Synthesis and crystal structure of a disubstituted nickel(II) bis[(dimethylaminophenylimino)ethyl]pyridine chloride complex

Abstract

The solvated title compound, bis[2,6-bis(1-{[4-(dimethylamino)phenyl]imino-κN}ethyl)pyridine-κN]nickel(II) dichloride–dichloromethane–water (1/2/2), [Ni(C25H29N5)2]Cl2·2CH2Cl2·2H2O, represents a nickel(II) bis(pyridine diimine) complex with electron-donating dimethylaminophenyl substituents. The complex crystallizes as a water/dichloromethane solvate with Z′ = 2, thus the asymmetric unit consists of two NiII complex cations, four chloride anions, four adventitious water and four dichloromethane solvent molecules. Around each octahedrally coordinated NiII cation, one pendant phenyl group on each of the two ligands has an intramolecular π–π interaction with the pyridine ring of the other chelating ligand. In the crystal, pairs of water molecules are hydrogen bonded to pairs of chlorine atoms. The dichloromethane solvent molecules are likewise hydrogen bonded to the chloride anions.

Bis{2,6-bis[(E)-(4-fluorobenzylimino)methyl]pyridine}nickel(II) dinitrate dihydrate

“…The Ni-N bond lengths involving the pyridine rings range from 1.8647 (17) to 2.2131 (18) Å . The coordination sphere of Ni in this Ncontaining environment is, in comparison with other structures (Matthews et al, 2017;Basaran et al, 2015), in fact unusual. Such a distortion is rather characteristic for Cu II or Mn III complexes (Salaudeen et al, 2008;Halcrow, 2013).…”