Reaction of tert-butylchloride with the stannole dianion first and simply prepared by the reduction of 1, 1, 2, 3, 4, 5-hexaphenylstannole with lithium in ether gave 1-tert-butylstannole anion which was characterized by 1 H, 13 C, 119 Sn, and 7 Li NMR spectra and whose reactivities were investigated.