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Bis(triethyl-ammonium) bis-(μ-pyrazine-2,3-dithiol-ato)bis-(pyrazine-2,3-dithio-lato)diferrate(III) methanol disolvate.

ABSTRACT: In the title compound, (C(6)H(16)N)(2)[Fe(2)(C(4)H(2)N(2)S(2))(4)]·2CH(4)O, the [Fe(III)(pdt)(2)](-) anion (pdt is pyrazine-2,3-dithiol-ate) forms a centrosymmetric dimer supported by two Fe(III)-S bonds [Fe-S = 2.4787 (4) Å]. In the crystal structure, dimers form a one-dimensional stack along the b axis via π-π stacking inter-actions, the inter-planar separation between adjacent dimers being 3.51 (2) Å. The methanol solvent mol-ecule is involved in two hydrogen bonds in which the hydroxyl group acts as a hydrogen-bond donor to the N atom of a pdt ligand and the O atom acts as an acceptor for the NH group of the triethyl-ammonium cation.

SUBMITTER: Yamaguchi T

PROVIDER: S-EPMC2967914 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:In the centrosymmetric title coordination compound, [Er(2){Fe(C(5)H(5))(C(6)H(4)O(2))}(6)(CH(3)OH)(2)(H(2)O)(2)]·2CH(3)OH, the two Er(III) ions are bridged by two ferrocene-carboxyl-ate anions as asymmetrically bridging ligands, leading to dimeric cores. The Er(III) ion has a distorted dodeca-hedral coordination with six coordinating O atoms derived from the ferrocene-carboxyl-ate ligands and two coordinated O atoms from one water mol-ecule and one methanol mol-ecule. The asymmetric unit comprises a half of the complex mol-ecule and a methanol solvent mol-ecule. Intra-molecular O-H?O and C-H?O inter-actions occur. In the crystal, mol-ecules are linked by inter-molecular O-H?O hydrogen bonds and C-H?O as well as C-H?? inter-actions.

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Project description:The title compound, (C(6)H(9)N(2))(2)[Cu(C(6)H(2)N(2)O(4))(2)(H(2)O)(2)]·6H(2)O, consists of a mononuclear trans-[Cu(pzdc)(2)(H(2)O)(2)](2-) dianion (pzdc is pyrazine-2,3-dicarboxyl-ate) and two [ampyH](+) cations (ampy is 2-amino-4-methyl-pyridine) with six water mol-ecules of solvation. The Cu(II) atom is hexa-coordinated by two pzdc groups and two water mol-ecules. The coordinated water mol-ecules are in trans-diaxial positions and the pzdc dianion acts as a bidentate ligand through an O atom of the carboxyl-ate group and the N atom of the pyrazine ring. There are diverse hydrogen-bonding inter-actions, such as N-H?O and O-H?O contacts, which lead to the formation of a three-dimensional supra-molecular architecture.

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Project description:The title compound, (C(6)H(9)N(2))(2)[Co(C(6)H(2)N(2)O(4))(2)(H(2)O)(2)]·8H(2)O, was obtained by the reaction of CoCl(2)·6H(2)O with 1,4-pyrazine-2,3-dicarb-oxy-lic acid and 2-amino-6-methyl-pyridine in aqueous solution (molar ratio 1:2:2). The Co(II) ion is situated on an inversion centre and is coordinated by two O and two N atoms of two symmetry-related 1,4-pyrazine-2,3-dicarboxyl-ate ligands and two water mol-ecules and has a disorted octa-hedral coordination environment. The asymmetric unit also contains four water mol-ecules. In the crystal, extensive inter-molecular classical N-H?O, O-H?O and O-H?N hydrogen bonds and ?-? stacking inter-actions [centroid-centroid distance = 3.490?(1)?Å] connect the various components, forming a three-dimensional network.

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Bis(2-amino-6-methyl-pyridinium) trans-diaqua-bis-(pyrazine-2,3-dicarboxyl-ato)cuprate(II) hexa-hydrate.

Project description:The title compound, (C(6)H(9)N(2))(2)[Cu(C(6)H(2)N(2)O(4))(2)(H(2)O)(2)]·6H(2)O, was obtained by the reaction of CuCl(2)·2H(2)O with pyrazine-2,3-dicarb-oxy-lic acid (pyzdcH(2)) and 2-amino-6-methyl-pyridine (2a-6mpy) in aqueous solution. The Cu(II) atom is located on an inversion centre and has an overall octa-hedral coordination environment. Two N and two O atoms from (pyzdc)(2-) ligands define the equatorial plane and two water mol-ecules are in axial positions, resulting in a typical tetra-gonally Jahn-Teller-distorted environment. Extensive classical O-H?O, O-H?N and N-H?O and non-classical C-H?O hydrogen bonds, as well as ?-? stacking inter-actions between aromatic rings of the cations [centroid-centroid distance = 3.58?(9)?Å], lead to the formation of a three-dimensional supra-molecular structure.

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