scholarly journals Novel Structures and Magnetic Properties of Two [Mn2] Complexes with 2,4-di-2-pyridyl-2,4-pentanediol as the Ligand

2019 ◽  
Vol 5 (3) ◽  
pp. 43
Author(s):  
En-Che Yang ◽  
Yu-Ying Chang ◽  
Shi-Yi Huang ◽  
Ling-Xuan Hong ◽  
Gene-Hsiang Lee ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Property ◽  
The Other ◽  
Antiferromagnetic Coupling ◽  
Monoclinic Space Group ◽  
Ferromagnetic Coupling ◽  
Manganese Ions ◽  
Space Group ◽  
Metal Metal ◽  
Novel Structures

Two ligands, 2,4-di-2-pyridyl-2,4-pentanediol (rD and mD), were employed to synthesize two Mn2 complexes, [Mn2(rD)2Br2] (1) and [Mn2(mD)2(H2O)2]Br2 (2). Compound 1 crystallized in a tetragonal space group, P41212, with a novel hamburger shaped structure. A detailed study indicated that compound 1 did not contain a metal–metal bond, but antiferromagnetic coupling was observed between the Mn(III) ions. Compound 2 crystallized in a monoclinic space group, C2/c, with one Mn(II) and the other with Mn(IV). The two manganese ions were bridged by two alkoxide ligands, resulting in ferromagnetic coupling. Magnetic property studies confirm the above assignments.

One-dimensional ribbons of solvated Ag sulfonates

1999 ◽  
Vol 77 (3) ◽  
pp. 313-318 ◽  
Author(s):  
George KH Shimizu ◽  
Gary D Enright ◽  
Gabriela S Rego ◽  
John A Ripmeester
Keyword(s):  
Coordination Polymer ◽  
Single Crystal ◽  
The Other ◽  
Monoclinic Space Group ◽  
Triclinic Space Group ◽  
Space Group ◽  
One Dimensional ◽  
X Ray ◽  
Structure Determinations

Single crystal X-ray structure determinations of two solvated silver sulfonates have been obtained and these compounds have been shown to adopt infinite one-dimensional motifs. {AgOTs(MeCN)}[Formula: see text] (OTs = p-toluenesulfonate) crystallizes in the monoclinic space group, P21, a = 8.4278(5) Å, b = 5.7413(3) Å, c = 12.1057(7) Å, β = 109.24(1)°. {Ag(NDSA)(MeCN)2(H3O)(H2O)2}[Formula: see text] (NDSA = 1,5-naphthalenedisulfonate) crystallizes in the triclinic space group, P[Formula: see text], a = 8.3407(4) Å, b = 10.4374(5) Å, c = 12.3399(6) Å, α = 101.941(8)°, β = 109.24(1)°, γ = 102.190(8)°. Despite one compound containing a monosulfonate and the other a disulfonate, both complexes form infinite one-dimensional arrays.Key words: silver, sulfonates, coordination polymer.

Structure and Magnetic Properties of a Dinuclear Complex with Iron(III) in Octahedral and Pyramidal Coordination

1994 ◽  
Vol 49 (9) ◽  
pp. 1239-1242 ◽  
Author(s):  
Ayhan Elmali ◽  
Yalcin Elerman ◽  
Ingrid Svoboda ◽  
Hartmut Fuess ◽  
Klaus Griesar ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Dinuclear Complex ◽  
Monoclinic Space Group ◽  
Temperature Dependent ◽  
Space Group ◽  
Binuclear Unit

[FeL(MeOH)Cl]2 (L = N-(2-hydroxyphenyl)salicylaldimine) was synthesized and its crystal structure determined, [C27H20N 2O5Cl2Fe2], monoclinic, space group P21/c, a = 9.528(1), b = 7.684(1), c = 18.365(2) Å, β = 109.83(1)°, V = 1264.8 Å3, Z = 2. Two identical [FeL(MeOH)Cl] fragments, related by an inversion centre, are combined by the two bridging O atoms, to form a binuclear unit. The iron(III) centers are separated by 3.163(2) Å and weakly antiferromagnetically coupled (J = -8 .0 (1 ) cm-1), which follows from temperature - dependent magnetic susceptibility measurements in the range 4.2 to 288 K. The effective magnetic moment per iron(III) is μeff = 7.4 μB at 288 K

Monoclinic sphere packings. III. Trivariant lattice complexes of P2/c and P21/c

2019 ◽  
Vol 75 (2) ◽  
pp. 325-335
Author(s):  
Heidrun Sowa
Keyword(s):  
Sphere Packing ◽  
The Other ◽  
Monoclinic Space Group ◽  
Sphere Packings ◽  
Homogeneous Sphere ◽  
Space Group

All homogeneous sphere packings were derived that refer to the trivariant lattice complexes of monoclinic space-group types P2/c and P21/c. In total, sphere packings of 55 types have been found. The maximal inherent symmetry is monoclinic for 17 types while the other types comprise at least one sphere packing with cubic (four cases), hexagonal (six cases), tetragonal (eight cases) or orthorhombic (20 cases) symmetry.

