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- Title
Synthesis, Reactivity and Coordination Chemistry of Group 9 PBP Boryl Pincer Complexes: [(PBP)M(PMe 3) n ] (M = Co, Rh, Ir; n = 1, 2).
- Authors
Rutz, Philipp M.; Grunenberg, Jörg; Kleeberg, Christian
- Abstract
The unsymmetrical diborane(4) derivative [(d(CH2P(iPr)2)abB)–Bpin] (1) proved to be a versatile PBP boryl pincer ligand precursor for Co(I) (2a, 4a), Rh(I) (2–3b) and Ir(I/III) (2–3c, 5–6c) complexes, in particular of the types [(d(CH2P(iPr)2)abB)M(PMe3)2] (2a–c) and [(d(CH2P(iPr)2)abB)M–PMe3] (2b–c). Whilst similar complexes have been obtained before, for the first time, the coordination chemistry of a homologous series of PBP pincer complexes, in particular the interconversion of the five- and four-coordinate complexes 2a–c/3a–c, was studied in detail. For Co, instead of the mono phosphine complex 2a, the dinitrogen complex [(d(CH2P(iPr)2)abB)Co(N2)(PMe3)] (4a) is formed spontaneously upon PMe3 abstraction from 2a in the presence of N2. All complexes were comprehensively characterised spectroscopically in solution via multinuclear (VT-)NMR spectroscopy and structurally in the solid state through single-crystal X-ray diffraction. The unique properties of the PBP ligand with respect to its coordination chemical properties are addressed.
- Subjects
COORDINATE covalent bond; REACTIVITY (Chemistry); FUNCTIONAL groups; CHEMICAL properties; NUCLEAR magnetic resonance spectroscopy; COBALT; RHODIUM compounds
- Publication
Molecules, 2023, Vol 28, Issue 17, p6191
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules28176191