ABSTRACT: The title complex, [Cu(C(18)H(18)N(2)O(6))], was synthesized by the reaction of copper(II) acetate mono-hydrate with the ligand 4,4'-dimeth-oxy-2,2'-[ethyl-enedioxy-bis(nitrilo-methyl-idyne)]diphenol (H(2)L). The Cu atom is coordinated by two O atoms and two N atoms of the L(2-) unit. A bridged dimer is formed through inter-molecular Cu⋯O inter-actions [Cu⋯O = 1.9408 (15) Å], creating a distorted square-pyramidal geometry about the Cu atoms.
Project description:The title complex, [Cu(C(18)H(16)Br(2)N(2)O(4))(H(2)O)], lies on a crystallographic mirror plane with the Cu(II) ion coordinated by two N atoms and two O atoms of a tetra-dentate Schiff base ligand and one O atom from a water ligand in a slightly distorted square-pyramidal environment. The mirror plane, which coincides with the Cu-O(water) bond, imposes disorder of the atoms of the ethyl-ene group. In the crystal structure, inter-molecular O-H?O hydrogen bonds link complex mol-ecules into extended chains along [100].
Project description:In the title complex, [Ni(C(21)H(24)N(2)O(4))], the Ni(II) ion has a slightly distorted square-planar geometry, coordinated by the two N and two O atoms of a new tetra-dentate Schiff base ligand. The dihedral angle between the planes of the two NiNC(3)O chelate rings is 14.37?(12)°.
Project description:In the asymmetric unit of the title compound, [Cu(C(19)H(20)N(2)O(4))(H(2)O)], there are two independent mononuclear Cu(II) complexes. The coordination environment of each Cu(II) ion is square-pyramidal completed by two N atoms and two O atoms forming the basal plane, and one O atom of the water mol-ecule occupying the apical position. Neighbouring complexes are connected via O-H?O hydrogen bonds between the water mol-ecule and the meth-oxy group, forming a chain structure along the a axis. The propyl-ene groups of the two independent complexes are disordered over two positions with site occupancies of 0.361?(7):0.639?(7) and 0.224?(8):0.776?(8). The crystal under investigation was a partial inversion twin.
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 title Schiff base bis-oxime compound, C(20)H(24)N(2)O(6), lies across an inversion centre and adopts an E configuration with respect to the C=N bond. In the mol-ecule, the oxime group is roughly coplanar with the benzene ring, forming a dihedral angle of 1.77?(2)°. An intra-molecular O-H?N hydrogen bond forms a six-membered ring with an S(6) motif. Weak inter-molecular C-H?O hydrogen bonding is present in the crystal structure.
Project description:In the title compound, [Cu(C(16)H(12)Br(2)N(2)O(2))], the Cu(II) atom is coordinated in a slightly distorted square-planar geometry by two O and two N atoms of the tetra-dentate dianionic 4,4'-dibromo-2,2'-[ethane-1,2-diylbis(nitrilo-methyl-idyne)]diphen-olate Schiff base ligand.
Project description:The Schiff base, C(18)H(20)N(2)O(2), which lies about an inversion centre, adopts a linear conformation. The mol-ecules are packed by C-H⋯π inter-actions, forming a two-dimensional supra-molecular network.
Project description:The title complex, [Ni(C(18)H(18)N(2)O(4))(H(2)O)], lies on a mirror plane with the Ni(II) ion coordinated by two N and two O atoms of a tetra-dentate Schiff base ligand and one water O atom in a distorted square-pyramidal enviroment. The -CH(2)-CH(2)- group of the ligand is disordered equally over two sites about the mirror plane. The dihedral angle between the mean planes of the two symmetry-related chelate rings is 37.16?(6)°. In the crystal structure, inter-molecular O-H?O hydrogen bonds link complex mol-ecules into one-dimensional chains along [100] and these chains are linked, in turn, by very weak inter-molecular C-H?O hydrogen bonds into a two-dimensional network.
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:In the title complex, [Mn(2)(C(19)H(20)N(2)O(4))(2)(C(19)H(22)N(2)O(4))(2)](PF(6))(2), the Mn(III) ion is coordinated by two O [Mn-O = 1.855?(2) and 1.887?(2)?Å] and two N [Mn-N = 1.982?(3) and 1.977?(3)?Å] atoms from the tetra-dentate Schiff base ligand and a coordinated axial ligand [Mn-O = 2.129?(2)?Å]. The centrosymmetric dimer contains two Jahn-Teller-distorted Mn(III) ions, each in a nearly octa-hedral geometry, connected through two phenolate bridges from two ligands. There are two stereogenic centers. The methyl group and the H atom attached to the middle propane C atom are disordered over two positions with occupancy factors in the ratio 0.58:0.42. The crystal is therefore a mixture of two diasteroisomers, viz. RS/SR and RR/SS. In the axial ligand, the two benzene rings form a dihedral angle of 56.97?(5)° and the dihedral angle between the two MnNC(3)O chelate rings is 2.98?(12)°