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Issue 17, 2016
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Octahedral aromaticity in 2S+1A1g X6q clusters (X = Li–C and Be–Si, S = 0–3, and q = −2 to +4)

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Abstract

It is generally observed that quintessential aromatic compounds have delocalised electronic configurations that are of closed-shells or open-shells half-filled with the same spin electrons. Guided by this property, we search for aromatic octahedral clusters of the type X6q (X = Li–C and Be–Si, q = −2 to +4) in 2S+1A1g electronic states with spin multiplicities ranging from the singlet to the septet. With some exceptions, we find that closed-shells or open-shells half-filled with same spin electron systems have large multicentre indices and negative NICS values that are characteristic patterns of aromatic compounds. Our results confirm the existence of octahedral aromaticity but do not allow us to define a general rule for octahedral aromaticity because the ordering of molecular orbitals does not remain the same for different octahedral clusters.

Graphical abstract: Octahedral aromaticity in 2S+1A1g X6q clusters (X = Li–C and Be–Si, S = 0–3, and q = −2 to +4)

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Publication details

The article was received on 16 Nov 2015, accepted on 07 Dec 2015 and first published on 08 Dec 2015


Article type: Paper
DOI: 10.1039/C5CP07011B
Author version available: Download Author version (PDF)
Citation: Phys. Chem. Chem. Phys., 2016,18, 11700-11706
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    Octahedral aromaticity in 2S+1A1g X6q clusters (X = Li–C and Be–Si, S = 0–3, and q = −2 to +4)

    O. El Bakouri, M. Duran, J. Poater, F. Feixas and M. Solà, Phys. Chem. Chem. Phys., 2016, 18, 11700
    DOI: 10.1039/C5CP07011B

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