{5,5'-Dihydr-oxy-2,2'-[o-phenyl-enebis-(nitrilo-methyl-idyne)]diphenolato}nickel(II) dihydrate.

ABSTRACT: In the title complex, [Ni(C(20)H(14)N(2)O(4))]·2H(2)O, the Ni(II) ion is in an essentially square-planar geometry involving an N(2)O(2) atom set of the tetra-dentate Schiff base ligand. The Ni atom lies on a crystallographic twofold rotation axis. The asymmetric unit contains one half-mol-ecule of the complex and a water mol-ecule. An inter-molecular O-H?O hydrogen bond forms a four-membered ring, producing an R(1) (2)(4) ring motif involving a bifurcated hydrogen bond to the phenolate O atoms of the complex mol-ecule. In the crystal structure, mol-ecules are linked by ?-? stacking inter-actions, with centroid-centroid distances in the range 3.5750?(11)-3.7750?(11)?Å. As a result of the twofold symmetry, the central benzene ring makes the same dihedral angle of 15.75?(9)° with the two outer benzene rings. The dihedral angle between the two hydroxy-phenyl rings is 13.16?(5)°. In the crystal structure, mol-ecules are linked into infinite one-dimensional chains by directed four-membered O-H?O-H inter-actions along the c axis and are further connected by C-H?O and ?-? stacking into a three-dimensional network. An inter-esting feature of the crystal structure is the short Ni?O, O?O and N?N inter-actions which are shorter than the sum of the van der Waals radii of the relevant atoms. The crystal structure is stabilized by inter-molecular O-H?O and C-H?O hydrogen bonds and by ?-? stacking inter-actions.

SUBMITTER: Fun HK 

PROVIDER: S-EPMC2960688 | biostudies-literature | 2008 Aug

REPOSITORIES: biostudies-literature