%0 Journal Article
%T Synthesis and NMR-Study of the 2,3,4,5-Tetraethylsilole Dianion [SiC4Et4]2£¿£¿2[Li]+
%A Jang-Hwan Hong
%J Molecules
%D 2011
%I MDPI AG
%R 10.3390/molecules16098033
%X The previously unknown silole dianion [SiC4Et4]2£¿£¿2[Li]+ (3) was prepared by the sonication of 1,1-dichloro-2,3,4,5-tetraethyl-1-silacyclopentadiene [Cl2SiC4Et4, 2] with more than four equivalent of lithium in THF. 1H-, 13C-, and 29Si-NMR data of 3 are compared with those of the reported silole dianion [SiC4Ph4]2£¿. Trapping of 3 with trimethylchlorosilane gave 1,1-bis(trimethylsilyl)-2,3,4,5-tetraethyl-1-silacyclopentadiene [(Me3Si)2SiC4Et4, 4] in high yield. The silole of 2 was synthesized in high yield in three steps by a modified procedure using Cp2ZrCl2 via Cp2ZrC4Et4 and 1,4-dibromo-1,2,3,4-tetraethyl-1,3-butadiene.
%K silole
%K germole
%K dianion
%K group 14 metallole
%K aromaticity
%U http://www.mdpi.com/1420-3049/16/9/8033