scholarly journals Co[(C6H10)(NH3)2][C6H2(COO)4] · 2H2O and Zn[(C6H12)(NH3)2][C6H2(COO)4] · 1/2H2O - Two Zeolite-Like Three-Dimensional Coordination Polymers

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Thermogravimetric Analysis ◽  
Coordination Polymer ◽  
Single Crystals ◽  
Coordination Polymers ◽  
Three Dimensional ◽  
Water Molecules ◽  
Crystallographic Axis ◽  
Excess Charge ◽  
Space Group ◽  
Oxygen Atoms

Monoclinic single crystals of Co[(C6H10)(NH3)2][C6H2(COO)4] · 2H2O have been prepared inaqueous solution at 80 °C. Space group C2/c (no. 15), a = 1065.92(8), b = 1568.97(9), c =1140.88(9) pm, β = 90.101(6)°, V = 1.9080(2) nm3, Z = 4. Co2+, which is situated on atwofold crystallographic axis, is coordinated in a moderately distorted tetrahedral fashion byfour oxygen atoms stemming from the pyromellitate anions (Co-O 197.87(12) and 200.64(12)pm). A three-dimensionally connected coordination polymer is made up by Co2+ andC6H2(COO)44- featuring channel-like voids, which accomodate water molecules and(C6H10)(NH3)22+ cations compensating for the negative excess charge of the three-dimensionalframework. Thermogravimetric analysis in air showed that the dehydrated compound wasstable between 198 and 361 °C. Further decomposition yielded CoO.Zn[(C6H12)(NH3)2][C6H2(COO)4]·1/2H2O (2) was prepared analogously to 1 employing 1, 6-diaminohexane. Space group P21/n (no. 14), a = 1087.78(8), b = 1515.18(11), c = 1162.21(10)pm, β=96.249(7)°, V = 1.9042(3) nm3, Z = 4. Zn2+ is coordinated tetrahedrally like Co2+ byoxygen atoms of the pyromellitate anions (Zn—O 195.0(4) - 197.8(4)). The connection ofZn2+ with the anions leads similar to 1 to a three-dimensional framework with voidsaccomodating (C6H12)(NH3)22+-cations and water molecules. 2 was stable anhydrouslybetween approx. 120 and 340 °C, the further decomposition was completed at 700 °C yieldingZnO.

scholarly journals [Mn(H2O)2]4[HNC5H4(COO)]2[C6H2(COO)4]2·4H2O — A Three-dimensional Coordination Polymer with Guest Water Molecules in Channel-like Voids

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Aqueous Solution ◽  
Thermogravimetric Analysis ◽  
Coordination Polymer ◽  
Oxygen Atom ◽  
Single Crystals ◽  
Isonicotinic Acid ◽  
Three Dimensional ◽  
Water Molecules ◽  
Space Group ◽  
Distorted Octahedral

Single crystals of [Mn(H2O)2]4[HNC5H4(COO)]2[C6H2(COO)4]2·4H2O have been prepared in aqueous solution at 55 °C. Space group P-1 (no. 2), a = 999.7(2), b = 1314.4(2), c =1645.8(2) pm, α = 101.096(8)°, β = 92.796(14)°, γ = 96.03(2)°, V = 2.1053(5) nm3, Z = 2.There are four unique Mn2+ which are coordinated in a distorted, octahedral manner by twowater molecules, three oxygen atoms of the pyromellitate anions and one oxygen atom of isonicotinic acid (Mn—O 208.6(2) — 227.3(3) pm). The connection of Mn2+ and [C6H2(COO)4]4— yields a three-dimensional coordination polymer with two different, channel-like voids extending parallel to [110]. The first channel accomodates water molecules, the second channel is filled by isonicotinic acid molecules. Thermogravimetric analysis in air revealed that the loss of water of crystallisation occurs in two steps between 97 and 200 °C. The dehydrated sample was stable between 200 and 340 °C. Further decomposition yielded Mn3O4.

scholarly journals Cu2[Cu(H2O)4][(CH2)4(NH3)2][C6H2(COO)4]2·4H2O — A Three-Dimensional Coordination Polymer with Negativ Excess Charge and Channel-like Voids

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Aqueous Solution ◽  
Coordination Polymer ◽  
Single Crystals ◽  
Three Dimensional ◽  
Excess Charge ◽  
Ferromagnetic Coupling ◽  
Space Group ◽  
Exothermic Decomposition ◽  
Thermoanalytical Measurements

