# First examples of stable transition metal complexes of an all-metal antiaromatic molecule (Al$_4$Li$_4$)

Authors
Type
Preprint
Publication Date
Sep 20, 2004
Submission Date
Sep 20, 2004
Identifiers
arXiv ID: cond-mat/0409508
Source
arXiv
We propose new methodologies for stabilizing all-metal antiaromatic clusters like: Al$_{4}$Li$_{4}$. We demonstrate that these all-metal species can be stabilized by complexation with 3d-transition metals very similar to its organic counterpart, C$_4$H$_4$. Complexation to transition metal ions reduce the frontier orbital energies and introduces aromaticity. We consider a series of such complexes [$\eta$$^4(Al_4Li_4)-Fe(CO)_3, \eta$$^2$$\sigma$$^2$(Al$_4$Li$_4$)-Ni and (Al$_{4}$Li$_{4}$)$_{2}$Ni] and make a comparison between the all-metal species and the organometallic compounds to prove conclusively our theory. Fragmentation energy analysis as well as NICS support similar mechanism of complexation induced stability in these all-metal molecules.