Synthesis, structure, and magnetic properties of diphenylphosphinates of cobalt(II) and manganese(II). The crystal and molecular structures of the γ forms of poly-bis(μ-diphenylphosphinato)cobalt(II) and manganese(II)

1991 ◽  
Vol 69 (2) ◽  
pp. 277-285 ◽  
Author(s):  
Jing-Long Du ◽  
Steven J. Rettig ◽  
Robert C. Thompson ◽  
James Trotter
Keyword(s):  
Magnetic Properties ◽  
Heavy Atom ◽  
Molecular Structures ◽  
Antiferromagnetic Coupling ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Lattice Constants ◽  
Linear Chains

The synthesis of the β and γ forms of M(Ph2PO2)2 where M = Co and Mn are described and the compounds are characterized by infrared spectroscopy, differential scanning calorimetry, X-ray powder diffraction, and low-temperature (2–80 K) magnetic susceptibility studies. Single crystal X-ray diffraction studies are reported on the γ forms. Crystals of the γ forms of poly-bis(μ-diphenylphosphinato)cobalt(II) and poly-bis(μ-diphenylphosphinato)manganese(II) are isomorphous, crystallizing with 4 formula units per unit-cell in the monoclinic space group P21/c. Lattice constants are a = 8.080(2), 8.161(1), b = 23.550(6), 23.751(1), c = 11.726(3), 11.6946(6) Ǻ, and β = 92.88(2), 93.026(8)° for the Co and Mn derivatives respectively. The structures were solved by heavy atom methods and were refined by full-matrix least-squares procedures to R = 0.039 and 0.045 for 4041 and 2878 reflections with I ≥ 3σ(I), respectively. Both crystal structures consist of double phosphinate-bridged chain polymers containing tetrahedrally coordinated metal atoms: Co—O = 1.950(2)–1.963(2) Ǻ, O—Co—O = 104.81(8)–117.77(9)°, Mn—O = 2.016(3)–2.033(3) Ǻ, O—Mn—O = 103.2(1)–114.7(1)°. All four compounds exhibit antiferromagnetic coupling and magnetic susceptibilities have been analyzed according to two Heisenberg models for linear chains of metal ions with S = 3/2 for cobalt and S = 5/2 for manganese. The Weng model (with values for the Wagner and Friedberg model in parentheses) gives –J = 0.25 (0.26) cm−1 and 0.55 (0.60) cm−1 for the β and γ forms, respectively, of Co(Ph2PO2)2, and 0.34 (0.36) cm−1 and 0.17 (0.17) cm−1 for the β and γ forms, respectively, of Mn(Ph2PO2)2. Key words: crystal structure, diphenylphosphinates of cobalt(II) and manganese(II), magnetic properties.

Organoamido- and Aryloxo-lanthanoids. X. Tris(η2-3,5-di-t-butylpyrazolato)lanthanoid(III) Complexes and the X-Ray Crystal Structure of Er(η2-But2pz)3(thf)2

1994 ◽  
Vol 47 (7) ◽  
pp. 1223 ◽  
Author(s):  
JE Cosgriff ◽  
GB Deacon ◽  
BM Gatehouse ◽  
H Hemling ◽  
H Schumann
Keyword(s):  
Crystal Structure ◽  
Triphenylphosphine Oxide ◽  
The Other ◽  
Monoclinic Space Group ◽  
Space Group ◽  
X Ray ◽  
Trigonal Bipyramidal ◽  
Oxygen Atoms

