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\begin{document}

\title{Si\textsubscript{6}C\textsubscript{18}: A Bispentalene Derivative with
Two Planar tetracoordinate Carbons}



\author[1]{Diego Inostroza}%
\author[1]{Luis Leyva-Parra}%
\author[2]{Osvaldo Yañez}%
\author[3]{J. César  Cruz}%
\author[4]{Jorge Garza-Olguin}%
\author[5]{Victor Garcia}%
\author[6]{Venkatesan Thimmakondu}%
\author[1]{William Tiznado}%
\affil[1]{Universidad Andres Bello}%
\affil[2]{Universidad de Las Américas}%
\affil[3]{Universidad Autónoma Metropolitana Iztapalapa}%
\affil[4]{Universidad Autonoma Metropolitana Iztapalapa}%
\affil[5]{Universidad Nacional Mayor de San Marcos}%
\affil[6]{San Diego State University}%


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  \date{May 22, 2024}


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\begin{abstract}
Here we show that substituting the ten protons in the dianion of a
bispentalene derivative
(C\textsubscript{18}H\textsubscript{10}\textsuperscript{2-}) by six
Si\textsuperscript{2+} dications produces a minimum energy structure
with two planar tetracoordinate carbons (ptC). In
Si\textsubscript{6}C\textsubscript{18}, the ptCs are embedded in the
terminal C\textsubscript{5} pentagonal rings and participate in a
three-center, two-electron (3c-2e) Si-ptC-Si \selectlanguage{greek}σ-\selectlanguage{english}bond. Our exploration of
the potential energy surface identifies a triphenylene derivative as the
putative global minimum. But robustness to Born-Oppenheimer molecular
dynamics (BOMD) simulations at 900 and 1500 K supports bispentalene
derivative kinetic stability. Chemical bonding analysis reveals ten
delocalized \selectlanguage{greek}π-\selectlanguage{english}bonds, which, according to H\selectlanguage{ngerman}ückel's 4n+2 \selectlanguage{greek}π-\selectlanguage{english}electron rule,
would classify it as an aromatic system. Magnetically induced current
density analysis reveals the presence of intense local paratropic
currents and a weakly global diatropic current, the latter agreeing with
the possible global aromatic character of this specie.%
\end{abstract}%



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\verb`manuscript-In-J-Q-Chem-fin.docx`  available at \url{https://authorea.com/users/486283/articles/571339-si6c18-a-bispentalene-derivative-with-two-planar-tetracoordinate-carbons}

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