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Bis(2,2'-bipyridyl-?(2)N,N')bis-(dicyanamido-?N)manganese(II).

ABSTRACT: In title complex, [Mn(C(2)N(3))(2)(C(10)H(8)N(2))(2)], the Mn(II) ion is coordinated in a slightly distorted octa-hedral geometry by six N atoms. Four of the N atoms are from two chelating bipyridine ligands and two are from a pair of cis-coordinated dicyanamide ligands. The dihedral angle formed by the mean planes of the bipyridine rings is 85.93?(14)°. The central N atom of one of the dicyanamide ligands was refined as disordered over two sites with equal occupancies.

SUBMITTER: Wang H

PROVIDER: S-EPMC3344319 | biostudies-literature | 2012 May

REPOSITORIES: biostudies-literature

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Diazido-bis(2,2'-biimidazole)manganese(II).

Project description:In the title compound, [Mn(N(3))(2)(C(6)H(6)N(4))(2)], the Mn atom (site symmetry ) is bonded to two azide ions and two bidentate biimidizole ligands, resulting in a slightly distorted octa-hedral MnN(6) geometry for the metal ion. In the crystal structure, N-H⋯N hydrogen bonds help to consolidate the packing.

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cis-(Acetonitrile-?N)aqua-bis-(2,2'-bipyrimidine-?N,N)manganese(II) cis-diaqua-bis-(2,2'-bipyrimidine-?N,N)manganese(II) tetrakis(perchlorate) dihydrate.

Project description:The asymmetric unit of the title compound, [Mn(CH(3)CN)(C(8)H(6)N(4))(2)(H(2)O)][Mn(C(8)H(6)N(4))(2)(H(2)O)(2)](ClO(4))(4)·2H(2)O, contains two distinct cationic Mn(II) complexes, four perchlorate anions and two solvent water mol-ecules. In the two complexes, both Mn(II) ions are six-coordinated in a distorted octa-hedral environment, but one Mn ion has a cis-N(5)O coordination geometry defined by four N atoms of the two chelating 2,2'-bipyrimidine (bpym) ligands, one N atom of a coordinating acetonitrile mol-ecule and one O atom of a water ligand, whereas the other Mn ion has a cis-N(4)O(2) coordination geometry defined by four N atoms of the two bpym ligands and two O atoms of water ligands. In the crystal structure, the complex mol-ecules, anions and solvent water mol-ecules are linked by inter-molecular O-H?O and O-H?N hydrogen bonds. Three of the four perchlorate anions are disordered over two sets of sites in different ratios.

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Diaqua-bis(ciprofloxacinato)manganese(II) 2,2'-bipyridine solvate tetrahydrate.

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| S-EPMC2969266 | biostudies-literature

Bis(2,2'-bipyridyl-?N,N')(nitrato-?O,O')(trifluoro-acetato-?O)cadmium(II).

Project description:In the title complex, [Cd(C(2)F(3)O(2))(NO(3))(C(10)H(8)N(2))(2)], the Cd(II) ion is hepta-coordinated by two chelating 2,2'-bipyridyl ligands [Cd?N 2.370?(6)-2.416?(6)?Å], one carboxyl-ate O atom [Cd?O 2.290?(6)?Å] from the trifluoro-acetate ligand and two O atoms [Cd?O 2.386?(6), 2.633?(6)?Å] from a chelating nitrate anion. The trifluoro-methyl fragment is rotationally disordered between two orientations in a 0.640?(7):0.360?(7) ratio. In the crystal, weak inter-molecular C-H?O hydrogen bonds contribute to the crystal packing stability.

| S-EPMC2969603 | biostudies-literature

Bis(2,2'-bipyridyl-?N,N')bis-(2-hydroxy-benzoato)-?O;?O,O-cadmium(II) methanol solvate.

Project description:The title compound, [Cd(C(7)H(5)O(3))(2)(C(10)H(8)N(2))(2)]·CH(3)OH, contains one monomeric seven-coordinate cadmium complex and one methanol solvate mol-ecule. The Cd(II) atom is coordinated to two 2,2'-bipyridyl ligands via the N atoms and to two salicylate anions (Hsal(-)) via the carboxyl-ate O atoms, which act as monodentate ligand for the one and bidentate ligand for the second. The Cd(II) atom exhibits a {6 + 1} environment, approximately described as a distorted capped octa-hedron with the apical positions occupied by one of the two N atoms belonging to one bipyridyl ligand and one of the two carboxyl-ate O atoms from the monodentate Hsal(-) ligand. Two intra-molecular six-membered hydrogen-bonded rings are present, generated from inter-actions between the carboxyl-ate and hydr-oxy groups of the salicylate ligands. There is one inter-molecular hydrogen-bonding inter-action involving the methanol solvent mol-ecule and the carboxyl-ate group from the monodentate Hsal(-) ligand. The crystal packing is governed by ?-? stacking inter-actions [centroid-centroid distance = 3.783?(4)?Å] which occur between bipyridyl ligands, by C-H?O and C-H?? inter-actions and by numerous van der Waals contacts.

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