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Tetra-kis(μ-2-methyl-benzoato)bis-[(2-methyl-benzoic acid)copper(II)].

ABSTRACT: In the title centrosymmetric dinuclear compound, [Cu(2)(C(8)H(7)O(2))(4)(C(8)H(8)O(2))(2)], four o-toluate anions form a cage around two Cu atoms in a syn-syn configuration. Two more o-toluic acid mol-ecules are apically bonded to the Cu atoms, which show a square-pyramidal coordination geometry. The acid H atoms are hydrogen bonded to the cage carboxyl O atoms [O⋯O = 2.660 (2) Å]. The mol-ecular packing forms a puckered pseudo-hexa-gonal close-packed layer in the (h00) plane, with soft inter-molecular H⋯H contacts (2.46-2.58 Å).

SUBMITTER: Sunil AC

PROVIDER: S-EPMC2960998 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Tetra-kis(μ-4-ethyl-benzoato-κO:O')-bis-[(4-ethyl-benzoic acid-κO)copper(II)].

Project description:The molecule of the title compound, [Cu(2)(C(9)H(9)O(2))(4)(C(9)H(10)O(2))(2)], lies on a center of inversion. It consists of four bridging ethyl-benzoate ligands, forming a cage around two Cu atoms in a syn-syn configuration, and two monodentate ethyl-benzoic acid ligands bonded apically to the square-planar Cu atoms. The Cu⋯Cu distance is 2.6047 (5) Å.

| S-EPMC2961780 | biostudies-literature

Tetra-kis(μ(2)-2-methyl-3,5-dinitro-benzoato-κO:O)bis-[aqua-copper(II)] tetra-hydrate.

Project description:The title compound, [Cu(2)(C(8)H(5)N(2)O(6))(4)(H(2)O)(2)]·4H(2)O, forms a centrosymmetric paddle-wheel-type dimer with an intra-molecular Cu⋯Cu distance of 2.6540 (4) Å. The Cu(II) atom is in a square-pyramidal coordination environment formed by four O atoms of four carboxyl-ate groups and one water mol-ecule, which is located in the apical position. The carboxyl-ate groups are twisted relative to the benzene rings by 11.09 (16) and 45.55 (19)°. The nitro groups are not coplanar with the parent aromatic rings [dihedral angles = 16.2 (3)-51.45 (14)°]. O-H⋯O hydrogen bonds between the coordinated water mol-ecules and one of the nitro groups, as well as π-π stacking inter-actions [centroid-centroid distance = 3.5764 (12) Å] between the benzene rings, assemble the complex mol-ecules into a one-dimensional polymeric structure which is further extended into a three-dimensional polymeric network via O-H⋯O hydrogen bonds involving the water molecules of crystallization.

| S-EPMC3051452 | biostudies-literature

Tetra-μ-benzoato-bis-[(6-methyl-quino-line)-copper(II)].

Project description:In the title compound, [Cu(2)(C(7)H(5)O(2))(4)(C(10)H(9)N)(2)], the paddle-wheel-type dinuclear complex is constructed by four bridging benzoate groups and two terminal 6-methyl-quinoline ligands. The asymmetric unit contains one-half of the whole mol-ecule, and there is an inversion center at the mid-point of the Cu⋯Cu bond. The octa-hedral coordination of each Cu atom, with four O atoms in the equatorial plane, is completed by the N atom of the 6-methyl-quinoline mol-ecule [Cu-N = 2.212 (2) Å] and by another Cu atom [Cu⋯Cu = 2.6939 (13) Å]. The Cu atom lies 0.234 Å out of the plane of the four O atoms. The molecular packing is stabilized by one intramolecular C-H⋯O as well as C-H⋯π and π-π interactions.

| S-EPMC2961840 | biostudies-literature

Tetra-kis(?-2-methyl-benzoato-?O:O')bis-[(methanol-?O)copper(II)].

Project description:In the title compound, [Cu(2)(C(8)H(7)O(2))(4)(CH(3)OH)(2)], the Cu-O bond distances are in the range 1.943?(2)-2.149?(2)?Å within a sligthly distorted square-pyramidal coordination. The Cu?Cu separation is 2.5912?(4)?Å. In the crystal, the mol-ecules are linked into polymeric chains propagating in [001] by inter-molecular O-H?O hydrogen bonds and C-H?? inter-actions.

| S-EPMC2979172 | biostudies-literature

Tetra-kis(?-4-methyl-benzoato-?O:O')bis-[(isonicotinamide-?N)copper(II)].

