Bis[μ-N,N′-(pyridine-2,6-diyl)bis(trimethylsilylamido)-1κ²N¹,N²;2:3κ²N⁶:N⁶]bis(tetrahydrofuran)-2:3κ²O-1-nickel(II)-2,3-lithium(I)

Abstract

The title complex, [Li2Ni(C11H21N3Si2)2(C4H8O)2], is a trimetallic complex of two LiI cations and a NiII cation bridged by two N,N′-(pyridine-2,6-diyl)bis(trimethylsilylamide) ligands that crystallizes in the Fdd2 space group. The molecule has C 2 rotational symmetry, with the NiII cation located on the twofold axis. The coordination sphere of the NiII cation is composed of two amido N and two pyridyl N-atom donors in a distorted square-planar geometry. The LiI cations are coordinated by two amido N-atom donors and a tetrahydrofuran molecule with a long interaction with a pyridyl N-atom donor. The coordinating tetrahydrofuran ligand and a trimethylsilyl group are disordered. Intra- or intermolecular hydrogen bonding, as well as π–π stacking, are not observed between the molecules, likely indicating that weak electrostatic interactions are the dominant feature leading to the crystal structure.