Crystal structure of bis-[?-meth-oxy(pyridin-2-yl)methano-lato-?(3) N,O:O]bis[chlorido-copper(II)].
ABSTRACT: The racemic title compound, [Cu2(C7H8NO2)2Cl2], is composed of dinuclear mol-ecules in which meth-oxy(pyridin-2-yl)methano-late ligands bridge two symmetry-related Cu(II) ions. Each Cu(II) ion is coordinated in a square-planar geometry by one Cl atom, the N and O atoms of the bidentate ligand and the bridging O atom of the centrosymmetrically related bidentate ligand. The separation between the two Cu(II) atoms is 3.005?(1)?Å. In the crystal, non-classical C-H?O hydrogen bonds, weak ?-? stacking [centroid-centroid distance = 4.073?(1)?Å] and weak electrostatic Cu?Cl inter-actions [3.023?(1)?Å] link the dinuclear mol-ecules into chains running parallel to the b axis. These chains are further connected by weak C-H?Cl hydrogen bonds directed approximately along the a axis, forming a three-dimensional supra-molecular network.
Project description:The title compound, [Cu?Cl?(C??H??N?)?], is a new polymorph of a previously reported compound [Dehghanpour et al. (2011 ?). Acta Cryst. E67, m1296]. The current polymorph was obtained from an acetonitrile solution of the title compound. Like the first polymorph, it is monoclinic (space group P2?/c). The unique Cu(II) ion in the title centrosymmetric dinuclear complex is in a distorted trigonal-bipyramidal coordination environment formed by the bis--chelating N-heterocyclic ligand, two bridging Cl ligands and one terminal Cl ligand. In the crystal, weak C-H?Cl hydrogen bonds are observed in addition to ?-? stacking inter-actions, with a centroid-centroid distance of 3.6597?(18)?Å.
Project description:The asymmetric unit of the title compound, [Cu(2)(C(18)H(14)Cl(4)N(2)O(2))(2)](n), contains two independent Cu(II) ions which are bridged by a pair of 4,4',6,6'-tetra-chloro-2,2'-[butane-1,4-diylbis(nitrilo-methanylyl-idene)]diphenolate ligands, forming a dinuclear unit. One of the Cu(II) ions is coordinated in a distorted square-planar environment and the other is coordinated in a distorted square-pyramidal environment. The long apical Cu-O bond of the square-pyramidal coordinated Cu(II) ion is formed by a symmetry-related O atom, creating a one-dimensional polymer along . In addition, short inter-molecular Cl?Cl distances [3.444?(2)?Å] and weak ?-? inter-actions [centroid-centroid distances = 3.736?(2)-3.875?(3)?Å] are observed. The crystal studied was an inversion twin with a refined twin component ratio of 0.60?(1):0.40?(1).
Project description:The Cu(II) atom in the title compound, [Cu(C16H10ClN2O)2], is located on an inversion center and is tetra-coordinated by two N and two O atoms from two bidentate 1-[(E)-(2-chloro-phen-yl)diazen-yl]naphthalen-2-olate ligands, forming a square-planar complex. In the crystal, mol-ecules are linked via weak C-H?O and C-H?Cl hydrogen bonds, forming chains propagating along . There are also ?-? inter-actions present involving adjacent naphthalene rings [centroid-centroid distance = 3.661?(13)?Å].
Project description:The centrosymmetric dinuclear Cu(II) complex, [Cu(2)Cl(4)(C(24)H(21)N(5)O(4))(2)], was synthesized by the reaction of CuCl(2)·2H(2)O with the tripodal ligand 2,2'-[3-(1H-imid-azol-4-ylmeth-yl)-3-aza-pentane-1,5-di-yl]diphthalimide (L). Each of the Cu(II) ions is coordinated by two N atoms from the ligand, two bridging Cl atoms and one terminal Cl atom. The Cu(II) coordination can be best be described as a transition state between four- and five-coordination, since one of the bridging Cl atoms has a much longer Cu-Cl bond distance [2.7069?(13)?Å] than the other [2.2630?(12)?Å]. In addition, the Cu?Cu distance is 3.622?(1)?Å. The three-dimensional structrure is generated by N-H?O, C-H?O and C-H?Cl hydrogen bonds and ?-? inter-actions [centroid-centroid distances = 3.658?(4) and 4.020?(4)?Å].
