Two-dimensional coordination polymeric structures in the sodium, potassium and rubidium complex salts with (4-fluorophenoxy)acetic acid

2017 ◽  
Vol 73 (11) ◽  
pp. 979-983 ◽  
Author(s):  
Graham Smith
Keyword(s):  
Acetic Acid ◽  
The Other ◽  
Water Molecules ◽  
Two Dimensional ◽  
Primary Metal ◽  
Sodium Potassium ◽  
Distorted Octahedral ◽  
Bidentate Chelate ◽  
Complex Salts ◽  
Polymeric Structures

The structures of the sodium, potassium and rubidium complex salts of (4-fluorophenoxy)acetic acid (PFPA), namely poly[μ-aqua-aqua-μ-[2-(4-fluorophenoxy)acetato]-κ3 O 1,O 2:O 1′-sodium], [Na(C8H6FO3)(H2O)2] n , (I), and isotypic poly[μ5-[2-(4-fluorophenoxy)acetato]-κ5 O 1,O 2:O 1,O 1′:O 1′:O 1′:O 1′-potassium], [K(C8H6FO3)] n , (II), and poly[μ5-[2-(4-fluorophenoxy)acetato]-κ5 O 1,O 2:O 1,O 1′:O 1′:O 1′:O 1′-rubidium], [Rb(C8H6FO3)] n , (III), have been determined and their coordination polymeric structures described. In the structure of (I), the very distorted octahedral NaO6 coordination polyhedron comprises two bidentate chelating O-atom donors (carboxylate and phenoxy) of the PFPA ligand and three O-atom donors from water molecules, one monodentate and the other μ2-bridging between inversion-related Na centres in a cyclic manner. A bridging carboxylate donor generates two-dimensional polymer layers lying parallel to (001), in which intralayer water O—H...O hydrogen-bonding associations are also present. Structures (II) and (III) are isotypic, each having an irregular MO7 stereochemistry, with the primary metal–ligand bidentate chelate similar to that in (I) and extended into a two-dimensional polymeric layered structure, lying parallel to (100), through five additional bridging carboxylate O atoms. Two of these bonds are from an O,O′-bidentate chelate interaction and the other three are from μ3-O-atom bridges, generating cyclic links with short M...M separations [3.9064 (17) Å for (II) and 4.1001 (8) for (III)], the shortest being a centrosymmetric four-membered cyclic link. In the crystals of (I)–(III), intralayer C—H...F interactions are present, but no π–π ring interactions are found.

scholarly journals Two-dimensional coordination polymeric structures in caesium complexes with ring-substituted phenoxyacetic acids

2014 ◽  
Vol 70 (6) ◽  
pp. 606-612 ◽  
Author(s):  
Graham Smith ◽  
Daniel E. Lynch
Keyword(s):  
Acetic Acid ◽  
Water Molecule ◽  
Complex Iii ◽  
Phenoxyacetic Acid ◽  
Two Dimensional ◽  
Coordination Polyhedra ◽  
Bidentate Chelate ◽  
Phenoxyacetic Acids ◽  
Ligand Species ◽  
Polymeric Structures

