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Catena-Poly[bis-[cis-dipyrimidine-trans-dithio-cyanato-iron(II)]-di-?-pyrimidine-[trans-dithio-cyanato-iron(II)]-di-?-pyrimidine].

ABSTRACT: In the crystal structure of the title compound, [Fe(3)(NCS)(6)(C(4)H(4)N(2))(8)](n), each iron(II) cation is coordinated by four N-bonded pyrimidine ligands and two N-bonded thio-cyanate anions in a distorted octa-hedral environment. The asymmetric unit consists of one iron cation located on a crystallographic center of inversion, as well as one iron cation, three thio-cyanate anions and four pyrimidine ligands occupying general positions. The structure consists of square secondary building units (SBUs) with an Fe atom at each corner, which are ?-N(1):N(3)-bridged by the pyrimidine ligands. The SBUs are linked into infinite chains running in the c-axis direction via common opposite corners.

SUBMITTER: Wriedt M

PROVIDER: S-EPMC2968508 | biostudies-other | 2009

REPOSITORIES: biostudies-other

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catena-Poly[bis-[cis-dipyrimidine-trans-dithio-cyanato-iron(II)]-di-μ-pyrimidine-[trans-dithio-cyanato-iron(II)]-di-μ-pyrimidine].

Wriedt Mario M Sellmer Sina S Jess Inke I Näther Christian C

Acta crystallographica. Section E, Structure reports online 20090221 Pt 3

In the crystal structure of the title compound, [Fe(3)(NCS)(6)(C(4)H(4)N(2))(8)](n), each iron(II) cation is coordinated by four N-bonded pyrimidine ligands and two N-bonded thio-cyanate anions in a distorted octa-hedral environment. The asymmetric unit consists of one iron cation located on a crystallographic center of inversion, as well as one iron cation, three thio-cyanate anions and four pyrimidine ligands occupying general positions. The structure consists of square secondary building unit ...[more]

PMID: 21582078

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Project description:The asymetric unit of the title compound, [NiCl(2)(C(5)H(5)N)(2)](n), contains two Ni(II) ions located on different twofold rotational axes, two chloride anions and two pyridine rings in general positions. Each Ni(II) ion is coordinated by two pyridine rings, which form dihedral angles of 33.0?(2) and 11.0?(2)° for the two centers, and four chloride anions in a distorted octa-hedral geometry. The chloride anions bridge Ni(II) ions related by translation along the short b axes into two crystallographically independent polymeric chains.

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catena-Poly[[diaqua-calcium(II)]-di-?-2-chloro-nicotinato].

Project description:The itle compound, [Ca(C(6)H(3)ClNO(2))(2)(H(2)O)(2)](n), contains polymeric chains extending along [100] that are generated by inversion centres. The Ca(2+) ions are bridged by 2-chloronicotinate groups and exhibit an eight-coordination by six carboxylate O atoms of four different 2-chloronicotinate ligands and two O atoms of water molecules. In the crystal structure, inter-molecular O-H?O, O-H?N and C-H?O hydrogen bonds result in the formation of a supra-molecular network structure. The ?-? contacts between the 2-chloro-nicotinate rings [centroid-centroid distances = 3.875?(3) and 3.701?(3)?Å] may further stabilize the structure.

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