ABSTRACT: The Ni(II) atom in the title monohydrate, [Ni(C(20)H(14)N(2)O(2))]·H(2)O, is coordinated within a cis-N(2)O(2) square-planar donor set provided by the tetra-dentate Schiff base ligand. Overall, the mol-ecule has a curved shape with the dihedral angle formed between the planes of the outer benzene rings being 13.92 (18)°. The water mol-ecule was found to be disordered over two positions [ratio 0.80 (1):0.20 (1)] and the major component is linked to the complex via an O-H⋯O hydrogen bond.
Project description:In the title compound, [Ni(C(21)H(24)N(2)O(2))]·H(2)O, both the complex mol-ecule and the water mol-ecule lie on a twofold rotation axis. The Ni(II) ion is coordinated in a distorted square-planar geometry by the tetra-dentate ligand. The dihedral angle between the two symmetry-related benzene rings is 47.12?(8)°. In the crystal, pairs of symmetry-related O-H?O hydrogen bonds form R(2) (2)(6) ring motifs. In addition, there are weak inter-molecular C-H?O hydrogen bonds, and ?-? stacking inter-actions with a centroid-centroid distance of 3.4760?(8)?Å.
Project description:In the title complex, [Co(C(22)H(18)N(2)O(4))(CN)(H(2)O)]·0.5CH(3)CN, the Co(III) cation is N,N',O,O'-chelated by a 6,6'-dimeth-oxy-2,2'-[1,2-phenyl-enebis(nitrilo-methanylyl-idene)]diphenolate dianion, and is further coordinated by a cyanide anion and a water mol-ecule in the axial sites, completing a distorted octa-hedral coordination geometry. In the crystal, pairs of bifurcated O-H?(O,O) hydrogen bonds link adjacent mol-ecules, forming centrosymmetric dimers. The acetonitrile solvent mol-ecule shows 0.5 occupancy.
Project description:In the title compound, [Ni(C(20)H(22)N(2)O(4))]·H(2)O, the Ni(II) ion and the water mol-ecule are located on a twofold rotation axis. The Ni ion is coordinated by two N [Ni-N = 1.8462 (18) Å] and two O [Ni-O = 1.8645 (14) Å] atoms in a distorted square-planar geometry. The water mol-ecule and the Ni complex mol-ecule are paired via O-H⋯O hydrogen bonds.
Project description:The asymmetric unit of the title compound, [Cu(C(21)H(24)N(2)O(2))]·H(2)O, comprises half of a Schiff base complex and half of a water mol-ecule. The whole compound is generated by crystallographic twofold rotation symmetry. The geometry around the Cu(II) atom, located on a twofold axis, is distorted square-planar, which is supported by the N(2)O(2) donor atoms of the coordinating Schiff base ligand. The dihedral angle between the symmetry-related benzene rings is 47.5?(4)°. In the crystal, the water mol-ecule that is hydrogen bonded to the coordinated O atoms links the mol-ecules via O-H?O inter-actions into chains parallel to [001]. The crystal structure is further stabilized by C-H?? inter-actions, and by ?-? inter-actions involving inversion-related chelate rings [centroid-centroid distance = 3.480?(4)?Å].
Project description:In the title complex, [Ni(C(22)H(16)Br(2)N(2)O(4))], the Ni(II) ion is coordinated by two N atoms and two O atoms of a tetra-dentate Schiff base ligand, forming a slightly distorted square-planar coordination environment. The dihedral angle between the two bromo-substituted benzene rings is 10.1?(3)°.
Project description:The asymmetric unit of the title compound, [Cu(C(21)H(24)N(2)O(4))]·H(2)O, comprises half of a Schiff base complex and a water mol-ecule. The Cu(II) atom, water mol-ecule and one C atom of the central propyl-ene segment are located on a twofold rotation axis. The geometry around the Cu(II) atom is distorted square-planar, supported by the N(2)O(2) donor atoms of the coordinating ligand. The dihedral angle between the symmetry-related benzene rings is 42.56?(19)°. In the crystal, O-H?O hydrogen bonds involving the water mol-ecule make an R(2) (1)(6) ring motif. Complex mol-ecules are linked into a chain along the c axis via C-H?O inter-actions.
Project description:The asymmetric unit of the title compound, [Ni(C(19)H(16)Br(4)N(2)O(2))], comprises half of a Schiff base complex. The geometry around the Ni(II) atom, located on a twofold rotation axis, is distorted square-planar, which is supported by the N(2)O(2) donor atoms of the coordinated ligand. The dihedral angle between the substituted benzene rings is 23.19 (17)°. In the crystal, a short inter-molecular Br⋯Br [3.6475 (7) Å] inter-action is present.
Project description:In the title complex, [Ni(C(21)H(15)ClN(2)O(2))], the Ni(II) ion is coordinated by two N and two O atoms from the tetra-dentate Schiff base ligand in a distorted square geometry. The crystal packing exhibits short inter-molecular Ni?Ni distances of 3.273?(3)?Å.
Project description: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.
Project description:In the title compound, [Cu(C22H24N2O4)]·H2O, the Cu(II) atom is four-coordinated in a distorted planar geometry with a mean deviation of 0.1164?(2)?Å for the plane generated by the ligating atoms of the salen-type Schiff base ligand. In the crystal, O(water)-H?O and C-H?O hydrogen bonds form a three-dimensional-network.