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The Dramatic Influence of Diamidoamine Ligands on the Structure and Reactivity of Low-Valent Tin and Bismuth Derivatives

✍ Scribed by Jean-Luc Fauré; Heinz Gornitzka; Régis Réau; Dietmar Stalke; Guy Bertrand

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
301 KB
Volume
1999
Category
Article
ISSN
1434-1948

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✦ Synopsis

The dilithium salts of N-methyl-NЈ,NЈЈ-bis(diisopropyl)-the hypercoordinated tin(IV) dichloride 3 (58% yield), or a transmetallation gives rise to the oniophosphane 4 (95% and -(trimethylsilyl)-diethylenetriamine 1a,b react with SnCl 2 affording the corresponding stannylenes 2a,b in 60 yield), respectively. Transmetalation reactions also occurred when 5 was treated with AlCl 3 , GaCl 3 or SnCl 2 affording the and 80% yield, respectively. Compound 1b also reacts with BiCl 3 to give the bismuth chloride 5 (90% yield). Derivatives corresponding aluminum chloride 6 (81% yield), gallium chloride 7 (38% yield) or tin dichloride 3 (38% yield). The 2b and 5 have a symmetrical bicyclic structure and are monomeric both in solution and in the solid state. When 2b observed reactivity for 2 and 5 is compared to that reported for Veith's stannylene or bismuth chloride. is treated with BiCl 3 or PCl 3 , an oxidation reaction leads to bicyclic structure. [7] This is confirmed by the presence of tin

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