Syntheses,Crystal Structure and Reactivity of Tin(II) Bis[N‐(diphenylphosphanyl)(2‐pyridylmethyl)amide] |
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| Authors: | Dirk Olbert Alexander Kalisch Helmar Görls Irina Malkin Ondik Markus Reiher Prof Dr Matthias Westerhausen Prof Dr |
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| Institution: | 1. Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universit?t Jena, August‐Bebel‐Str. 2, 07743 Jena, Germany, Fax: +49‐3641‐948110;2. Laboratorium für Physikalische Chemie, ETH Zurich, H?nggerberg Campus, Wolfgang‐Pauli‐Str. 10, 8093 Zurich, Switzerland, Fax: +41‐44‐63‐31594 |
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| Abstract: | Metallation of N‐(diphenylphosphanyl)(2‐pyridylmethyl)amine with n‐butyllithium in toluene yields lithium N‐(diphenylphosphanyl)(2‐pyridylmethyl)amide ( 1 ), which crystallizes as a tetramer. Transamination of N‐(diphenylphosphanyl)(2‐pyridylmethyl)amine with an equimolar amount of SnN(SiMe3)2]2 leads to the formation of monomeric bis(trimethylsilyl)amido tin(II) N‐(diphenylphosphanyl)(2‐pyridylmethyl)amide ( 2 ). The addition of another equivalent of N‐(diphenylphosphanyl)(2‐pyridylmethyl)amine gives homoleptic tin(II) bisN‐(diphenylphosphanyl)(2‐pyridylmethyl)amide] ( 3 ). In these complexes the N‐(diphenylphosphanyl)(2‐pyridylmethyl)amido groups act as bidentate bases through the nitrogen bases. At elevated temperatures HN(SiMe3)2 is liberated from bis(trimethylsilyl)amido tin(II) N‐(diphenylphosphanyl)(2‐pyridylmethyl)amide ( 2 ) yielding mononuclear tin(II) 1,2‐dipyridyl‐1,2‐bis(diphenylphosphanylamido)ethane ( 4 ) through a C–C coupling reaction. The three‐coordinate tin(II) atoms of 2 and 4 adopt trigonal pyramidal coordination spheres. |
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| Keywords: | Lithium Tin C– C coupling Metalation Transaminations |
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