Synthesis of a Bulky Bis(carbene)borate Ligand – Contrasting Structures of Homoleptic Nickel(II) Bis(pyrazolyl)borate and Bis(carbene)borate Complexes
Authors:
- 7 May 2008
- journal article
- research article
- Published by Wiley in European Journal of Inorganic Chemistry
- Vol. 2008 (15) , 2476-2480
Abstract
Twofold deprotonation of the “boronium” cation H2B(tBuImH)2+ I– provides access to the bulky bis(carbene)borate ligand H2B(tBuIm)2–. Transfer of the ligand to NiII sources affords the square‐planar, diamagnetic complex Ni[H2B(tBuIm)2]2. The properties of this complex are contrasted with the related bis(pyrazolyl)borate complex Ni[H2B(tBupyr)2]2, which is octahedral and paramagnetic. Density functional theory has been used to evaluate the reasons for the structural differences. Stabilization of the square‐planar geometry by the bis(carbene)borate ligand can be ascribed to its greater donor ability.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)Keywords
This publication has 24 references indexed in Scilit:
- Removing the Sting from the Tail: Reversible Protonation of Scorpionate Ligands in Cobalt(II) Tris(carbene)borate ComplexesInorganic Chemistry, 2006
- Comparative Studies with Zwitterionic Platinum(II) Bis(pyrazolyl)borate and 2,2‘-Bipyridylborate ComplexesOrganometallics, 2005
- A new synthetic route to bulky “second generation” tris(imidazol-2-ylidene)borate ligands: synthesis of a four coordinate iron(ii) complexChemical Communications, 2005
- Exploiting isolobal relationships to create new ionic liquids: novel room-temperature ionic liquids based upon (N-alkylimidazole)(amine)BH2+“boronium” ionsChemical Communications, 2005
- Pyrazolylborate Nickel(II) Complexes as Catalysts for the Formation of Polyketones from Ethene and Carbon Monoxide − Partial Hydrolysis of the Bis(pyrazolyl)borate Yields a Pyrazolyl(hydroxo)borate LigandEuropean Journal of Inorganic Chemistry, 2001
- Homoleptic carbene complexesInorganica Chimica Acta, 2001
- Scorpionates1999
- Borane-Substituted Imidazol-2-ylidenes: Syntheses, Structures, and Reactivity⋆European Journal of Inorganic Chemistry, 1998
- Mixed Valence, Tricopper(I,II,I) Complexes with Thiolate Bridges. Progress toward Synthetic Models of the Putative {Cu2}3+ Sites in Nitrous Oxide Reductase and Cytochrome c OxidaseInorganic Chemistry, 1995
- The crystal and molecular structure of bis[dihydrobis(1-pyrazolyl)borato]nickel(II): evidence for the absence of Ni–H interaction in polypyrazolyl borates of nickelActa Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1976