrensstrasse 30, 48149 Münster (Germany) |
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| Abstract: | Stabilization of the central atom in an oxidation state of zero through coordination of neutral ligands is a common bonding motif in transition‐metal chemistry. However, the stabilization of main‐group elements in an oxidation state of zero by neutral ligands is rare. Herein, we report that the transamination reaction of the DAMPY ligand system (DAMPY=2,6‐ArNH‐CH2]2(NC5H3) (Ar=C6H3‐2,6‐iPr2)) with SnN(SiMe3)2]2 produces the DIMPYSn complex (DIMPY=(2,6‐ArN?CH]2(NC5H3)) with the Sn atom in a formal oxidation state of zero. This is the first example of a tin compound stabilized in a formal oxidation state of zero by only one donor molecule. Furthermore, three related low‐valent SnII complexes, including a DIMPYSnIICl]+SnCl3]? ion pair, a bisstannylene DAMPY{SnIIN(SiMe3)2]2}2, and the enamine complex MeDIMPYSnII, were isolated. Experimental results and the conclusions drawn are also supported by theoretical studies at the density functional level of theory and 119Sn Mössbauer spectroscopy. |
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| Keywords: | density functional calculations diaminopyridine ligands diiminopyridine ligands donor– acceptor systems Mö ssbauer spectroscopy tin |
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