The two-dimensional polymeric structures of the caesium complexes with the phenoxyacetic acid analogues (4-fluorophenoxy)acetic acid, (3-chloro-2-methylphenoxy)acetic acid and the herbicidally active (2,4-dichlorophenoxy)acetic acid (2,4-D), namely poly[[μ5-(4-fluorophenoxy)acetato][μ4-(4-fluorophenoxy)acetato]dicaesium], [Cs2(C8H6FO3)2]n, (I), poly[aqua[μ5-(3-chloro-2-methylphenoxy)acetato]caesium], [Cs(C9H8ClO3)(H2O)]n, (II), and poly[[μ7-(2,4-dichlorophenoxy)acetato][(2,4-dichlorphenoxy)acetic acid]caesium], [Cs(C8H5Cl2O3)(C8H6Cl2O3)]n, (III), are described. In (I), the Cs+cations of the two individual irregular coordination polyhedra in the asymmetric unit (one CsO7and the other CsO8) are linked by bridging carboxylate O-atom donors from the two ligand molecules, both of which are involved in bidentate chelateOcarboxy,Ophenoxyinteractions, while only one has a bidentate carboxylateO,O′-chelate interaction. Polymeric extension is achieved through a number of carboxylate O-atom bridges, with a minimum Cs...Cs separation of 4.3231 (9) Å, giving layers which lie parallel to (001). In hydrated complex (II), the irregular nine-coordination about the Cs+cation comprises a single monodentate water molecule, a bidentateOcarboxy,Ophenoxychelate interaction and six bridging carboxylate O-atom bonding interactions, giving a Cs...Cs separation of 4.2473 (3) Å. The water molecule forms intralayer hydrogen bonds within the two-dimensional layers, which lie parallel to (100). In complex (III), the irregular centrosymmetric CsO6Cl2coordination environment comprises two O-atom donors and two ring-substituted Cl-atom donors from two hydrogen bis[(2,4-dichlorophenoxy)acetate] ligand species in a bidentate chelate mode, and four O-atom donors from bridging carboxyl groups. The duplex ligand species lie across crystallographic inversion centres, linked through a short O—H...O hydrogen bond involving the single acid H atom. Structure extension gives layers which lie parallel to (001). The present set of structures of Cs salts of phenoxyacetic acids show previously demonstrated trends among the alkali metal salts of simple benzoic acids with no stereochemically favourable interactive substituent groups for formation of two-dimensional coordination polymers.

scholarly journals Crystal structures of {[Cu(Lpn)2][Fe(CN)5(NO)]·H2O}nand {[Cu(Lpn)2]3[Cr(CN)6]2·5H2O}n[where Lpn = (R)-propane-1,2-diamine]: two heterometallic chiral cyanide-bridged coordination polymers

2015 ◽  
Vol 71 (4) ◽  
pp. 392-397
Author(s):  
Olha Sereda ◽  
Helen Stoeckli-Evans
Keyword(s):  
Hydrogen Bonds ◽  
Coordination Polymers ◽  
Three Dimensional ◽  
Water Molecules ◽  
Two Dimensional ◽  
Asymmetric Unit ◽  
Compound I ◽  
Distorted Octahedral ◽  
Coordination Spheres ◽  
Compound Ii

The title compounds,catena-poly[[[bis[(R)-propane-1,2-diamine-κ2N,N′]copper(II)]-μ-cyanido-κ2N:C-[tris(cyanido-κC)(nitroso-κN)iron(III)]-μ-cyanido-κ2C:N] monohydrate], {[Cu(Lpn)2][Fe(CN)5(NO)]·H2O}n, (I), and poly[[hexa-μ-cyanido-κ12C:N-hexacyanido-κ6C-hexakis[(R)-propane-1,2-diamine-κ2N,N′]dichromium(III)tricopper(II)] pentahydrate], {[Cu(Lpn)2]3[Cr(CN)6]2·5H2O}n, (II) [where Lpn = (R)-propane-1,2-diamine, C3H10N2], are new chiral cyanide-bridged bimetallic coordination polymers. The asymmetric unit of compound (I) is composed of two independent cation–anion units of {[Cu(Lpn)2][Fe(CN)5)(NO)]} and two water molecules. The FeIIIatoms have distorted octahedral geometries, while the CuIIatoms can be considered to be pentacoordinate. In the crystal, however, the units align to form zigzag cyanide-bridged chains propagating along [101]. Hence, the CuIIatoms have distorted octahedral coordination spheres with extremely long semicoordination Cu—N(cyanido) bridging bonds. The chains are linked by O—H...N and N—H...N hydrogen bonds, forming two-dimensional networks parallel to (010), and the networks are linkedviaN—H...O and N—H...N hydrogen bonds, forming a three-dimensional framework. Compound (II) is a two-dimensional cyanide-bridged coordination polymer. The asymmetric unit is composed of two chiral {[Cu(Lpn)2][Cr(CN)6]}−anions bridged by a chiral [Cu(Lpn)2]2+cation and five water molecules of crystallization. Both the CrIIIatoms and the central CuIIatom have distorted octahedral geometries. The coordination spheres of the outer CuIIatoms of the asymmetric unit can be considered to be pentacoordinate. In the crystal, these units are bridged by long semicoordination Cu—N(cyanide) bridging bonds forming a two-dimensional network, hence these CuIIatoms now have distorted octahedral geometries. The networks, which lie parallel to (10-1), are linkedviaO—H...O, O—H...N, N—H...O and N—H...N hydrogen bonds involving all five non-coordinating water molecules, the cyanide N atoms and the NH2groups of the Lpn ligands, forming a three-dimensional framework.

