Abstract
The asymmetric unit of the title complex, [Ni(C14H11FNO)2], contains one-half of the mol-ecule with the Ni(II) cation lying on an inversion centre coordinated by a bidentate Schiff base anion. The cationic Ni(II) center is in a distorted square-planar coordination environment chelated by the imine N and phenolate O donor atoms of the two Schiff base ligands. The N and O donor atoms of the two ligands are mutually trans with Ni-N and Ni-O bond lengths of 1.9242 (10) and 1.8336 (9) Å, respectively. The fluoro-phenyl ring is almost orthogonal to the coordination plane and makes a dihedral angle of 82.98 (7)° with the phenolate ring. In the crystal, mol-ecules are linked into screw chains by weak C-H⋯F hydrogen bonds. Additional C-H⋯π contacts arrange the mol-ecules into sheets parallel to the ac plane.
Highlights
The asymmetric unit of the title complex, [Ni(C14H11FNO)2], contains one-half of the molecule with the NiII cation lying on an inversion centre coordinated by a bidentate Schiff base anion
We reported the syntheses and crystal structures of two related Schiff base complexes, bis{2-[(E)-(4-fluorobenzyl)iminomethyl]-6-methoxyphenolato-2N,O1}nickel(II) (Bahron et al, 2011) and bis{2-[(E)(4-methoxybenzyl)iminomethyl]phenolato-2N,O1}nickel(II)
The labelled atoms are related to the unlabelled atoms of the Schiff base ligands by the symmetry code: 1 x, y, 1 z
Summary
Schiff base ligands are well-known and important compounds because of their wide range of biological activities and uses in industrial systems (Feng et al, 2013; Kumar et al, 2010; Liu et al, 2005) as well as being versatile ligands for transition metals. Transition metal complexes with Schiff base ligands, especially those of PdII and NiII, have been shown to display a variety of structural features and, in some cases, exhibit interesting reactivity. In particular they can be photoluminescent (Guo et al, 2013a) and are used as catalysts for many organic reactions such as Heck and Suzuki crosscoupling reactions (Kumari et al, 2012; Teo et al, 2011). 1.9242 (10) Å and 1.8336 (9) Å, respectively These compare well with those observed in the two other closely related NiII complexes with N2O2 coordinating Schiff base ligands (Bahron et al, 2011; 2014). Makes a dihedral angle of 82.98 (7) with the phenolate ring (C1–C6)
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