title: A square-planar Ni(II) complex with an asymmetric coordination of a novel polynucleative 2,6-diacetylpyridine bis{[2-(hydroxyimino)propanoyl]hydrazone} ligand.
abstract: The title compound, (2,6-diacetylpyridine bis{[2-(hydroxyimino)propanoyl]hydrazone}(2-))nickel(II) dimethyl sulfoxide solvate monohydrate, [Ni(C(15)H(17)N(7)O(4))] x C(2)H(6)OS x H(2)O, represents the first example of square-planar N(4) coordination via N atoms with four different functions, namely amide, azomethine, hydroxyimino and pyridine. The coordination polyhedron of the central Ni atom has a slightly distorted square-planar geometry. The 2,6-diacetylpyridine bis{[2-(hydroxyimino)propanoyl]hydrazone} ligand forms one six- and two five-membered chelate rings, and a pseudo-chelate ring through an intramolecular hydrogen bond with an amide group as donor and a deprotonated hydroxyimino group as acceptor, resulting in a pseudomacrocyclic arrangement.
authors.affiliation: Department of Chemistry, National Taras Shevchenko University, Volodymyrska Street 64, 01601 Kyiv, Ukraine.
authors.forename: Maxym V
authors.initials: MV
authors.lastname: Plutenko
authors.forename: Yurii S
authors.initials: YS
authors.lastname: Moroz
authors.forename: Tetyana Yu
authors.initials: TY
authors.lastname: Sliva
authors.forename: Matti
authors.initials: M
authors.lastname: Haukka
authors.forename: Igor O
authors.initials: IO
authors.lastname: Fritsky
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: C527940:(2,6-diacetylpyridine bis((2-(hydroxyimino)propanoyl)hydrazone)(2-))nickel(II); D008024:Ligands; D009942:Organometallic Compounds; D009532:Nickel