Publisher: John Wiley & Sons Inc
E-ISSN: 1521-3765|20|30|9221-9224
ISSN: 0947-6539
Source: CHEMISTRY - A EUROPEAN JOURNAL, Vol.20, Iss.30, 2014-07, pp. : 9221-9224
Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.
Abstract
AbstractIn the presence of a Lewis acid or base, cyclotrisilene cSi3Tip4 (Tip=2,4,6‐triisopropylphenyl) reacts with CO to form stable adducts of a 1,3‐disila‐2‐oxyallyl zwitterion. Coordination of an N‐heterocyclic carbene (NHC) to one silicon center results in a localized SiC bond, whereas B(C6F5)3 bonds to the carbonyl moiety leading to the delocalization of the positive charge over the oxyallyl moiety. Computational analysis of the electronic structure of the Lewis acid adduct reveals a considerable interaction between the two silicon atoms in 1,3‐position and thus aromaticity akin to the homocyclopropenium cation.
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