Bonding in diborane-metal complexes: a quantum-chemical and experimental study of complexes featuring early and late transition metals
The coordination chemistry of the doubly base-stabilised diborane(4), [HB(hpp)]2 (hpp=1,3,4,6,7,8-hexahydro-2H-pyrimido-[1,2-a]pyrimidinate), was extended by the synthesis of new late transition-metal complexes containing CuI and RhI fragments. A detailed experimental study was conducted and quantum...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
April 9, 2013
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| In: |
Chemistry - a European journal
Year: 2013, Jahrgang: 19, Heft: 23, Pages: 7395-7409 |
| ISSN: | 1521-3765 |
| DOI: | 10.1002/chem.201300348 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/chem.201300348 Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/chem.201300348 
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| Verfasserangaben: | Arne Wagner, Elisabeth Kaifer, and Hans-Jörg Himmel |
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| 245 | 1 | 0 | |a Bonding in diborane-metal complexes |b a quantum-chemical and experimental study of complexes featuring early and late transition metals |c Arne Wagner, Elisabeth Kaifer, and Hans-Jörg Himmel |
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| 520 | |a The coordination chemistry of the doubly base-stabilised diborane(4), [HB(hpp)]2 (hpp=1,3,4,6,7,8-hexahydro-2H-pyrimido-[1,2-a]pyrimidinate), was extended by the synthesis of new late transition-metal complexes containing CuI and RhI fragments. A detailed experimental study was conducted and quantum-chemical calculations on the metal-ligand bonding interactions for [HB(hpp)]2 complexes of Group 6, 9, 11 and 12 metals revealed the dominant BHM interactions in the case of early transition-metal fragments, whereas the BBM bonding prevails in the case of the late d-block compounds. These findings support the experimental results as reflected by the IR and NMR spectroscopic parameters of the investigated compounds. DFT calculations on [MeB(hpp)]2 and model reactions between [B2H4⋅2NMe3] and [Rh(μ-Cl)(C2H4)2] showed that the bicyclic guanidinate allows in principle for an oxidative addition of the BB bond. However, the formation of σ-complexes is thermodynamically favoured. The results point to the selective BH or BB bond-activation of diborane compounds by complexation, depending on the chosen transition-metal fragment. | ||
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