The complexes Ln (But2pz)3( thf )2 ( Ln = Y, La, Pr, Nd , Sm, Gd, Dy , Er , Yb, Lu; But2pz- = 3,5-di-t-butylpyrazolate; thf = tetrahydrofuran ), and [ Ln (But2pz)3(OPPh3)2].( dme )n ( Ln = La, n = ⅔ ; Ln = Er , n = 1; dme = 1,2-dimethoxyethane) have been prepared by reaction of the lanthanoid metal with bis ( pentafluorophenyl )mercury and the corresponding pyrazole in either thf , or in dme in the presence of triphenylphosphine oxide. The X-ray crystal structure of Er (η2-But2pz)3( thf )2 [monoclinic, space group P21 (No. 4), a 9.738(4), b 19.602(4), c 11.636(4) Ǻ, β 99.42(3)°, R 0.0374 for 3667 observed reflections] shows the complex to be an eight-coordinate monomer with three chelating But2pz ligands . The arrangement of centres ( Cen ) of the N-N bonds of the But2pz ligands [< Er -N> 2.336 Ǻ; Cen-Er-Cen 140.1(4)°, 110.3(4)° and 109.6(4)°] and the thf oxygen atoms [< Er -O> 2.351 Ǻ; O- Er -O 140.1(4)°] is intermediate between trigonal bipyramidal and square pyramidal. The other Ln (But2pz)3( thf )2 complexes and Ln (But2pz)3(OPPh3)2 are considered to have similar structures.

Dithioquadratato-Komplexe von Kupfer(II) und Kupfer(I). / Dithiosquarate Complexes of Copper(II) and Copper(I).

1990 ◽  
Vol 45 (4) ◽  
pp. 490-496 ◽  
Author(s):  
Ralf Krause ◽  
Rainer Mattes
Keyword(s):  
Aqueous Solutions ◽  
Antiferromagnetic Coupling ◽  
Monoclinic Space Group ◽  
Crystal Data ◽  
Space Group ◽  
Ferromagnetic Behaviour ◽  
A Chain

From aqueous solutions of potassium dithiosquarate and bis(ethylenediamino)copper(II) sulfate the following compounds have been obtained: [CuII(en)2][CuII(C4O2S2)2] (2) and [CuII(en)2(H2O)]2[Cu4I(C4O2S2)4] · 2 H2O (3). Their structures have been determined: Crystal data, 2, monoclinic, space group C 2/c, a = 1914.5(6), b = 823.0(1), c = 1669.5(5) pm, β = 133.23(1)°, Ζ = 4; 1809 reflections, R = 0.024. 3, triclinic, a = 779.2(3), b = 958.7(4), c = 1478.8(4) pm, α = 82.34(3), β = 82.68(2), γ = 73.47(3)°, Ζ = 1; 3376 reflections, R = 0.045. 2 contains infinite chains of centrosymmetrical [Cu(en)2]2+ cations and bisphenoidal [Cu(C4O2S2)2]2- anions. 2 shows ferromagnetic behaviour above 75 K. At lower temperatures antiferromagnetic coupling between the chains dominates. 3 contains isolated [Co(en)2H2O]2+ cations and tetrameric [Cu(C4O2S2)]- anions. The anion consists of a chain of tetrahedrally and trigonally coordinated Cu(I) atoms with short Cu · · · Cu distances of 255.2( 1 ) and 257.9( 1 ) pm. The dithiosquarate ligands are stacked in pairs.

X-Ray Structure and Magnetic Properties of the Tetracupferronato-bis(μ-methoxy)-diiron(III) Complex

1995 ◽  
Vol 50 (11) ◽  
pp. 1587-1590 ◽  
Author(s):  
Yalcin Elerman ◽  
Mehmet Kabak ◽  
Ingrid Svoboda ◽  
Hartmut Fuess ◽  
Klaus Griesar ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Exchange Interaction ◽  
Monoclinic Space Group ◽  
Antiferromagnetic Exchange ◽  
Temperature Dependent ◽  
Space Group ◽  
X Ray ◽  
Antiferromagnetic Exchange Interaction

The tetracupferronato-bis(μ-methoxy)-diiron(III) complex has been synthesized in acetonitrile and its crystal structure determined. C26H26N8O10Fe2, monoclinic, space group C2/c, a =18.425(3), b = 12.999(2), c = 15.046(3) Å, β = 124.66(2)°,V = 2964(1) Å3, Z = 4, wR(2) = 0.097 from 1491 reflections (F2). Two iron(III) atoms are at special positions in six-fold coordination, bridged by O with a Fe-O-Fe angle of 102.4(1)° and a distance between two iron(III) centers of 3.075(1) Å. Temperature-dependent magnetic susceptibility measurements reveal a antiferromagnetic exchange interaction (J = -14 cm-1) between the iron(III) centers.

