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Catena-Poly[[octa-aqua-bis-(?(4)-benzene-1,3,5-tricarboxyl-ato)trizinc] tetra-hydrate].

ABSTRACT: In the title compound, {[Zn(3)(C(9)H(3)O(6))(2)(H(2)O)(8)]·4H(2)O}(n), there are two crystallographically independent Zn(II) ions. One presents a trigonal-bipyramidal coordination geometry defined by five O atoms [three from two carboxyl-ate groups of two benzene-1,3,5-tricarboxyl-ate (BTC) ligands and the other two deriving from three water mol-ecules], while the other lies on an inversion centre and exists in a slightly distorted octa-hedral coordination geometry defined by six O atoms (two from two carboxyl-ate groups of two BTC ligands and the others from four water mol-ecules). A three-dimensional framework is further strengthened via O-H?O hydrogen-bonding inter-actons.

SUBMITTER: Sun L

PROVIDER: S-EPMC3089220 | biostudies-literature | 2011 May

REPOSITORIES: biostudies-literature

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catena-Poly[[octa-aqua-bis-(μ(4)-benzene-1,3,5-tricarboxyl-ato)trizinc] tetra-hydrate].

Sun Lin L Qiu Tao Run TR Deng Hong H

Acta crystallographica. Section E, Structure reports online 20110422 Pt 5

In the title compound, {[Zn(3)(C(9)H(3)O(6))(2)(H(2)O)(8)]·4H(2)O}(n), there are two crystallographically independent Zn(II) ions. One presents a trigonal-bipyramidal coordination geometry defined by five O atoms [three from two carboxyl-ate groups of two benzene-1,3,5-tricarboxyl-ate (BTC) ligands and the other two deriving from three water mol-ecules], while the other lies on an inversion centre and exists in a slightly distorted octa-hedral coordination geometry defined by six O atoms (two fr ...[more]

PMID: 21754339

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Poly[tetra-n-butyl-ammonium [(?(5)-benzene-1,3,5-tricarboxyl-ato)(?(4)-benzene-1,3,5-tricarboxyl-ato)-?(3)-hydroxido-trizincate] 0.25-hydrate].

Project description:In the asymmetric unit of title coordination polymer, {(C(16)H(36)N)[Zn(3)(C(9)H(3)O(6))(2)(OH)]·0.25H(2)O}(n), there are three independent Zn(2+) cations, two benzene-1,3,5-tricarboxyl-ate ligands and a ?(3)-bridging hydroxide group, together with a tetra-n-butyl-ammonium counter-cation and a partially occupied water molecule of solvation (occupancy 0.25). Each Zn ion is coordinated by three carboxyl-ate O atoms and one O atom from the bridging hydroxide ion, displaying a slightly distorted tetra-hedral stereochemistry [overall Zn-O range = 1.875?(3)-1.987?(2)?Å]. An intra-molecular hydrogen bond involving the hydroxide H atom and a carboxyl-ate O-atom acceptor is also present in the complex unit. The bridging benzene-1,3,5-tricarboxyl-ate anions generate a three-dimensional framework structure.

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catena-Poly[[[aqua-(5-nitro-benzene-1,2,3-tricarboxyl-ato-?O)nickel(II)]-di-?-aqua-[diaqua-sodium]-di-?-aqua] tetra-hydrate].

Project description:In the title complex, {[NaNi(C(9)H(2)NO(8))(H(2)O)(7)]·4H(2)O}(n), the Ni(II) atom has a distorted octa-hedral coordination, defined by five O atoms from five water mol-ecules and one O atom from one 5-nitro-benzene-1,2,3-tricarboxyl-ate ligand. The Na cation is coordinated by six water O atoms in an irregular trigonal-prismatic geometry. There are seven coordinated water mol-ecules in the asymmetic unit. The Ni and Na atoms are linked by water bridges, forming infinite chains, which are connected by strong O-H?O hydrogen bonds involving the coordinated and uncoordinated water mol-ecules into a three-dimensional network.

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catena-Poly[[[aqua-(5-nitro-benzene-1,2,3-tricarboxyl-ato-?O)copper(II)]-di-?-aqua-[diaqua-sodium]-di-?-aqua] tetra-hydrate].

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Poly[[hexa-aqua-bis-(?(3)-benzene-1,3,5-tricarboxyl-ato-?O:O:O)bis-(5,5'-dimethyl-2,2'-bipyridine-?N,N')trizinc] hexa-hydrate].

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catena-Poly[[[?-aqua-penta-aqua-dizinc(II)]-?(4)-benzene-1,2,4,5-tetra-carboxyl-ato] dihydrate].

