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The complex [Na(15-crown-5)][N(SO 2 CH 3 )2] crystallizes at —25°C from a methanol solution containing equimolar amounts of NaN(SO 2 CH 3 ) 2  and 15-crown-S. Its crystallographic data at —95°C are: monoclinic, space group P 2 1 /c, a = 852.1(5), b = 2731.9(12), c = 909.2(4) pm, β = 115.53(4)°, V = 1.910 nm 3 , Z = 4, D x  = 1.445 Mgm 3 . The structure in the solid state consists of ion pairs. The sodium cation is coordinated to the five oxygen atoms of the crown ether, one oxygen atom of the anion, and to the nitrogen atom of the anion. The bond distances are Na—O(crown) 238.7-247.2, Na—O(sulfonyl) 234.9, Na—N 275.8 pm. The sodium ion lies 78 pm out of the plane of the crown ether oxygen atoms. The conformation of the coronand is described.

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Polysulfonylamine, XLIV Synthese von [Na(15-Krone-5)][N(SO 2 CH 3 ) 2 ] und Kristallstruktur bei –95°C / Polysulfonylamines, XLIV Synthesis of [Na(15-Crown-5)][N(SO 2 CH 3 ) 2 ] and Crystal Structure at –95°C