| Abstract: | The Reaction of Cyanide Ions with Trimethylgallium. The Crystal Structures of Cs{CN(GaMe3)2}]n (1) and Cs(toluene)2{CN(GaMe3)2}]n (2) CsCN reacts with GaMe3 in the molar ratio of 1 : 2 in the absence of additional solvent to the metalate Cs{CN(GaMe3)2}] ( 1 ). 1 can be recrystallized from MeCN/toluene, forming Cs(toluene)2{CN(GaMe3)2}] ( 2 ). If CsCN is treated with one equivalent GaMe3 in Et2O at 20 °C, the metalate Cs(NCGaMe3)] can be isolated. 1 – 3 were characterized by NMR, IR, and MS techniques. In addition, X-ray structure analyses of 1 and 2 were prepared. According to the structural characterization 1 consists of a helix of Cs+ ions and side-on coordinated anions Me3GaCNGaMe3]–, running along 010]. π-Electron-Cs+ contacts between Cs cations and toluene molecules are dominating the structure of 2 . The residual equatorial positions at the Cs(toluene)2]+ sandwich-ion are occupied by Cs+-hydrogen(methyl) interactions. A three-dimensional network is the result of the contacts between cations and anions. |
