Ruthenium Tris(pyrazolyl)borate Complexes

We have also prepared a new tris(imidazolium)phenylborane dication starting from 1-methylcyclohexylimidazole, namely PhB(CyCH2ImH)3OTf26. This salt was prepared by the same method used for the synthesis of other tris(imidazolium)phenylborane triflate salts and has similar spectral properties., Colorless crystals of this salt were grown by diffusion of pentane into a CH2Cl2 solution at −25 °C. The solid state structure reveals the expected four-coordinate boron center that is bound to a phenyl and three imidazolium groups (). Two triflate anions are also observed in the solid state structure.

Trispyrazolylborate - Wikipedia

Trispyrazolylborate refers specifically to ..

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.

T1 - Optically active and C3-symmetric tris(pyrazolyl)hydroborate and tris(pyrazolyl)phosphine oxide ligands

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).

Potassium tris(3,5-dimethyl-1-pyrazolyl)borate

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.

T1 - Acid-assisted reductive elimination as a route to platinum(II) products from platinum(IV) tris(pyrazolyl)borate reagents

tris- and tetrakis-(pyrazolyl)borate ligands.

Nieto, I.; Bontchev, R.P.; Smith, J.M. “Synthesis of a bulky bis(carbene)borate ligand. Contrasting structures of homoleptic nickel(II) bis(pyrazoyl)borate and bis(carbene)borate complexes.” Eur. J. Inorg. Chem., 2008, 2476-2480.

Synthesis and Determination of Polypyrazolylborates: …

Treatment of 2 with ...The reaction between KTp (Tp = tris(pyrazolyl)borate) and (PCy3)2(Cl)2RuCHPh affords Tp(PCy3)(Cl)RuCHPh (2) in high yield.

Tris pyrazolyl borate synthesis essay - Psrom

The donor strength of tris(pyrazolyl)borate ligands can be modified by suitable changes to the pyrazolyl ring substitutents. Similar flexibility in the donor strength of tris(carbene)borate ligands does not yet exist. In the case of monodentate NHC ligands, changing the N-substituents in imidazol-2-ylidenes does not typically have a major impact on the donor strength of the NHC ligand, and thus similar changes to the donors of tris(carbene)borate ligand are not expected to have a major influence on the ligand donor strength. However, recent work has shown that NHCs based on donors other than imidazol-2-ylidene can lead to large changes in donor strength. Thus, both experimental and computational studies of monodentate NHC ligands shows that carbenes derived from heterocycles other than imidazole can have substantially different donor strengths.