2-Mercapto-1-t-butylimidazolyl as a bridging ligand: Synthesis and structural characterization of nickel and palladium paddlewheel complexes
摘要:
Nickel and palladium paddlewheel complexes that feature 2-mercapto-1-t-butylimidazolyl (mim(But)) bridging ligands, namely Ni-2[mim(But)](4) and Pd-2[mim(But)](4), have been synthesized and structurally characterized by X-ray diffraction. Since the mimBut ligand bridges in an asymmetric manner via a sulfur and nitrogen donor, paddlewheel compounds of the type M-2[mim(But)](4) may exist as isomers that are distinguished by the relative orientations of the ligands. In this regard, the (4,0)-Ni-2[mim(But)](4) and trans-(2,2)-Ni-2[mim(But)](4) isomers have been isolated for the nickel system, while the (4,0)-Pd-2[mim(But)](4) and (3,1)-Pd-2[mim(But)](4) isomers have been isolated for the palladium system. (C) 2009 Elsevier B. V. All rights reserved.
Reactivity of the Ni→B dative σ-bond in the nickel boratrane compounds [κ4-B(mimBut)3]NiX (X = Cl, OAc, NCS, N3): synthesis of a series of B-functionalized tris(2-mercapto-1-tert-butylimidazolyl)borato complexes, [YTmBut]NiZ
作者:Keliang Pang、Joseph M. Tanski、Gerard Parkin
DOI:10.1039/b714466k
日期:——
The nickel boratrane complexes [κ4-B(mimBut)3]Ni(κ1-OAc), [κ4-B(mimBut)3]NiNCS and [κ4-B(mimBut)3]NiN3 are obtained viametathesis of the chloride ligand of [κ4-B(mimBut)3]NiCl with TlOAc, KSCN and NaN3, respectively; the NiâB bond in these complexes is a site of reactivity, thereby providing a means of synthesizing nickel complexes that feature B-functionalized tris(mercaptoimidazolyl)borate derivatives, [YTmBut]NiZ.