Radical anions, stannylene

The first of these radical ions was the stannylene radical anion, [(Mc3Si)2CH]2Sn, which was obtained by the reduction of the stannylene with sodium in THF. In the ESR spectrum, it showed a broad singlet withg= 2.0177 and... 

Very interestingly, if equimolar amounts of alkali metal are used for the reduction of the aryl(chloro)stannylene, radical anions (which will be discussed later) are formed. 

Stannylene radical anions were generated in a way similar to that used for germylene radical anions (cf. equation 51). 

In a comparable way as outlined below for lead, Klinkhammer and coworkers obtained a number of oligosilanylated stannyl anions and radicals by reaction of oligosilanyl anions with diamino and diaryloxy stannylenes [246]. Scheschkewitz and coworkers found that the reaction of a disilenyl lithium species with Me2SnCl2 gave a chlorinated disilastanniranes (9) [247]. 

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