Unprecedented silicon(II)→calcium complexes with N-heterocyclic silylenes

• Verfasst von: Blom, Burgert [VerfasserIn]
• Verfasst von: Klatt, Günter [VerfasserIn]
• Verfasst von: Gallego, Daniel [VerfasserIn]
• Verfasst von: Tan, Gengwen [VerfasserIn]
• Verfasst von: Driess, Matthias [VerfasserIn]
• Titel: Unprecedented silicon(II)→calcium complexes with N-heterocyclic silylenes
• Verf.angabe: Burgert Blom, Günter Klatt, Daniel Gallego, Gengwen Tan and Matthias Driess
• Jahr: 2015
• Jahr des Originals: 2014
• Umfang: 6 S.
• Fussnoten: First published 4 November 2014 ; Gesehen am 26.05.2020
• Titel Quelle: Enthalten in: Dalton transactions
• Ort Quelle: London : Soc., 1972
• Jahr Quelle: 2015
• Band/Heft Quelle: 44(2015), 2, Seite 639-644
• ISSN Quelle: 1477-9234
• DOI: doi:10.1039/C4DT03148B
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1698834985

Abstract

The first N-heterocyclic silylene (NHSi) complexes of any s-block element to date are reported for calcium: [(η5-C5Me5)2Ca←:Si(O-C6H4-2-tBu){(NtBu)2CPh}] (6) and [(η5-C5Me5)2Ca←:Si(NtBuCH)2] (7). Complexes 6 and 7 are isolable in a facile way upon reaction of the corresponding free N-heterocyclic silylenes (NHSis) with [(η5-C5Me5)2Ca] (2). Complexes 6 and 7 were fully characterised by spectroscopic means and the single crystal X-ray diffraction analysis of 6 is also reported. Analysis of the bonding situation by DFT methods including a Bader Atoms in molecules (AIM) analysis is also reported. The bonding interaction between the Si and Ca centres in complexes 6 and 7 can best be viewed as σ-donor-acceptor interactions, with a considerable ionic contribution in the bond. The reactivity towards the oxygen containing substrates THF and benzophenone is also discussed.