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Important steric effects resulting from the additional substituent at boron within scorpionate complexes containing ?3-NNH coordination modes

journal contribution
posted on 2023-06-10, 01:36 authored by Nikolaos Tsoureas, Rebecca F Hope, Mairi F Haddow, Gareth R Owen
The complexes [Ru(Tai)H(PPh3)2] (4) [Tai = HB(7-azaindolyl)3] and [Ru(ArBai)H(PPh3) 2] [ArBai = Ar(H)B(7-azaindolyl)2; Ar = phenyl (5), mesityl (6) and 2-naphthyl (7)] have been prepared and fully characterised. Structural characterisation of complexes 4, 5 and 7 confirmed the expected ?3-NNH coordination mode of the azaindolyl-based ligands. In all complexes, the borohydride unit is located trans to the hydrido ligand, and the two triphenylphosphane ligands occupy sites trans to the two nitrogen donors. The strong Ru?H-B interaction means that the third substituent at the boron atom is held in close proximity to the ruthenium centre. In the case of complex 7, rotation of the naphthyl group about the boron centre is hindered by the triphenylphosphane substituents. The synthesis of a number of ruthenium hydride complexes containing azaindole-based scorpionate ligands is reportedherein. The scorpionate ligands bind to the metal centre with ?3-NNH coordination modes. The strong borohydride?metal interaction pulls the additional substituent at the boron atom towards the bulky triphenylphosphane ligands.

History

Publication status

  • Published

File Version

  • Published version

Journal

European Journal of Inorganic Chemistry

ISSN

1434-1948

Publisher

Wiley

Issue

34

Volume

2011

Page range

5233-5241

Department affiliated with

  • Chemistry Publications

Full text available

  • No

Peer reviewed?

  • Yes

Legacy Posted Date

2021-11-01

First Compliant Deposit (FCD) Date

2021-10-30

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