Syntheses and Crystal Structures of Ammoniates with the Phenyl‐Substituted Polytin Anions Sn2Ph$\rm{_{\bf 4}^{{\bf 2} - } }$, cyclo‐Sn4Ph$\rm{_{\bf 4}^{{\bf 4} - } }$, and Sn6Ph$\rm{_{{\bf 12}}^{{\bf 2} - } }$ |
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Authors: | Katharina Wiesler Christof Suchentrunk Nikolaus Korber |
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Abstract: | The reaction of diphenyltin dichloride with the binary Zintl phase K4Sn9 in the presence of excess lithium and 18‐crown‐6 in liquid ammonia led to the ammoniate K(18‐crown‐6)(NH3)2]2Sn2Ph4 ( 1 ). The analogous reaction with K4Ge9 and potassium in the absence of further alkali metal ligands resulted in the compound K2(NH3)12]Sn6Ph12 ? 4 NH3 ( 3 ). Cs6Sn4Ph4](NH2)2 ? 8 NH3 ( 2 ) was prepared by reacting diphenyltin dichloride with a surplus of caesium in liquid ammonia. The low‐temperature single‐crystal structure determinations show all compounds to contain phenyl‐substituted polyanions of tin. Compound 1 is built from Sn2Ph anions consisting of Sn dumbbells with two Ph substituents at each Sn‐atom. Compound 2 contains cyclo‐Sn4Ph anions formed by a four‐membered tin ring in butterfly conformation with one Ph substituent at each Sn‐atom in an (all‐trans)‐configuration. Sn6Ph in 3 is a zig‐zag Sn6 chain with two substituents at each of the Sn‐atoms. Both 1 and 3 have molecular counter cations, in the latter case the unprecedented dinuclear potassiumammine complex K2(NH3)12]2+ is observed. Compound 2 shows a complicated three‐dimensional network of Cs? Sn interactions. |
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Keywords: | Zintl anions Ammine complexes Polytin anions Ammoniates X‐Ray crystallography |
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