All-metal σ-antiaromaticity in dimeric cluster anion {[CuGe9Mes]2}4−†
Zi-Chuan
Wang, 
‡a
Nikolay V.
Tkachenko,
‡b
Lei
Qiao,
a
Eduard
Matito,
cd
Alvaro
Muñoz-Castro,
e
Alexander I.
Boldyrev
*b
and
Zhong-Ming
Sun
*a
‡a
Nikolay V.
Tkachenko,
‡b
Lei
Qiao,
a
Eduard
Matito,
cd
Alvaro
Muñoz-Castro,
e
Alexander I.
Boldyrev
*b
and
Zhong-Ming
Sun
*a
Abstract
In this work, we report a dimeric cluster anion, {[CuGe9Mes]2}4−, which was isolated as the [K(2,2,2-crypt)]+ salt and characterized by using single-crystal X-ray diffraction and ESI mass spectroscopy. The title cluster represents the first locally σ-antiaromatic compound in the solid state, as well as the first heteroatomic antiaromatic compound.
![Graphical abstract: All-metal σ-antiaromaticity in dimeric cluster anion {[CuGe9Mes]2}4−](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=D0CC02525A&imageInfo.ImageIdentifier.Year=2020)
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