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Synthesis and Structure of [Tp*Rh{P(C7H7)3}] – Competition between the Ligands Tris(3,5-dimethyl-1-pyrazolyl)borate (Tp*) and Tris(1-cyclohepta-2,4,6-trienyl)phosphane. Proof of the κ2(N,B–H) Coordination Mode of the Tp* Ligand

✍ Scribed by Max Herberhold; Stefan Eibl; Wolfgang Milius; Bernd Wrackmeyer

Publisher
John Wiley and Sons
Year
2000
Tongue
German
Weight
107 KB
Volume
626
Category
Article
ISSN
0372-7874

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✦ Synopsis

Stepwise introduction of the potential tripod ligands tris(3,5-dimethyl-1-pyrazolyl)borate (Tp*) and tris(1cyclohepta-2,4,6-trienyl)phosphane into the coordination sphere of rhodium(I) leads mainly to [Tp*Rh{P(C 7 H 7 ) 3 }] (4), in which Tp* is linked to the rhodium through a single pyrazolyl group and a non-linear B±H±Rh bridge. This is the novel, now firmly established coordination mode j 2 (N,B±H). The phosphane ligand is coordinated through one Rh±P and two Rh-olefin bonds. Important structural features determined for the crystalline state of 4 are retained in solution, as shown by the 1 H, 11 B, 13 C, 31 P and 103 Rh NMR spectra.

📜 SIMILAR VOLUMES

Molecular Structures of Mononuclear Rhod
Molecular Structures of Mononuclear Rhodium Complexes Containing the Polydentate Ligand Tri(1-cyclohepta-2,4,6-trienyl)phosphane, P(C7H7)3. Classification according to the 31P Chemical Shifts
✍ Max Herberhold; Wolfgang Milius; Stefan Eibl 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 German ⚖ 123 KB 👁 1 views

The olefinic phosphane P(C 7 H 7 ) 3 (5) behaves as a tetradentate tripod ligand in [RhCl{P(g 2 -C 7 H 7 ) 3 }] (6), using all 3 cyclohepta-2,4,6-trienyl substituents as g 2 -coordinating side-arms. Nucleophilic displacement of the one-electron chloro ligand by halides or pseudohalides to give [RhX{