Synthesis and structure of trans-bis(4-amino-3-nitrobenzoato-κO)bis(4-amino-3-nitrobenzoic acid-κO)diaquamanganese(II) dihydrate
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ABSTRACT:
SUBMITTER: Narmanova F
PROVIDER: S-EPMC10842279 | biostudies-literature | 2024 Jan
REPOSITORIES: biostudies-literature
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Project description:The asymmetric unit of the title compound, [Mn(C7H4NO4)2(C6H6N2O)2(H2O)2], contains one Mn(II) atom, one 4-nitro-benzoate (NB) anion, one nicotinamide (NA) ligand and one water mol-ecule; NA and NB each act as a monodentate ligand. The Mn(II) atom, lying on an inversion centre, is coordinated by four O atoms and two pyridine N atoms in a distorted octa-hedral geometry. The water mol-ecules are hydrogen bonded to the carboxyl-ate O atoms. The dihedral angle between the carboxyl-ate group and the adjacent benzene ring is 24.4 (3)°, while the benzene and pyridine rings are oriented at a dihedral angle of 86.63 (11)°. In the crystal, O-H⋯O and N-H⋯O hydrogen bonds link the mol-ecules, forming a layer parallel to the ab plane. The layers are further linked via weak C-H⋯O hydrogen bonds, a π-π stacking inter-action [centroid-centroid distance = 3.868 (2) Å] and a weak C-H⋯π inter-action, resulting in a three-dimensional network.
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Project description:The title complex, [Cu(2)(C(7)H(6)NO(2))(2)(C(12)H(8)N(2))(2)(H(2)O)(2)]·2C(7)H(7)NO(2)·2H(2)O, consists of a dinuclear [Cu(2)(C(7)H(6)NO(2))(2)(C(12)H(8)N(2))(2)(H(2)O)(2)](2+) cation, two Cl(-) anions, two 4-amino-benzoic acid mol-ecules and two disordered water mol-ecules (site occupancy factors 0.5). The Cu(II) ion adopts a distorted square-pyramidal geometry formed by two N atoms from the 1,10-phenanthroline ligand and two O atoms of the two 4-amino-benzoic acid ligands and one water O atom. The Cu⋯Cu separation is 3.109 (2) Å. A twofold axis passes through the mid-point of the Cu⋯Cu vector.
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Project description:The cadmium atom in the title compound, [Cd(C(7)H(4)NO(4))(2)(C(6)H(6)N(2)O)(2)(H(2)O)(2)]·2H(2)O, lies on a center of inversion in an all-trans octa-hedral environment. In the crystal, the complex inter-acts with the uncoordinated water mol-ecules through O-H⋯O and N-H⋯O hydrogen bonds, forming a layered network.
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Project description:The title compound, [Mn(C(12)H(9)N(2)O(2)S)(2)(H(2)O)(4)]·2H(2)O, has been synthesized with a flexible asymmetrical bridging ligand, 4-(pyrazin-2-ylsulfanylmeth-yl)benzoic acid (Hpztmb). The Mn(II) ion exhibits a centrosymmetric octa-hedral geometry involving two carboxyl-ate O atoms of two different pztmb ligands and four O atoms of four coordinated water mol-ecules. The packing shows a three-dimensional supra-molecular network via O-H⋯O and O-H⋯N hydrogen bonds and π-π stacking inter-actions [centroid-centroid distances = 3.884 (8) and 4.034 (8) Å] between the benzene ring of one pztmb anion and the pyrazine ring of an adjacent anion.
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Project description:In the structure of the title salt, [Rb2(C7H5N2O4)2(H2O)2] n , the asymmetric unit comprises two independent and different seven-coordinate Rb(+) cations, one forming an RbO7 polyhedron, the other a RbO6N polyhedron, each of which is considerably distorted. The RbO7 polyhedron comprises bridging O-atom donors from two water mol-ecules, three carboxyl-ate groups, and two nitro groups. The RbO6N polyhedron comprises the two bridging water mol-ecules, one monodentate amine N-atom donor, one carboxyl O-atom donor and three O-atom donors from nitro groups (one from the chelate bridge). The extension of the dinuclear unit gives a three-dimensional polymeric structure which is stabilized by both intra- and inter-molecular amine N-H⋯O and water O-H⋯O hydrogen bonds to carboxyl and water O-atom acceptors, as well as a number of inter-ring π-π inter-actions [minimum centroid-centroid separation = 3.364 (2) Å]. The title salt is isostructural with the analogous caesium salt.
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Project description:In the structure of title compound, [Cs(2)(C(7)H(5)N(2)O(4))(2)(H(2)O)(2)](n), the asymmetric unit contains two independent Cs atoms comprising different coordination polyhedra. One is nine-coordinate, the other seven-coordinate, both having irregular configurations. The CsO(9) coordination polyhedron comprises O-atom donors from three bridging water mol-ecules, one of which is doubly bridging, three from carboxyl-ate groups, and three from nitro groups, of which two are bidentate chelate bridging. The CsO(6)N coordination polyhedron comprises the two bridging water mol-ecules, one amine N-atom donor, one carboxyl-ate O-atom donor and four O-atom donors from nitro groups (two from the chelate bridges). The extension of the dimeric unit gives a three-dimensional polymeric structure, which is stabilized by both intra- and inter-molecular amine N-H⋯O and water O-H⋯O hydrogen bonds to carboxyl-ate O-atom acceptors, as well as inter-ring π-π inter-actions [minimum ring centroid-centroid separation = 3.4172 (15) Å].
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Project description:The reaction of manganese(II) sulfate and 2-amino-pyrazine affords the title salt, [Mn(H(2)O)(6)][Mn(C(4)H(5)N(3))(2)(H(2)O)(4)](SO(4))(2)·2H(2)O. The metal atoms in the tetra-aqua-coordinated and hexa-aqua-coordinated cations lie on centers of inversion in octa-hedral geometries. The cations, anions and solvent water mol-ecules are linked by O-H⋯O, N-H⋯O and O-H⋯N hydrogen bonds into a three-dimensional network.
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Project description:The Mn(II) atom in the title compound, [Mn(CH(3)COO)(2)(C(4)H(5)N(3))(2)(H(2)O)(2)]·2H(2)O, is situated on a center of inversion and shows an octa-hedral coordination polyhedron made up by four O atoms and two N atoms. The octa-hedron is somewhat tetra-gonally distorted owing to the longer Mn-N bond [2.323 (3) Å]. The mononuclear complex mol-ecule and uncoordinated water mol-ecules are linked by O-H⋯N, N-H⋯O and O-H⋯O hydrogen bonds, generating a three-dimensional network.
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Project description:The title compound, [Co(C5H3N2O2)2(H2O)2]·2H2O, contains a Co(II) ion on an inversion center, exhibiting an octa-hedral coordination geometry. The equatorial plane is formed by two trans-related N,O-bidentate pyridazine-3-carboxyl-ate ligands and the axial positions are occupied by two water mol-ecules. The Co(II) complex mol-ecules are stacked in a column along the a-axis direction by an O-H⋯N hydrogen bond between the non-coordinating pyridazine N atom and the coordinating water mol-ecule. These columns are further connected into a layer parallel to the ac plane by additional hydrogen bonds involving the coordinating and non-coordinating water mol-ecules, and the non-coordinating carboxyl-ate O atom. The crystal packing is completed by inter-layer weak C-H⋯O inter-actions.
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