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Platinum trans-bis(borirene) complexes displaying coplanarity and communication across a platinum metal center
journal contribution
posted on 2023-06-08, 19:04 authored by Holger Braunschweig, Alexander Damme, Rian D Dewhurst, Hauke Kelch, Bret B Macha, Krzysztof Radacki, Alfredo VargasAlfredo Vargas, Qing YeAmbient-temperature photolysis of the aminoborylene complex [(OC)5Cr=B=N(SiMe3)2] in the presence of a series of trans-platinum(II) bis(alkynyl) precursors of the type trans-[Pt(CCAr)2(PEt3)2] (Ar = Ph, p-C6H4OMe, and p-C6H4CF3) successfully leads to two-fold transfer of the borylene moiety [:B=N(SiMe3)2] onto the alkyne functionalities. The alkynyl precursors and resultant platinum bis(borirene) complexes formed are of the type trans-[Pt(B{=N(SiMe3)2}C=CAr)2(PEt3)2] (Ar = Ph, p-C6H4OMe, and p-C6H4CF3). These species have all been successfully characterized by NMR, IR and UV-vis spectroscopy as well as by elemental analysis. Single-crystal X-ray diffraction has verified that these trans-bis(borirene) platinum complexes display coplanarity between the twin three-membered rings across the platinum core in the solid state and stand as the first examples of coplanar conformations of twin borirene systems. These complexes were modeled using Density Functional Theory (DFT), providing information helpful in determining the ability of the transition metal core to interact with each individual borirene ring system and allow for the observed coplanarity of these rings in the solid state. This proposed transition metal interaction with the twin borirene systems is manifested in the electronic characterization of these borirene species, which display divergent photophysical UV-vis spectroscopic profiles compared to a previously published platinum mono(borirene) complex.
History
Publication status
- Published
Journal
Chemistry - A European JournalISSN
1521-3765Publisher
WILEY-VCH Verlag GmbH & Co. KGaA, WeinheimExternal DOI
Issue
6Volume
21Page range
2377-2386Department affiliated with
- Chemistry Publications
Full text available
- No
Peer reviewed?
- Yes
Legacy Posted Date
2014-11-28Usage metrics
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