scholarly journals The Layered Structure of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Nitrogen Atom ◽  
Single Crystals ◽  
Silica Gel ◽  
Layered Structure ◽  
Water Molecules ◽  
Two Dimensional ◽  
Space Group ◽  
Distorted Octahedral ◽  
Oxygen Atoms

Triclinic single crystals of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O have been grown in anaqueous silica gel. Space group P-1 (Nr. 2), a = 723.94(7) pm, b = 813.38(14) pm, c = 931.0(2) pm, α = 74.24(2)°, β = 79.24(2)°, γ = 65.451(10)°, V = 0.47819(14) nm3, Z = 1. Cu2+ is coordinated in a distorted, octahedral manner by two water molecules, three oxygen atoms ofthe pyromellitate anions and one nitrogen atom of pyrazine (Cu—O 194.1(2)–229.3(3) pm;Cu–N 202.0(2) pm). The connection of Cu2+ and [C6H2(COO)4)]4− yields infinite strands,which are linked by pyrazine molecules to form a two-dimensional coordination polymer.Thermogravimetric analysis in air showed that the dehydrated compound was stable between175 and 248 °C. Further heating yielded CuO.

scholarly journals Poly[[tetra-μ-cyanido-κ8C:N-dodeca-cyanido-κ12C-tris(N,N-dimethylformamide-κO)tris(methanol-κO)tris(3,4,7,8-tetramethyl-1,10-phenanthroline-κ2N,N′)trimanganese(II)ditungstate(V)] dihydrate]

2014 ◽  
Vol 70 (5) ◽  
pp. m170-m171
Author(s):  
Fei-Lin Yang ◽  
Dan Yang
Keyword(s):  
Water Molecule ◽  
Title Compound ◽  
Chain Structure ◽  
Octahedral Geometry ◽  
The Other ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
Asymmetric Unit ◽  
Π Interactions ◽  
Distorted Octahedral

The asymmetric unit of the title compound, {[Mn3{W(CN)8}2(C16H16N2)3(C3H7NO)3(CH3OH)3]·2H2O}n, consists of three [Mn(N,N-dimethylformamide)(methanol)(3,4,7,8-tetramethyl-1,10-phenanthroline)]2+cations, two [W(CN)8]3−anions and two water molecules. Each water molecule is disordered over three sets of sites, with a refined occupancy ratio of 0.310 (9):0.275 (9):0.415 (9) for one molecule and 0.335 (9):0.288 (9):0.377 (9) for the other molecule. The MnIIatoms exhibit a distorted octahedral geometry, while the WVatoms adopt a distorted square-antiprismatic geometry. The MnIIand WVatoms are linked alternatively through cyanide groups, forming a tetranuclear 12-atom rhombic metallacycle. Adjacent metallacycles are further connected by μ2-bridging cyanide anions, generating a 3,2-chain structure running parallel to [101]. Interchain π–π interactions are observed [centroid–centroid distances = 3.763 (3) and 3.620 (2) Å].