Project description:The asymmetric unit of the title compound, {[Zn(2)(C(10)H(2)O(8))(H(2)O)(6)]·2H(2)O}(n), contains two distinct Zn atoms joined by a bridging water molecule and two bridging carboxyl-ate groups belonging to distinct halves of benzene-1,2,4,5-tetra-carboxyl-ate (tbec) tetra-anionic ligands, both lying on crystallographic inversion centres. The structure of this new isopolymorphic one-dimensional coordination polymer features asymmetric bimetallic octa-hedral knots. O-H?O hydrogen bonds between water molecules and carboxylate O atoms help to consolidate the crystal packing.

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Tetra-imidazolium piperazinediium bis-(benzene-1,3,5-tricarboxyl-ate) dihydrate.

Project description:During the crystallization of the title compound, 4C(3)H(5)N(2) (+)·C(4)H(12)N(2) (+)·2C(9)H(3)O(6) (3-)·2H(2)O, the acidic protons were transferred to the imidazole and piperazine N atoms, forming the final 4:1:2:2 hydrated mixed salt. The mean planes of the three carboxyl-ate groups in the anion are twisted with respect to the the central benzene ring, making dihedral angles of 13.5?(1), 14.5?(1) and 16.9?(1)°. In the crystal, the component ions are linked into a three-dimensional network by a combination of inter-molecular N-H?O, O-H?O and weak C-H?O hydrogen bonds. Further stabilization is provided by ?-? stacking inter-actions with centroid-centroid distances of 3.393?(2)?Å and weak C=O?? inter-actions [O-centroid = 3.363?(2)?Å].

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catena-Poly[bis-(4-amino-pyridinium) [[tetra-aqua-nickel(II)]-?-benzene-1,2,4,5-tetra-carboxyl-ato] dihydrate].

Project description:The asymmetric unit of the title compound, {(C(5)H(7)N(2))(2)[Ni(C(10)H(2)O(8))(H(2)O)(4)]·2H(2)O}(n), contains an Ni(II) atom, two water mol-ecules of coordination, one half of a benzene-1,2,4,5-tetra-carboxyl-ate (btec) anionic ligand, one 4-amino-pyridinium cation (papy) and an uncoordinated water mol-ecule. The metal center lies on an inversion center and adopts an octa-hedral geometry with the carboxyl-ate groups tilted out of the mean plane formed by the btec. In the crystal, mol-ecules are linked into one-dimensional coordination polymers running along the ac diagonal. The crystal structure is consolidated by N-H?O and O-H?O hydrogen bonds.

| S-EPMC2970276 | biostudies-literature

Octa-aqua-bis(μ(2)-1H-pyrazole-3,5-di-carboxyl-ato)tricopper(II) tetra-hydrate.

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| S-EPMC2979837 | biostudies-literature

Poly[(?(4)-benzene-1,3,5-tricarboxyl-ato)bis-(dimethyl sulfoxide-?O)-neodymium(III)].

Project description:The asymmetric unit of the title compound, [Nd(C(9)H(3)O(6))(C(2)H(6)OS)(2)](n), contains one Nd(3+) ion, one benzene-1,3,5-tricarb-oxy-lic ligand and two coordinating dimethyl sulfoxide mol-ecules. The Nd(3+) ion is coordinated by six O atoms from four carboxyl-ate groups of the benzene-1,3,5-tricarboxyl-ate ligands and two O atoms from two dimethyl sulfoxide mol-ecules. The metal-organic cluster formed upon symmetry expansion of the asymmetric unit consists of two metal atoms and four benzene-1,3,5-tricarboxyl-ate groups, creating a paddle-wheel-type building block arrangement. The remaining coordination sites are occupied by additional benzene-1,3,5-tricarboxyl-ate groups and dimethyl sulfoxide mol-ecules, forming a three-dimensional polymeric rare earth metal-organic framework structure.

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catena-Poly[[[diaqua-iron(II)]-μ-pyridine-2,5-dicarboxyl-ato-[tetra-aqua-iron(II)]-μ-pyridine-2,5-dicarboxyl-ato] tetra-hydrate].

Project description:In the crystal structure of the title compound, {[Fe(2)(C(7)H(3)NO(4))(2)(H(2)O)(6)]·4H(2)O}(n), there are two types of coordination for the Fe(II) atoms. One Fe(II) atom is in a distorted octa-hedral N(2)O(4) environment, with two chelating rings from the pyridine-dicarboxyl-ate ligands and two O atoms from the water mol-ecules, while the other is in a distorted octa-hedral O(6) environment with two O atoms from the pyridine-dicarboxyl-ate ligands and four O atoms from the water mol-ecules. Both Fe(II) atoms lie on crystallographic centers of symmetry. The complex possesses an infinite chain structure running along the [101] direction. These chains are inter-connected by the uncoordinated water mol-ecules through O-H⋯O hydrogen bonds.

| S-EPMC2960407 | biostudies-literature

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