Structure and Magnetic Properties of a (μ-Oxo)diiron(III) Complex

1993 ◽  
Vol 48 (3) ◽  
pp. 313-317 ◽  
Author(s):  
Ayhan Elmali ◽  
Yalcin Elerman ◽  
Ingrid Svoboda ◽  
Hartmut Fuess ◽  
Klaus Griesar ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Oxygen Atom ◽  
Monoclinic Space Group ◽  
Temperature Dependent ◽  
Space Group

μ-Oxo-bis[N ,N '-o-phenylene-di(salicylaldiminato)iron(III)] was synthesized in dioxane solvent and its crystal structure determined. [C2OH14N ,OiFe]-,O · (C4H8O2), monoclinic, space group P21/ c ,a = 14.650(2), b = 18.990(1), c = 13.296(1) Å, β = 76.080(7), V = 3590.3 Å3, Z = 4. Two iron (III) atoms in square pyramidal pentacoordination are bridged by an oxygen atom with an Fe - O - Fe angle of 145 and a Fe-Fe distance of 3.409(1) Å. The iron (III) centers are antiferrommagnetically coupled (J = -9 8 .5 cm-1), as derived from temperature-dependent magnetic susceptibility measurements in the range 4.2 to 286.5 K.

trans-Tetraamminebis(hydrogensulfito)ruthenium(II), trans-[Ru(SO3H)2(NH3)4], a Structure with an Unexpected Rod Packing

1990 ◽  
Vol 45 (12) ◽  
pp. 1651-1656 ◽  
Author(s):  
Dietrich K. Breitinger ◽  
Roman Breiter
Keyword(s):  
Hydrogen Bonds ◽  
Experimental Error ◽  
The Other ◽  
Octahedral Complex ◽  
Monoclinic Space Group ◽  
Hexagonal Array ◽  
Space Group ◽  
Trans Influence ◽  
Packing Coefficient

trans-[Ru(SO3H)2(NH3)4], monoclinic, space group P21/n, Z =2, a = 619.4(3), b = 701.8(3), c = 1068.6(6) pm, β = 96.32(3)°. In the centrosymmetric octahedral complex the two independent Ru–N bonds are equal within experimental error (average Ru–N 214.0 pm). The rather short Ru–S bonds (227.6 pm) indicate a very weak trans-influence of the – SO3H ligand. Caused by the protonation, one of the S–O bonds in the –SO3H ligand is long (161.4 pm), the other two are short (mean 148.0 pm). The complex units are linked by pairs of O-H ··· O hydrogen bonds (268.9 pm) to form rods parallel b (symmetry (b) · T), which in turn are held together by N–H ··· O bonds in a pseudo-hexagonal array. A packing coefficient of 0.76 is estimated.

Solid State Coordination Chemistry of Pyridinedicarboxylic Acid Isomers. I Copper(II) Disodium Bis(pyridine-2,3- dicarboxylate) Octahydrate and Copper(II) Pyridine-3,4-dicarboxylate 3·5 Hydrate

1999 ◽  
Vol 52 (3) ◽  
pp. 205 ◽  
Author(s):  
Elsa E. Sileo ◽  
Daniel Vega ◽  
Mará T. Garland ◽  
Ricardo Baggio ◽  
Miguel A. Blesa
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Crystal Structures ◽  
Monoclinic Space Group ◽  
Thermal Dependence ◽  
Magnetic Susceptibility Data ◽  
Space Group ◽  
Susceptibility Data ◽  
Pyridinedicarboxylic Acid ◽  
State Coordination

The crystal structures of Na2Cu(2,3-pydc)2.8H2O (1) and Cu(3,4-pydc).3·5H2O (2) (pydc = pyridinedi- carboxylato) are presented. Compound (1) is monoclinic, space group C 2/c, with a 21·274(1), b 6 ·114(1), c 17·136(1) Å, β 101·62(1)°, Z 4, Dc 1·776 g cm-3 ; compound (2) is also monoclinic, space group P 21/c, with a 7·272(2), b 11·319(3), c 25·453(9) Å, β 90·58(1)°, Z 4, Dc 1·850 g cm-3 . Their stereochemistries are analysed, and compared with other copper(II) pyridine-2,6-dicarboxylates. Ligand constraints are shown to determine the crystal structures and the magnetic properties. Thermal dependence of magnetic susceptibility data and t.g., d.t.g. and d.t.a. measurements are also presented.

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