scholarly journals Diaquabis[N-(2-fluorobenzyl)-N-nitrosohydroxylaminato-κ2O,O′]nickel(II)

2014 ◽  
Vol 70 (3) ◽  
pp. m98-m99
Author(s):  
Olga Kovalchukova ◽  
Ali Sheikh Bostanabad ◽  
Adam Stash ◽  
Svetlana Strashnova ◽  
Igor Zyuzin
Keyword(s):  
Hydrogen Bonds ◽  
Organic Ligands ◽  
Water Molecules ◽  
Chelating Ligands ◽  
Two Dimensional ◽  
Organic Species ◽  
Octahedral Environment ◽  
Dimensional Network ◽  
Distorted Octahedral ◽  
Coordinated Water

In the centrosymmetric title compound, [Ni(C7H6FN2O2)2(H2O)2], the NiIIcation is in a slightly distorted octahedral environment and is surrounded by four O atoms from the N—O groups of the organic ligands [Ni—O = 2.0179 (13) and 2.0283 (12) Å], and two water molecules [Ni—O = 2.0967 (14) Å]. TheN-(2-fluorobenzyl)-N-nitrosohydroxylaminate monoanions act as bidentate chelating ligands. In the crystal, the Ni cations in the columns are shifted in such a way that the coordinated water molecules are involved in the formation of hydrogen bonds with the O atoms of the organic species of neighbouring molecules. Thus, a two-dimensional network parallel to (100) is built up by hydrogen-bonded molecules.

scholarly journals Two cadmium coordination polymers with bridging acetate and phenylenediamine ligands that exhibit two-dimensional layered structures

2016 ◽  
Vol 72 (12) ◽  
pp. 1718-1723 ◽  
Author(s):  
David K. Geiger ◽  
Dylan E. Parsons ◽  
Bracco A. Pagano
Keyword(s):  
Hydrogen Bonding ◽  
Coordination Polymers ◽  
Layered Structures ◽  
Two Dimensional ◽  
Coordination Environment ◽  
Distorted Octahedral ◽  
Water Of Hydration ◽  
Hydrogen Bonding Network ◽  
Polymeric Structures

Poly[tetra-μ2-acetato-κ8O:O′-bis(μ2-benzene-1,2-diamine-κ2N:N′)dicadmium], [Cd2(CH3COO)4(C6H8N2)2]n, (I), and poly[[(μ2-acetato-κ2O:O′)(acetato-κ2O,O′)(μ2-benzene-1,3-diamine-κ2N:N′)cadmium] hemihydrate], {[Cd(CH3COO)2(C6H8N2)]·0.5H2O}n, (II), have two-dimensional polymeric structures in which monomeric units are joined by bridging acetate and benzenediamine ligands. Each of the CdIIions has an O4N2coordination environment. The coordination geometries of the symmetry-independent CdIIions are distorted octahedral and distorted trigonal antiprismatic in (I) and distorted antiprismatic in (II). Both compounds exhibit an intralayer hydrogen-bonding network. In addition, the water of hydration in (II) is involved in interlayer hydrogen bonding.

Low-dimensional coordination polymeric structures in alkali metal complex salts of the herbicide (2,4-dichlorophenoxy)acetic acid (2,4-D)

2015 ◽  
Vol 71 (2) ◽  
pp. 140-145 ◽  
Author(s):  
Graham Smith
Keyword(s):  
Acetic Acid ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Rotation Axis ◽  
Layer Structure ◽  
Complex Iii ◽  
Polymeric Chain ◽  
Two Dimensional ◽  
Dichlorophenoxy Acetic Acid ◽  
Polymeric Structures

