Bis[hydrotris(4-chloro-3,5-dimethylpyrazolyl)borato]nickel(II)
by Desrochers, P. J.; Brown, J. R.; Arvin, M. E.; Jones, G. D.; Vicic, D. A.
The title compound, [Ni(C15H19BCl3N6)(2)] or Ni(Tp*(Cl))(2), adds to the list of structurally characterized bis(trispyrazolyl) borate-nickel(II) complexes. The two facially coordinating N-donor Tp*(Cl) ligands impose pseudo-octahedral coordination on the nickel(II) center. The asymmetric unit consists of two half molecules, primarily differing in the torsion angles of the coordinated pyrazole rings relative to the central B-Ni-B axis of the molecules; each molecule is centrosymmetric. An average overall Ni-N distance of 2.104 (15) angstrom is observed, typical of octahedral NiN6 coordination spheres and this class of compound. The title compound readily forms good quality crystals, while its 4-H analog, Ni(Tp*)(2), does not. This characteristic is attributed to close contacts between the pyrazole 4-chloro-substituents on adjacent molecules.
- Journal
- Acta Crystallographica Section E-Crystallographic Communications
- Volume
- 61
- Year
- 2005
- Start Page
- M1455-M1458
- URL
- https://dx.doi.org/10.1107/s160053680502012x
- ISBN/ISSN
- 2056-9890
- DOI
- 10.1107/s160053680502012x