Aromatic benzannulated germole dianions. The dilithio and disodio salts of a germaindenyl dianion

被引：42

作者：

Choi, SB ^{[1
]}

Boudjouk, P ^{[1
]}

Qin, K ^{[1
]}

机构：

[1] N Dakota State Univ, Dept Chem, Ctr Main Grp Chem, Fargo, ND 58105 USA

来源：

ORGANOMETALLICS | 2000年 / 19卷 / 09期

关键词：

D O I：

10.1021/om990991t

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Conversion of the neutral 1,1-dichloro-DPGI (1) (DPGI = 2,3-diphenyl-1-germaindene) to the lithium dianion (2a) or sodium dianion (2b) leads to the highly unusual phenomenon of aromatization of the GeC4 portion of 1-germaindene at the expense of the aromatic annulated Ca ring. Treatment of 2a with trimethylchlorosilane gave the 1,1-bis(trimethylsilyl)-DPGI derivative (3) in high yield. The structure of 2a was determined by X-ray crystallography and found to possess two eta(5)-coordinated lithium ions. The five-membered ring of the germaindenyl system undergoes significant carbon-carbon bond equalization upon formation of the dianion, while the remaining four carbon atoms become diene-like, exhibiting two short bonds separated by a long bond.

引用

页码：1806 / 1809

页数：4

共 11 条

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