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Tetra-μ-acetato-κO:O'-bis-[(N-ethyl-pyrimidin-2-amine)-copper(II)](Cu-Cu).

ABSTRACT: In the centrosymmetric title mol-ecule, [Cu(2)(CH(3)COO)(4)(C(6)H(9)N(3))(2)], each of the four acetate groups bridges a pair of Cu(II) atoms [Cu-Cu = 2.6540 (4) Å]. The distorted octa-hedral geometry of the metal atom is completed by an N-donor atom of the N-ethyl-pyrimidin-2-amine ligand: an intra-molecular N-H⋯O hydrogen links its N-H group to an acetate carboxyl-ate O atom. In the crystal, C-H⋯O inter-actions link the mol-ecules into a supra-molecular chain along the b axis.

SUBMITTER: Aiyub Z

PROVIDER: S-EPMC3007943 | biostudies-literature |

REPOSITORIES: biostudies-literature

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catena-Poly[[tetra-kis(μ(2)-acetato-κO:O')dicopper(II)(Cu-Cu)]-μ(2)-acetato-κO:O'-[bis-[μ(2)-3-(dimethyl-amino)propan-1-olato]-κN,O:O;κO:N,O-bis-[(tetra-hydro-furan-κO)copper(II)]]-μ(2)-acetato-κO:O'].

Project description:The title complex, [Cu(4)(C(5)H(12)NO)(2)(C(2)H(3)O(2))(6)(C(4)H(8)O)(2)](n), consists of dinuclear [Cu(2)(C(5)H(12)NO)(2)(THF)(2)] (THF is tetra-hydro-furan) and [Cu(2)(CH(3)COO)(4)] units linked through acetate ions, generating parallel one-dimensional polymeric chains propagating in the [10] direction. In the first dinuclear unit, Cu(II) ions related by inversion symmetry are bridged by two 3-(dimethyl-amino)propan-1-olate ligands. Likewise, a pair of inversion-related Cu(II) ions are bridged by four acetate groups. The crystallographically independent Cu centers are linked to one another by a single bridging acetate group, generating an infinite chain. The distorted square-pyramidal coordination of the first metal center is completed with an apical THF mol-ecule, with a long Cu-O bond length of 2.476 (5) Å. The geometry around the other metal atom is close to octa-hedral, and the Cu⋯Cu separation in this unit is 2.652 (1) Å. The distance between the metal centers in the first dinuclear unit is considerably longer [3.068 (1) Å], suggesting little or no bonding inter-action. The Cu⋯Cu separation between two acetate-bridged independent Cu centers is 4.860 (2) Å. The THF mol-ecule has methyl-ene groups disordered over two positions, with occupancies of 0.608 (13) and 0.392 (13).

| S-EPMC2960524 | biostudies-literature

Tetra-μ-acetato-κO:O'-bis-{[2,2-dimeth-yl-N-(pyridin-2-yl)propanamide-κN]copper(II)}(Cu-Cu).

Project description:The crystal structure of the title compound, [Cu(2)(C(2)H(3)O(2))(4)(C(10)H(14)N(2)O)(2)], reveals a dinuclear Cu(II) complex located about a center of inversion. The coordination environment of each Cu(II) cation is distorted octa-hedral, composed of four bridging acetate ligands, an apical pyridine donor and is completed by a Cu-Cu bond. The amide H atom forms intra-molecular hydrogen bonds to two carboxyl O atoms. In the crystal, weak inter-molecular pyridine-amide C-H⋯O inter-actions are also present.

| S-EPMC3238774 | biostudies-literature

Tetra-μ-acetato-κO:O'-bis{[(E)-2-styrylpyrazine-κN]copper(II)}.

Project description:In the binuclear title compound, [Cu(2)(CH(3)COO)(4)(C(12)H(10)N(2))(2)], the copper(II) ions are coordinated by four O atoms from two pairs of bridging acetate ligands and one N atom from a (E)-2-styryl-pyrazine ligand in a distorted tetra-hedral geometry. The structure displays no hydrogen bonding or π-π stacking inter-actions between the discrete binuclear entities.

| S-EPMC2983213 | biostudies-literature

Tetra-μ-acetato-κO:O'-bis-{[4-methyl-N-(4-methyl-phen-yl)pyridin-2-amine-κN]copper(II)}.

Project description:The title complex, [Cu(2)(CH(3)COO)(4)(C(13)H(14)N(2))(2)], features a binuclear mol-ecule, which lies about a crystallographic centre of inversion; the four acetate ions each bridge a pair of Cu(II) atoms. The coordination of the metal atom is distorted octa-hedral within a donor set defined by four O atoms, the heterocyclic N atom and the second Cu atom. The pyridine ring is twisted with respect to the tolyl ring and forms a dihedral angle of 35.34 (9)°. A bifurcated N-H⋯(O,O) hydrogen bond is present, linking the amine group to two carboxyl-ate O atoms derived from different acetate ions. In the crystal, C-H⋯π inter-actions link mol-ecules into a supra-molecular array in the bc plane.

| S-EPMC3007970 | biostudies-literature

Tetra-μ-acetato-κO:O'-bis-{[N-(4-chloro-phen-yl)-4-methyl-pyridin-2-amine-κN]copper(II)}.

