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Poly[?-aqua-bis-(?5-2,4-di-chloro-benzoato)dipotassium].

ABSTRACT: In the title compound, [K2(C7H3Cl2O2)2(H2O)] n , the potassium salt of 2,4-di-chloro-benzoic acid, the repeating unit in the polymeric structure consists of two identical irregular KO6Cl units related by twofold rotational symmetry, linked by a bridging water mol-ecule lying on the twofold axis. The coordination polyhedron about the K(+) ion comprises a carboxyl-ate O atom and a Cl-atom donor from a bidentate chelate ligand inter-action, four O-atom donors from a doubly bridging bidentate carboxyl-ate O,O'-chelate inter-action and the water mol-ecule. A two-dimensional polymeric structure lying parallel to (100) is generated through a series of conjoined cyclic bridges between K(+) ions and is stabilized by water-carboxyl-ate O-H?O hydrogen-bonding inter-actions.

SUBMITTER: Smith G

PROVIDER: S-EPMC3914057 | biostudies-literature | 2014 Jan

REPOSITORIES: biostudies-literature

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Poly[μ-aqua-bis-(μ5-2,4-di-chloro-benzoato)dipotassium].

Smith Graham G

Acta crystallographica. Section E, Structure reports online 20131218 Pt 1

In the title compound, [K2(C7H3Cl2O2)2(H2O)] n , the potassium salt of 2,4-di-chloro-benzoic acid, the repeating unit in the polymeric structure consists of two identical irregular KO6Cl units related by twofold rotational symmetry, linked by a bridging water mol-ecule lying on the twofold axis. The coordination polyhedron about the K(+) ion comprises a carboxyl-ate O atom and a Cl-atom donor from a bidentate chelate ligand inter-action, four O-atom donors from a doubly bridging bidentate carbox ...[more]

PMID: 24526950

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Poly[bis-(?-2-amino-4-nitro-benzoato)di-?-aqua-dirubidium].

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 ?-? inter-actions [minimum centroid-centroid separation = 3.364?(2)?Å]. The title salt is isostructural with the analogous caesium salt.

| S-EPMC4011243 | biostudies-literature

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Poly[μ-aqua-di-μ-benzoato-lead(II)].

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Project description:In the crystal of the title Cd(II) polymeric complex, [Cd(C7H4ClO2)2(C10H14N2O)(H2O)] n , the Cd(II) cation is chelated by two chloro-benzoate anions and coordinated by two N,N-di--ethyl-nicotinamide (DENA) ligands and one water mol-ecule in a distorted NO6 penta-gonal-bipyramidal geometry. The Cd(II) cations are bridged by the pyridine N atom and carbonyl O atom of the DENA ligand to form a polymeric chain running along the b axis. Inter-molecular O-H?O hydrogen bonds between coordinating water mol-ecules and carboxyl-ate groups link adjacent chains into layers parallel to the bc plane. ?-? contacts between benzene rings [shortest centroid-centroid distance = 3.912?(2)?Å] further stabilizes the crystal structure. In the mol-ecule, weak C-H?O hydrogen bonds occur between the pyridine ring and carboxyl-ate groups; the dihedral angles between the carboxyl-ate groups and adjacent benzene rings are 4.6?(3) and 12.8?(3)°, while the benzene rings are oriented at a dihedral angle of 1.89?(13)°.

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catena-Poly[[aqua-cadmium(II)]-bis-(?(2)-4-chloro-benzoato)].

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catena-Poly[[bis-(5-chloro-2-nitro-benzoato)copper(II)]-bis-(?-5-chloro-2-nitro-benzoato)].

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Poly[di-?-aqua-bis-(?-2-amino-4-nitro-benzoato)dicaesium].

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 ?-? inter-actions [minimum ring centroid-centroid separation = 3.4172?(15)?Å].

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Bis(μ-2,4-dihy-droxy-benzoato-κO:O')bis-[aqua-(2,4-dihy-droxy-benzoato-κO)(1,10-phenanthroline-κN,N')cadmium(II)].

Project description:In the title centrosymmetric dimeric Cd(II) complex, [Cd(2)(C(7)H(5)O(4))(4)(C(12)H(8)N(2))(2)(H(2)O)(2)], the Cd(II) cation is coord-inated by a bidentate phenanthroline (phen) ligand, three dihy-droxy-benzoate (dhba) anions and one water mol-ecule in a distorted CdN(2)O(4) octa-hedral geometry. Among the dhba anions, two anions bridge two Cd(II) cations to form the dimeric complex with significant different Cd-O bond distances of 2.2215 (19) and 2.406 (2) Å. The centroid-centroid distance of 3.4615 (19) Å between two nearly parallel benzene rings of the dhba and phen ligands coordinating to the same Cd(II) cation indicates the existence of intra-molecular π-π stacking in the complex. Extensive O-H⋯O hydrogen bonding and inter-molecular weak C-H⋯O hydrogen bonding help to stabilize the crystal structure. One hy-droxy group of the monodentate dhba ligand is disordered over two sites with a site-occupancy ratio of 0.9:0.1.

| S-EPMC3006915 | biostudies-literature

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