The Li, Rb and Cs complexes with the herbicide (2,4-dichlorophenoxy)acetic acid (2,4-D), namely poly[[aqua[μ3-(2,4-dichlorophenoxy)acetato-κ3O1:O1:O1′]lithium(I)] dihydrate], {[Li(C8H5Cl2O3)(H2O)]·2H2O}n, (I), poly[μ-aqua-bis[μ3-(2,4-dichlorophenoxy)acetato-κ4O1:O1′:O1′,Cl2]dirubidium(I)], [Rb2(C8H5Cl2O3)2(H2O)]n, (II), and poly[μ-aqua-bis[μ3-(2,4-dichlorophenoxy)acetato-κ5O1:O1′:O1′,O2,Cl2]dicaesium(I)], [Cs2(C8H5Cl2O3)2(H2O)]n, (III), respectively, have been determined and their two-dimensional polymeric structures are described. In (I), the slightly distorted tetrahedral LiO4coordination involves three carboxylate O-atom donors, of which two are bridging, and a monodentate aqua ligand, together with two water molecules of solvation. Conjoined six-membered ring systems generate a one-dimensional coordination polymeric chain which extends alongband interspecies water O—H...O hydrogen-bonding interactions give the overall two-dimensional layers which lie parallel to (001). In hemihydrate complex (II), the irregular octahedral RbO5Cl coordination about Rb+comprises a single bridging water molecule which lies on a twofold rotation axis, a bidentateOcarboxy,Cl-chelate interaction and three bridging carboxylate O-atom bonding interactions from the 2,4-D ligand. A two-dimensional coordination polymeric layer structure lying parallel to (100) is formed through a number of conjoined cyclic bridges, including a centrosymmetric four-membered Rb2O2ring system with an Rb...Rb separation of 4.3312 (5) Å. The coordinated water molecule forms intralayer aqua–carboxylate O—H...O hydrogen bonds. Complex (III) comprises two crystallographically independent (Z′ = 2) irregular CsO6Cl coordination centres, each comprising two O-atom donors (carboxylate and phenoxy) and a ring-substituted Cl-atom donor from the 2,4-D ligand species in a tridentate chelate mode, two O-atom donors from bridging carboxylate groups and one from a bridging water molecule. However, the two 2,4-D ligands are conformationally very dissimilar, with one phenoxyacetate side chain being synclinal and the other being antiperiplanar. The minimum Cs...Cs separation is 4.4463 (5) Å. Structure extension gives coordination polymeric layers which lie parallel to (001) and are stabilized by intralayer water–carboxylate O—H...O hydrogen bonds.

scholarly journals catena-Poly[(diaquastrontium)-bis{μ-5-[4-(1H-imidazol-1-yl)phenyl]tetrazolido}]

2012 ◽  
Vol 68 (4) ◽  
pp. m523-m524 ◽  
Author(s):  
Shao-Wei Tong ◽  
Shi-Jie Li ◽  
Wen-Dong Song ◽  
Dong-Liang Miao ◽  
Qi Deng
Keyword(s):  
Hydrogen Bonds ◽  
Title Complex ◽  
Water Molecules ◽  
Stacking Interactions ◽  
Two Dimensional ◽  
Distorted Octahedral Coordination ◽  
Dimensional Network ◽  
Distorted Octahedral ◽  
Ring Centroid ◽  
Complex Polymer

In the title complex polymer, [Sr(C10H7N6)2(H2O)2]n, the SrIIatom lies on an inversion centre and is coordinated by four N atoms from two bidentate bridgingtrans-related 5-[4-(1H-imidazol-1-yl)phenyl]tetrazolide ligands [Sr—N = 2.387 (4) Å for the tetrazolide moiety and Sr—N = 2.273 (5) Å for the imidazole moiety], and by two O atoms from water molecules [Sr—O = 2.464 (4) Å], giving a distorted octahedral coordination. Pairs of ligand bridges link the complex units, forming chains which extend along [111] and are inter-associated through Owater—H...N hydrogen bonds, giving a two-dimensional network structure parallel to (001). Weak π–π stacking interactions between the benzene and imidazole rings are also present [minimum ring centroid separation = 3.691 (4) Å].

