Nickel(II) Complexes Containing a Pyrrole–Diphosphine Pincer Ligand
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https://figshare.com/articles/dataset/Nickel_II_Complexes_Containing_a_Pyrrole_Diphosphine_Pincer_Ligand/2464549
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资源简介：
A new pincer ligand, (P2PhPyr)−, based on the anion of 2,5-bis[(diphenylphosphino)methyl]pyrrole
has been prepared in four steps from pyrrole. The ligand undergoes
oxidation to diphosphine oxide under ambient conditions and was therefore
isolated as its borane adduct, H(P2PhPyr)·2BH3 (2). Delivery of the ligand to nickel(II) was
accomplished by the direct reaction of NiCl2 with 2 in the presence of Et2NH to afford [NiCl(P2PhPyr)]. Salt metathesis reactions of the chloro
complex afford new compounds including [Ni(CH3)(P2PhPyr)] and [Ni(NCCH3)(P2PhPyr)](OTf). In all cases, the ligand gives rise to diamagnetic square-planar
complexes, which have been fully characterized in solution and the
solid state. All complexes examined display an irreversible oxidation
to nickel(III) according to cyclic voltammetry. Reduction of the chloro
complex in dichloromethane results in an electrocatalytic process,
whereas reduction in tetrahydrofuran leads to the irreversible formation
of a nickel(I) species.
创建时间：
2016-02-20