Project description:In the crystal structure of the title complex, [Cu(2)(CH(3)COO)(4)(C(12)H(11)ClN(2))(2)], the complete binuclear mol-ecule is generated by a crystallographic centre of inversion; the four acetate groups each bridge a pair of Cu(II) atoms. The coordination of the metal atom is distorted octa-hedral within a donor set defined by four O atoms, the heterocyclic N atom and the second Cu atom. The pyridine ring is twisted with respect to the benzene ring, forming a dihedral angle of 33.9 (2)°. An intra-molecular N-H⋯O hydrogen bond is present between the amino group and a carboxyl O atom. Inter-molecular inter-actions of the C-H⋯π type link mol-ecules in the crystal structure.

| S-EPMC3008138 | biostudies-literature

Tetra-μ-methacrylato-κO:O'-bis-[(pyri-din-2-amine-κN)copper(II)].

Project description:In the title carboxyl-ate-bridged binuclear copper complex, [Cu(2)(C(4)H(5)O(2))(4)(C(5)H(6)N(2))(2)], each Cu(II) ion has a distorted square-based pyramidal environment formed by one N and four O atoms. The asymmetric unit contains two halves of two centrosymmetric mol-ecules, with Cu⋯Cu separations of 2.6498 (8) and 2.6528 (8) Å.

| S-EPMC2977582 | biostudies-literature

Poly[bis-(μ(4)-acetato-κO:O:O':O')bis-(μ(3)-acetato-κO:O:O)(μ(2)-acetato-κO:O')(μ(2)-acetic acid-κO:O')di-μ-aqua-copper(II)tris-odium].

Project description:In the title compound, [CuNa(3)(CH(3)CO(2))(5)(CH(3)COOH)(H(2)O)(2)](n), the Cu(II) atom lies on an inversion center and is coordinated by four O atoms from four acetate ligands, leading to a square-planar geometry. One Na(I) atom, lying on an inversion center, is coordinated by four O atoms from four acetate ligands and two bridging water mol-ecules in a distorted octa-hedral geometry. The other Na(I) atom is coordinated by five O atoms from five acetate ligands and a bridging water mol-ecule. A hy-droxy H atom lies on a twofold rotation axis and is shared by two acetate ligands. The crystal packing exhibits a polymeric layer parallel to (100), which is further stablized by intra-layer O-H⋯O hydrogen bonds. The layers are linked by inter-layer O-H⋯O hydrogen bonds.

| S-EPMC2983341 | biostudies-literature

Tetra-?-acetato-bis-[(1,3-benzothia-zole)copper(II)](Cu-Cu).

Project description:The title compound, [Cu(2)(CH(3)CO(2))(4)(C(7)H(5)NS)(2)] or [(C(7)H(5)NS)Cu](2)(?-O(2)CCH(3))(4), crystallizes with one mol-ecule per unit cell. The coordination number of copper is six with four basal O atoms, one axial N atom and one axial Cu atom. Four acetate ligands act as bidentate linker and connect two Cu atoms, with a crystallographic inversion center located at the mid-point of the Cu-Cu bond. The acetate ligands form slightly distorted square planes around each metal ion, while the copper ions are displaced by 0.2089?(4)?Å from these planes towards the N atoms. Thus, the Cu-Cu distance is elongated to 2.6378?(7)?Å, compared with the 2.2180?(7)?Å distance between the two basal planes. The angle between the basal plane and the Cu-N bond is 4.84?(6)°.

| S-EPMC3212163 | biostudies-literature

Tetra-?-acetato-bis-[(pyridine N-oxide)copper(II)](Cu-Cu).

Project description:The mol-ecule of the title binuclear copper(II) complex, [Cu(2)(CH(3)COO)(4)(C(5)H(5)NO)(2)], occupies a special position on a crystallographic inversion centre; the coordination environment of the Cu(II) atom is slightly distorted square-pyramidal and is made up of four O atoms belonging to four acetate groups in the basal plane with the O atom of pyridine N-oxide ligand in the apical position. The Cu-Cu distance is 2.6376?(6)?Å.

| S-EPMC2977355 | biostudies-literature

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

Project description:In the centrosymmetric dinuclear title Cu(II) complex, [Cu2(C7H4ClO2)(C2H5OH)2], the Cu-Cu distance is 2.5905 (4) Å. The two metal atoms are bridged by four 4-chloro-benzoate ligands and each has an ethanol mol-ecule in the axial position of the overall octahedral coordination environment. The crystal packing features O-H⋯O hydrogen bonds.

| S-EPMC3629496 | biostudies-literature

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