Triclinic single crystals of Cu2[Cu(H2O)4][(CH2)4(NH3)2][C6H2(COO)4]2·4H2O have beenprepared in aqueous solution at 55 °C. Space group P-1 (no. 2), a = 799.73(7), b = 977.43(8),c = 1086.27(9) pm, α = 87.194(7), β = 84.679(7), γ = 74.744(6)°, V = 0.81540(12) nm3, Z = 1.There are two unique Cu2+ with CN 4+1 (Cu(1)) and CN 4+2 (Cu(2)), respectively. The Cu-Odistances range from 197.4(2) to 214.9(2) pm (Cu(1)) and 191.6(2) to 240.1(4) pm (Cu(2)).There is a short Cu(1)-Cu(1) contact of 267.02(6) pm. A three-dimensional coordinationpolymer with negative excess charge and channel-like voids extending parallel to [-110] ismade up by Cu2+ and [C6H2(COO)4]4-. These voids accomodate [(CH2)4(NH3)2]2+ and watermolecules, which are not coordinated to Cu2+. Thermoanalytical measurements in airindicated a step-wise loss of water of crystallization commencing at 63 °C, which is finishedat approx. 250 °C followed by an exothermic decomposition yielding CuO. The Cu(1) pairsshow anti-ferromagnetic coupling.

scholarly journals Cd(H2O)2[C6H3(COO)2(COOH)] - A Two-Dimensional Coordination Polymer with Cationexchanger Features

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Coordination Polymer ◽  
Single Crystals ◽  
Equatorial Plane ◽  
Water Molecules ◽  
Two Dimensional ◽  
Space Group ◽  
Anion Form ◽  
Oxygen Atoms

Monoclinic single crystals of Cd(H2O)2[C6H3(COO)2(COOH)] have been prepared in aqueoussolution at 80 °C. Space group C2/c (no. 15), a = 1973.0(2), b = 910.74(7), c = 1336.81(10)pm, β = 117.897(8)°, V = 2.1230(3) nm3, Z = 8. Cd2+ is coordinated in a moderately distortedpentagonal bipyramidal fashion by five oxygen atoms stemming from themonohydrogentrimesinate anions in the equatorial plane and two water molecules in theapical positions (Cd–O 224.0(2) – 255.0(2) pm). The connection of Cd2+ with[C6H3(COO)2(COOH)]2− yields a two-dimensional coordination polymer. The atoms of themonohydrogentrimesinate anion form in good approximation a common plane.Thermogravimetric analysis in air shows that the dehydrated compound is stable up to 390°C. Further decomposition yields CdO.

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 Novel Three-Dimensional Copper(II) 1,2- Ethylenediphosphonate Framework with Channel-like Voids

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Thermal Treatment ◽  
Coordination Polymer ◽  
Single Crystals ◽  
Magnetic Measurements ◽  
Three Dimensional ◽  
Ambient Air ◽  
Water Molecules ◽  
The Novel ◽  
Square Planar ◽  
Superexchange Coupling

Turquoise monoclinic single crystals of the novel three-dimensional Cu2[μ8-O3P(CH2)2PO3)].3.2H2O coordination polymer have been prepared using the silica gelmethod. Space group C2/m (no. 12) with a = 1483.6(2), b = 668.44(8), c = 436.30(6) pm, beta =93.28(2)°. The Cu2+ cation is coordinated by four oxygen atoms stemming from the 1,2-ethylenediphosphonate dianions in a square planar manner and two water molecules in theaxial positions. The connection between the Cu2+ cations and the [PO3C] units from the 1,2-ethylenediphosphonate dianions leads to layers parallel to (100), which are linked by theethylene groups to a three-dimensional framework with channel-like voids. The voidsaccommodate water molecules not bound to Cu2+ and extend parallel along [001] with anopening of about 550 260 pm. Magnetic measurements reveal an antiferromagneticbehaviour due to a superexchange coupling between Cu2+ ions through an oxygen bridge. TheUV-Vis spectrum reveals three dd transition bands at 694, 774, and 918 nm. The compoundcan be fully dehydrated by thermal treatment and rehydrated by storage in ambient air.

scholarly journals Synthesis and crystal structure of NaCuIn(PO4)2

2020 ◽  
Vol 76 (3) ◽  
pp. 366-369
Author(s):  
Elhassan Benhsina ◽  
Jamal Khmiyas ◽  
Said Ouaatta ◽  
Abderrazzak Assani ◽  
Mohamed Saadi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Three Dimensional ◽  
Atmospheric Conditions ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
Sodium Cations ◽  
Oxygen Atoms

Single crystals of sodium copper(II) indium bis[phosphate(V)], NaCuIn(PO4)2, were grown from the melt under atmospheric conditions. The title phosphate crystallizes in the space group P21/n and is isotypic with KCuFe(PO4)2. In the crystal, two [CuO5] trigonal bipyramids share an edge to form a dimer [Cu2O8] that is connected to two PO4 tetrahedra. The obtained [Cu2P2O12] units are interconnected through vertices to form sheets that are sandwiched between undulating layers resulting from the junction of PO4 tetrahedra and [InO6] octahedra. The two types of layers are alternately stacked along [101] and are joined into a three-dimensional framework through vertex- and edge-sharing, leaving channels parallel to the stacking direction. The channels host the sodium cations that are surrounded by four oxygen atoms in form of a distorted disphenoid.

