Zusammenfassung
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)](2)Sn2Ph4 (1). The analogous reaction with K4Ge9 and potassium in the absence of further alkali metal ligands resulted in the compound [K-2(NH3)(12)]Sn(6)Ph(12)(.)4 NH3 (3). Cs-6[Sn4Ph4](NH2)(2)(.)8 NH3 (2) was ...
Zusammenfassung
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)](2)Sn2Ph4 (1). The analogous reaction with K4Ge9 and potassium in the absence of further alkali metal ligands resulted in the compound [K-2(NH3)(12)]Sn(6)Ph(12)(.)4 NH3 (3). Cs-6[Sn4Ph4](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 Sn2Ph42- anions consisting of Sn dumbbells with two Ph substituents at each Sn-atom. Compound 2 contains cyclo-Sn4Ph44- anions formed by a four-membered tin ring in butterfly conformation with one Ph substituent at each Sn-atom in an (all-trans)-configuration. Sn6Ph122- in 3 is a zig-zag Sn-6 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 [K-2(NH3)(12)](2+) is observed. Compound 2 shows a complicated three-dimensional network of Cs-Sn interactions.
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