A Disilene Base Adduct with a Dative Si-Si Single Bond.
Angew Chem Int Ed Engl
; 55(5): 1782-6, 2016 Jan 26.
Article
em En
| MEDLINE
| ID: mdl-26696311
ABSTRACT
An experimental and theoretical study of the base-stabilized disilene 1 is reported, which forms at low temperatures in the disproportionation reaction of Si2 Cl6 or neo-Si5 Cl12 with equimolar amounts of NMe2 Et. Single-crystal X-ray diffraction and quantum-chemical bonding analysis disclose an unprecedented structure in silicon chemistry featuring a dative SiâSi single bond between two silylene moieties, Me2 EtNâSiCl2 âSi(SiCl3 )2 . The central ambiphilic SiCl2 group is linked by dative bonds to the amine donor and the bis(trichlorosilyl)silylene acceptor, which leads to push-pull stabilization. Based on experimental and theoretical examinations a formation mechanism is presented that involves an autocatalytic reaction of the intermediately formed anion Si(SiCl3 )3 (-) with neo-Si5 Cl12 to yield 1.
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MEDLINE
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En
Ano de publicação:
2016
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Article