scholarly journals Coordination polymeric structures in the sodium salt of 4-chloro-3-nitrobenzoic acid and the sodium and potassium salts of 4-nitroanthranilic acid

2013 ◽  
Vol 69 (12) ◽  
pp. 1472-1477 ◽  
Author(s):  
Graham Smith
Keyword(s):  
Hydrogen Bonding ◽  
Water Molecule ◽  
Coordination Polyhedron ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Two Dimensional ◽  
Π Interactions ◽  
Nitrobenzoic Acid ◽  
Distorted Octahedral ◽  
Polymeric Structures

The structures of the hydrated sodium salts of 4-chloro-3-nitrobenzoic acid {poly[aqua(μ4-4-chloro-3-nitrobenzoato)sodium(I)], [Na(C7H3ClNO4)(H2O)]n, (I)} and 2-amino-4-nitrobenzoic acid {poly[μ-aqua-aqua(μ3-2-amino-4-nitrobenzoato)sodium(I)], [Na(C7H5N2O4)(H2O)2]n, (II)}, and the hydrated potassium salt of 2-amino-4-nitrobenzoic acid {poly[μ-aqua-aqua(μ5-2-amino-4-nitrobenzoato)potassium(I)], [K(C7H5N2O4)(H2O)]n, (III)} have been determined and their complex polymeric structures described. All three structures are stabilized by intra- and intermolecular hydrogen bonding and strong π–π ring interactions. In the structure of (I), the distorted trigonal bipyrimidal NaO5coordination polyhedron comprises a monodentate water molecule and four bridging carboxylate O-atom donors, generating a two-dimensional polymeric structure lying parallel to (001). Intra-layer hydrogen-bonding associations and strong inter-ring π–π interactions are present. Structure (II) has a distorted octahedral NaO6stereochemistry, with four bridging O-atom donors, two from a single carboxylate group and two from a single nitro group and three from the two water molecules, one of which is bridging. Na centres are linked through centrosymmetric four-membered duplex water bridges and through 18-membered duplex head-to-tail ligand bridges. Similar centrosymmetric bridges are found in the structure of (III), and in both (II) and (III) strong inter-ring π–π interactions are found. A two-dimensional layered structure lying parallel to (010) is generated in (II), whereas in (III) the structure is three-dimensional. With (III), the irregular KO7coordination polyhedron comprises a doubly bridging water molecule, a single bidentate bridging carboxylate O-atom donor and three bridging O-atom donors from the two nitro groups. A three-dimensional structure is generated. These coordination polymer structures are among the few examples of metal complexes of any type with either 4-chloro-3-nitrobenzoic acid or 4-nitroanthranilic acid.

Poly[[diaqua-μ-1,2-benzene-1,2-dicarboxylato-μ-4,4′-bipyridine-copper(II)] dihydrate]: a two-dimensional copper(II) polymer

2006 ◽  
Vol 62 (5) ◽  
pp. m1156-m1158 ◽  
Author(s):  
Han Xu ◽  
Ran Sun ◽  
Yi-Zhi Li ◽  
Jun-Feng Bai
Keyword(s):  
Title Compound ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Water Molecules ◽  
Two Dimensional ◽  
Rectangular Grid ◽  
Distorted Octahedral

The title compound, {[Cu(C8H4O4)(C10H8N2)(H2O)2]·2H2O} n , contains chains of copper(II) centres bridged by bipyridine ligands along the b axis. The chains are bridged by phthalate dianions, forming a rectangular grid complex. Each CuII atom adopts a slightly distorted octahedral geometry, being coordinated by two N atoms of 4,4′-bipyridine, two O atoms of phthalate dianions and two water molecules. Twofold axes are located along the copper–bipyridine chains and through the phthalate dianions.

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