Project description:In the title centrosymmetric binuclear complex, [Cu(2)(C(8)H(7)O(2))(4)(C(6)H(6)N(2)O)(2)], the Cu atoms [Cu?Cu = 2.6375?(6)?Å] are bridged by four 4-methyl-benzoate (PMB) ligands. The four nearest O atoms around each Cu(II) ion form a distorted square-planar arrangement, and the distorted square-pyramidal coordination is completed by the pyridine N atom of the isonicotinamide (INA) ligand. Each Cu(II) ion is displaced by 0.2633?(1)?Å from the plane of the four O atoms, with an average Cu-O distance of 1.974?(2)?Å. The dihedral angles between carboxyl-ate groups and the adjacent benzene rings are 7.88?(19) and 9.68?(10)°, while the benzene rings are oriented at a dihedral angle of 85.90?(9)°. The pyridine ring is oriented at dihedral angles of 8.59?(7) and 83.89?(9)° with respect to the benzene rings. In the crystal structure, inter-molecular N-H?O hydrogen bonds link the mol-ecules into a three-dimensional network. ?-? contacts between the benzene rings and between the pyridine and benzene rings, [centroid-centroid distances = 3.563?(2) and 3.484?(2)?Å, respectively] may further stabilize the crystal structure.

| S-EPMC2983750 | biostudies-literature

Tetra-μ-benzoato-bis-[(quinoxaline)copper(II)].

Project description:The paddlewheel-type centrosymmetric dinuclear title complex, [Cu(2)(C(7)H(5)O(2))(4)(C(8)H(6)N(2))(2)], contains four bridging benzoate groups and two terminal quinoxaline ligands. The octa-hedral coordination around each Cu atom, with four O atoms in the equatorial plane, is completed by an N atom of a quinoxaline mol-ecule [Cu-N = 2.2465 (18) Å] and by the second Cu atom [Cu⋯Cu = 2.668 (5) Å]. The Cu atom is 0.216 Å out of the plane of the four O atoms.

| S-EPMC2960297 | biostudies-literature

Tetra-kis(μ-2-chloro-4-nitro-benzoato-κO:O')bis-[aqua-copper(II)].

Project description:In the title binuclear copper(II) complex, [Cu(2)(C(7)H(3)ClNO(4))(4)(H(2)O)(2)], each of the two independent Cu(II) center is five-coordinated by four O atoms of the carboxyl-ate groups in the basal plane and one O atom of a water mol-ecule in the apical position, in a distorted square-pyramidal geometry. The Cu-Cu distance is 2.6458 (4) Å. In the crystal structure, the dinuclear units are linked into a three-dimensional network by O-H⋯O, C-H⋯O and C-H⋯Cl hydrogen bonds. One of the Cl atoms is disordered over two positions with occupancies of 0.650 (2) and 0.350 (2).

| S-EPMC2967917 | biostudies-literature

Tetra-μ-2-methyl-benzoato-κO:O'-bis-[(ethanol-κO)copper(II)].

Project description:In the title dinuclear complex, [Cu(2)(C(8)H(7)O(2))(4)(C(2)H(5)OH)(2)], four 2-methyl-benzoato anions form a cage around two Cu(II) ions in a syn-anti configuration. Two ethanol mol-ecules coordinate the Cu atoms in apical positions, giving an overall square-pyramidal coordination geometry. The Cu⋯Cu separation is 2.600 (1) Å. In the crystal, mol-ecules are assembled into chains extending in [001] through O-H⋯O hydrogen bonds.

| S-EPMC3246983 | biostudies-literature

Tetra-kis-(μ-benzoato-κO:O')bis{[4-(di-methyl-amino)-pyridine-κN]zinc(II)}.

Project description:In the centrosymmetric binuclear title complex, [Zn(2)(C(7)H(5)O(2))(4)(C(7)H(10)N(2))(2)], the Zn atoms [Zn⋯Zn = 3.0037 (6) Å] are bridged by four benzoate ligands. Each of the Zn atoms assumes an approximately square-pyramidal environment, with four O atoms in a plane and the pyridine N atom at the apical site.

| S-EPMC3051476 | biostudies-literature

Crystal structure of tetra-kis-(μ-2,4,6-tri-methyl-benzoato-κ(2) O:O')bis-[(nicotinamide-κN (1))copper(II)].

Project description:In the title binuclear Cu(II) complex, [Cu2(C10H11O2)4(C6H6N2O)2], the two Cu(II) cations [Cu⋯Cu = 2.5990 (5) Å] are bridged by four 2,4,6-tri-methyl-benzoate (TMB) anions. The four nearest O atoms around each Cu(II) cation form distorted square-planar arrangements and the distorted square-pyramidal coordinations are completed by the pyridine N atoms of nicotinamide mol-ecules at distances of 2.164 (2) and 2.165 (2) Å, respectively. The Cu(II) cations are displaced by -0.2045 (3) and 0.2029 (3) Å from the corresponding planes formed by the nearest four O atoms. In the mol-ecule, the dihedral angles between the planes of the benzene rings and the adjacent carboxyl-ate groups are 80.6 (2), 51.4 (2), 24.4 (2) and 32.5 (2)°, while the planes of the pyridine rings are oriented at a dihedral angle of 11.28 (10)°. In the crystal, bifurcated N-H⋯O and weak C-H⋯O hydrogen bonds link the mol-ecules, enclosing R 2 (2)(8) and R 4 (4)(8) ring motifs, into a three-dimensional network. The structure contains a solvent-accessible void of 72 Å(3), but there is no solvent mol-ecule located within this void. The crystal studied was an inversion twin refined with a minor component of 0.488 (8).

| S-EPMC4571374 | biostudies-literature

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