Die Kristallstruktur von Zinkformiat-Dihydrat

1977 ◽  
Vol 145 (5-6) ◽  
Author(s):  
N. Burger ◽  
H. Fuess
Keyword(s):  
Hydrogen Bonding ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Water Molecules ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Three Dimensional Structure ◽  
Oxygen Atoms

AbstractZinc formate cristallizes isomorphous to the formates of Mg, Sr, Cd, Mn and Ni in the monoclinic space groupThe structure has been refined including an isotropic extinction correction toThe octahedra of the two nonequivalent zinc atoms are slightly distorted. Zn(l) in (000) is surrounded by six oxygen atoms of the formate groups [distances Zn(l)–O = 2.071 Å–2.145 Å]; the octahedron of Zn(2) in (½½0) consists of the oxygen atoms of the two formate groups and two water molecules [distances Zn(2)–O = 2.053 Å–2.165 Å].The three-dimensional structure is stabilized by hydrogen bonding between formate groups and water molecules.

Synthese und Kristallstruktur von Europium(III)-diacetatotriaquo-chlorid, [Eu(CH3COO)2(H2O)3]Cl / Synthesis and Crystal Structure of Europium(III)-diacetatotriaquo-chloride, [Eu(CH3COO)2(H2O)3]Cl

1989 ◽  
Vol 44 (9) ◽  
pp. 1007-1010 ◽  
Author(s):  
Thomas Schleid ◽  
Gerd Meyer
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
Chloride Ions ◽  
Water Molecules ◽  
Monoclinic System ◽  
Synthesis And Crystal Structure ◽  
Space Group ◽  
Oxygen Atoms

Colourless single crystals of [Eu(CH3COO)2(H2O)3]Cl are obtained at about 5°C from a solution of EuCl3 · 6 H2O in a mixture of acetone, tetrahydrofurane and acetanhydride (1:1:2) to which a small amount of water had been added. [Eu(CH3COO)2(H2O)3]Cl crystallizes in the monoclinic system, space group P21/n (No. 14), a = 786.19(5), b = 791.86(5), c = 1768.81(13) pm; β = 98.235(6)°, R = 0.025, Rw = 0.021, Z = 4. Eu3+ is in nine-coordinate surrounding of O2-, three of which belong to water molecules and six to acetate anions (two bidentate and two monodentate). Cationic chains of the composition [Eu(CH3COO)2(H2O)3]+ are formed through further connection via acetate-oxygen atoms. These chains are stacked hexagonally parallel [100] and held together by “lonesome” Cl- anions. The chloride ions are surrounded by 4+1 aquo ligands.

Unendliche Y2(H2O)10[C6(COO)6]-Ketten in Y2[C6(COO)6] · 14H2O / Infinite Chains of Y2(H2O)10[C6(COO)6] in Y2[C6(COO)6] · 14 H2O

1992 ◽  
Vol 47 (11) ◽  
pp. 1561-1564 ◽  
Author(s):  
Christian Robl ◽  
Stephanie Hentschel
Keyword(s):  
Hydrogen Bonds ◽  
Single Crystals ◽  
Silica Gel ◽  
Water Molecules ◽  
Space Group ◽  
Aqueous Silica ◽  
Oxygen Atoms

Colourless monoclinic single crystals of Y2[C6(COO)6]· 14H2O were grown in aqueous silica gel (space group P21/n, a = 847.5(1), b = 923.4(2), c = 1632.0(3) pm, β = 100.33(1)°, Ζ = 2, 223 parameters, 1784 reflections, Rg = 0.0357). Y3+ is coordinated by 5 water molecules and 3 oxygen atoms of the mellitate anion in a dodecahedral fashion. Y3+ and [C6(COO)6]6- ions are linked by coordinative bonds, yielding infinite chains of composition Y2(H2O)10[C6(COO)6] extending parallel to [100]. Hydrogen bonds connect adjacent chains.

The crystal structures of sjögrenite and pyroaurite

1967 ◽  
Vol 36 (280) ◽  
pp. 465-479 ◽  
Author(s):  
L. Ingram ◽  
H. F. W. Taylor
Keyword(s):  
Crystal Structures ◽  
Three Dimensional ◽  
Water Molecules ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Approximate Composition ◽  
Oxygen Atoms

SummaryThe crystal structures of sjögrenite and pyroaurite, two stacking modifications of approximate composition Mg6Fe2(OH)16(CO3).4H2O, have been determined by X-ray diffraction using three-dimensional methods. Sjögrenite is hexagonal, with a 3·13, c 15·66 Å, space group P63/mmc , Z = ¼; pyroaurite is rhombohedral, with aH 3·13, cH 23·49 Å, space group R3̄m or R3m, Z = ⅜. Both structures are based on brucite-like layers, with magnesium and iron distributed among the octahedral positions. The cations appear to be largely disordered, although ordered regions may occur in some crystals. Between the brucite-like layers are the water molecules and carbonate groups. These are statistically arranged, with their oxygen atoms distributed among a larger number of possible sites.

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