title: Bis{μ-N-[(E)-4-benz-yloxy-2-oxidobenzyl-idene]-4-nitro-benzene-carbo-hydrazidato}bis-[di-aqua-nickel(II)] di-methyl-formamide tetra-solvate.
abstract: The molecule of the title complex, [Ni2(C21H15N3O5)2(H2O)4]·4C3H7NO, is located on an inversion centre. This results in a dimeric Ni(II) complex, with the two Ni(II) atoms bridged by phenolate O atoms. The tridentate ligand is chelated to each Ni(II) atom via one N and two O atoms of the imino-late form of the hydrazide moiety, which has the same conformation as the free ligand. The coordination geometry around each Ni(II) ion is slightly distorted octa-hedral. A supra-molecular three-dimensional architecture is created by dominant inter-molecular O-H⋯N, O-H⋯O and C-H⋯O hydrogen-bonding inter-actions. These are augmented by two C-H⋯π inter-actions and a π-π inter-action with a centroid-centroid distance of 3.681 (2) Å.
authors.affiliation: Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India.
authors.forename: Bibitha
authors.initials: B
authors.lastname: Joseph
authors.affiliation: Department of Chemistry, Faculty of Science, Eastern University, Sri Lanka, Chenkalady, Sri Lanka.
authors.forename: M
authors.initials: M
authors.lastname: Sithambaresan
authors.affiliation: Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India.
authors.forename: M R Prathapachandra
authors.initials: MR
authors.lastname: Kurup
authors.affiliation: Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia ; Chemistry Department, King Abdulaziz University, PO Box 80203 Jeddah, Saudi Arabia.
authors.forename: Seik Weng
authors.initials: SW
authors.lastname: Ng