Trispyrazolylborate - Wikipedia
from two tris(pyrazolyl)borate ..
[(Tp(2py))Re(CO)(3)], based on the related ligand hydrotris[3-(2-pyridyl)pyrazol-1-yl]borate, has a similar fac-(CO)(3)(pyrazolyl)(2) coordination geometry.
Tris pyrazolyl borate synthesis essay | A.P.E.X
[Ni(Tp(3py)),] is monomeric, with an octahedral coordination geometry arising from two tris(pyrazolyl)borate chelates; the array of pendant 3-pyridyl groups is involved only in intramolecular hydrogen-bonding.
Potassium tris(3,5-dimethyl-1-pyrazolyl)borate - Wikipedia
In this paper we report the synthesis of new tris(carbene)borate ligands, including ligands based on benzimidazol-2-ylidene and 1,3,4-triazol-2-ylidene donors. Studies of monodentate NHC ligands have shown that the donor strength of these ligands decreases according to the order: imidazol-2-ylidene > benzimidazol-2-ylidene > 1,3,4-triazol-2-ylidene () The donor properties of the new tris(carbene)borate ligands have been evaluated in four-coordinate 10 complexes, allowing their donor properties to be compared with other monoanionic facially coordinating ligands. A number of proposals regarding the nature of bonding between Ni and NO in complexes of this type have been put forth, with the most comprehensive investigation describing the electronic structure as having multireference character; the dominant contributor being Ni(II) (SNi = 1) antiferromagnetically coupled to NO− (SNO = 1).
Forshaw, A.P.; Smith, J.M.; Ozarowski, A.; Krzystek, J.; Smirnov, D.; Zvyagin, S.A.; Harris, T.D.; Kuranadasa, H.I.; Zadrozny, J.M.; Schnegg, A.; Holldack, K.; Jackson, T.A; Alamiri, A.; Barnes, D.M.; Telser, J. “Low-Spin Hexa-Coordinate Mn(III): Synthesis and Spectroscopic Investigation of Homoleptic Tris(pyrazolyl)borate and Tris(carbene)borate Complexes” Inorg. Chem. 2013, 52, 144-159.