Project description:The title dinuclear mercury(II) complex, [Hg<sub>2</sub>Cl<sub>4</sub>(C<sub>16</sub>H<sub>19</sub>N<sub>3</sub>)<sub>2</sub>], synthesized from the pyridine-derived Schiff base (<i>E</i>)-<i>N</i><sup>1</sup>,<i>N</i><sup>1</sup>-diethyl-<i>N</i><sup>4</sup>-[(pyridin-2-yl)methyl-idene]benzene-1,4-di-amine (DPMBD), has inversion symmetry. The five-coordinated Hg<sup>II</sup> atoms have distorted square-pyramidal stereochemistry comprising two N-atom donors from bidentate chelate BPMBD ligands and three Cl-atom donors, two bridging and one monodentate. The dihedral angle between the benzene and the pyridine rings in the BPMBD ligand is 7.55?(4)°. In the crystal, the dinuclear mol-ecules are linked by weak C-H?Cl hydrogen bonds, forming zigzag ribbons lying parallel to . Also present in the structure are ?-? inter-actions between benzene and pyridine rings [minimum ring-centroid separation = 3.698?(8)?Å].
Project description:The title dinuclear Cu(II) complex, [Cu2(C17H13N2O2)4], is located on an inversion centre. The Cu(II) atoms are each five-coordinated in a distorted square-pyramidal geometry by two N atoms and two O atoms from two bidentate ligands and one bridging O atom from another ligand. In the dinuclear complex, the Cu?Cu separation is 3.366?(3)?Å. In the crystal, complex mol-ecules are linked via weak C-H?O hydrogen bonds, forming a layer parallel to (-101).
Project description:The structure of the dinuclear title complex, [Cu(2)(C(5)H(9)O(2))(4)(C(5)H(5)N)(2)], represents a monoclinic polymorph of the previously reported triclinic form [Blewett et al. (2006 ?). Acta Cryst. E62, m420-m422]. Each carboxyl-ate group is bidentate bridging and the distorted octa-hedral geometry about each Cu(II) atom is completed by a pyridine N atom and the other Cu atom [Cu?Cu = 2.6139?(7)?Å]. In the crystal, mol-ecules are connected into supra-molecular chains via ?-? inter-actions formed by the pyridine rings [centroid-centroid distance = 3.552?(3)?Å] and these are connected into a two-dimensional array in the ac plane by C-H?? contacts. One of the tert-butyl groups is disordered over two orientations in a 0.734?(6):0.266?(6) ratio.
Project description:The Hg(II) ion in the title centrosymmetric dinuclear complex, [Hg(2)Cl(4)(C(13)H(12)N(2))(2)]·[HgCl(2)], adopts a distorted square-pyramidal geometry, being coordinated by the bis-chelating N-heterocyclic ligand, two bridging Cl atoms and one terminal Cl atom. One of the bridging Hg-Cl bonds [2.8428?(11)?Å] is significantly longer than the other [2.5327?(10)?Å]. In the crystal, there are weak ?-? inter-actions [centroid-centroid distance = 3.630?(3)?Å] between the aromatic rings of the discrete units. The HgCl(2) adduct molecule is located on an inversion centre and has an Hg-Cl bond length of 2.2875?(11)?Å.
Project description:The title compound, C(19)H(20)Cl(2)N(2), is a potential bidentate Schiff base ligand. Intra-molecular C-H?N hydrogen bonds form five-membered rings, generating S(5) ring motifs. Each imino functional group is coplanar with its adjacent benzene ring; the two benzene rings form a dihedral angle of 51.30?(4)°. An inter-esting feature of the crystal structure is weak inter-molecular Cl?Cl [3.4752?(4)?Å] and Cl?N [3.2927?(9)?Å] inter-actions. Inter-molecular Cl?N inter-actions link mol-ecules into dimers with R(2) (2)(22) ring motifs. The crystal structure is further stabilized by weak ?-? [centroid-centroid distances = 3.6970?(6)-3.8560?(6)?Å] inter-actions.
Project description:The title complex salt, [CuCl(C(12)H(8)N(2))(2)][Tb(NO(3))(4)(C(12)H(8)N(2))], consists of discrete [CuCl(phen))(2)](+) cations and [Tb(NO(3))(4)(phen)](-) anions (phen is 1,10-phenanthroline). The [CuCl(phen))(2)](+) cation contains a five-coordinate Cu(2+) ion, ligated by two bidentate phen ligands and one Cl(-) ion, exhibiting a distorted CuN(4)Cl trigonal-bipyramidal geometry. In the [Tb(NO(3))(4)(phen)](-) anion, the Tb(3+) ion is coordinated by one chelating phen ligand and four chelating nitrates, forming a distorted TbN(2)O(8) bicapped dodeca-hedral configuration. The anions and cations are assembled into a three-dimensional network by weak C-H?Cl and C-H?O hydrogen bonds. There is also a significant ?-? stacking inter-action, with a centroid-centroid distance of 3.635?(2)?Å.