Acta Cryst. (2009). E65, m643-m644  [ doi:10.1107/S1600536809017152 ]

Bis[tris(3-tert-butyl-5-methylpyrazol-1-yl)hydridoborato]ytterbium(II) toluene solvate

K. O. Saliu, J. Takats and M. J. Ferguson

Abstract: In the title compound, [Yb(C₂₄H₄₀BN₆)₂]·C₇H₈, the Yb atom is coordinated by two tris(3-tert-butyl-5-methylpyrazol-1-yl)hydridoborate [Tp^tBu,Me] ligands. One ligand binds in the ³ mode, throuh three N atoms of the pyrazolyl rings, the other ligand coordinates through two N atoms of the pyrazolyl rings and the H atom attached to the central B via an agostic-type interaction through the B-H group of the second Tp^tBu,Me ligand, giving an overall distorted octahedral geometry. One of the tert-butyl groups is disordered over two sites, with occupancies of 0.65 and 0.35.

Online 14 May 2009

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