Crystalline Na-Si(NN)derivatives [Si(NN)=Si{(NCH_2tBu)_2C_6H_4-1,2}]:the silylenoid [Si(NN)OMe]~-,the dianion [(NN)Si-Si(NN)]~(2-),and the radical anion c-[Si(NN)]_3~-

摘要

Reactions of the silylene Si[(NCH_2Bu~t)_2C_6H_4-1,2],[Si(NN)],with NaOMe,excess Na or 1/3 Na yield the X-ray-characterised crystalline compounds [Na{mu-Si(NN)OMe}-(THF)(OEt_2)]_2(2b),[Na(THF)_2Si(NN)]_2,(3)and [Na(THF)_4][{Si(NN)}_3-c](4).We wish to report the isolation of the remarkable X-ray-characterised crystalline compounds 2-4,derived from the thermally stable bis(amino)silylene Si[(NCH_2tBu)_2C_6H_4-l,2](1)[abbreviated as Si(NN)].