scholarly journals Synthesis and Structural Study of Tris(-pyrazolyl)hexakis(pyrazole)dicobalt(III) Nitrate

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Yifan Shi ◽  
Atta M. Arif ◽  
Richard D. Ernst
Keyword(s):  
Structural Study ◽  
Octahedral Coordination ◽  
Monoclinic Space Group ◽  
Nitrate Salt ◽  
Space Group ◽  
Metal Interaction ◽  
Metal Metal

The new (Hpyz)3Co(μ2-pyz)3Co complex has been isolated as the nitrate salt through a reaction of Co(II) nitrate, Hpyz (pyrazole), triethylamine, and oxygen. The salt crystallizes in the monoclinic space group P21/m with a = 12.5977(3) Å, b = 15.3387(4) Å, c = 14.0800(3) Å, β = 93.0868(15)°, and = 1.464 g/cm3 at 150(1) K. The complex, with pseudo-octahedral coordination about the equivalent cobalt centers, has shorter Co–N distances for the bridging anionic pyz ligands as compared to the neutral Hpyz ligands, with the averages being 1.918(2) and 1.966(4), respectively. The Co–Co separation is 3.568 Å, reflecting the absence of any significant metal-metal interaction.

scholarly journals Die Kristallstruktur des Silbertetrachloroaurats(III) AgAuCl4 und seine kristallchemische Verwandtschaft zum Rubidiumtetrachloroaurat(III) RbAuCl4 / The Crystal Structure of Silver Tetrachloroaurate(III) AgAuCl4 and its Crystal Chemical Relationship to the Rubidium Tetrachloroaurate(III) RbAuCl4

1977 ◽  
Vol 32 (7) ◽  
pp. 741-744 ◽  
Author(s):  
Walther Werner ◽  
Joachim Strähle
Keyword(s):  
Crystal Structure ◽  
Bond Length ◽  
Octahedral Coordination ◽  
Monoclinic Space Group ◽  
Crystal Chemical ◽  
Space Group ◽  
Square Planar ◽  
Cl Atoms

AgAuCl4 crystallizes in the monoclinic space group I2/c with Zi = 4. The crystal structure is built up by Ag+ cations and square planar AuCl4⁻ anions with Au-Cl bond length of 228 pm. The Ag+ ions have an octahedral coordination of Cl atoms. AgAuCl4 is topologically related to RbAuCl4.

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.

Synthese und Struktur von [Mo(CO)4(TeC6H5)]2 / Synthesis and Structure of [Mo(CO)4(TeC6H5)]2

1985 ◽  
Vol 40 (12) ◽  
pp. 1599-1602 ◽  
Author(s):  
Thomas Vogt ◽  
Joachim Strähle
Keyword(s):  
Main Product ◽  
Bond Angle ◽  
Lattice Parameters ◽  
Octahedral Coordination ◽  
Dinuclear Complexes ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Amorphous Precipitate

Abstract The reaction of Mo(CO)6 with Ph2Te2 in toluene yields a black amorphous precipitate of Mo„(TePh)3n-3(CO)6 (n ~ 4) as the main product besides smaller amounts of Mo2(CO)8(TePh)2 which can be obtained from the solution as black crystals. They crystallize in the monoclinic space group C2/c with the lattice parameters a = 1872.0 pm, b = 751.9 pm, c = 1741.6 pm, β = 103.14°, Z = 4. In the dinuclear complexes of symmetry Q the Mo atoms are bridged by two TePhligands. The octahedral coordination of each Mo atom is completed by four CO groups. Mo -Mo interaction is indicated by a distance of Mo-Mo = 311.4 pm and a small bond angle Mo - Te - Mo = 69.14°

scholarly journals Synthesis and Structural Study of the (N,N,N′,N′-Tetraethylethylenediamine)CdFe(CO)4 Dimer

2014 ◽  
Vol 2014 ◽  
pp. 1-5
Author(s):  
Torsten Kolb ◽  
Atta M. Arif ◽  
Richard D. Ernst
Keyword(s):  
Structural Study ◽  
Monoclinic Space Group ◽  
Inversion Center ◽  
Steric Interactions ◽  
Space Group ◽  
Carbonyl Ligands

The new [(teeda)CdFe(CO)4]2 complex has been isolated from the reaction of [(NH3)2CdFe(CO)4]n with tetraethylethylenediamine. Unlike previous structural reports of ligand adducts of [L2CdFe(CO)4]x complexes, which have all been trimeric species composed of six-membered Cd3Fe3 rings, the teeda complex crystallized as a dimer, analogous to [(2,2-bpy)ZnFe(CO)4]2. As in the zinc dimer, significant distortion arises from steric interactions between the axial carbonyl ligands on opposing iron centers. The complex sits on an inversion center, leading to two independent Cd–Fe distances, 2.7244(6) and 2.7433(6) Å, and crystallizes in the monoclinic space group P21/a with a = 14.8546(2) Å, b = 15.1647(3) Å, c = 15.5252(3) Å, β = 90.9517(12)°, and Dcalc = 1.719 g/cm3 at 150(1) K.

scholarly journals Synthesis and Structural Study of the Bis(ethylenediamine)CdFe(CO)4 Monomer

2014 ◽  
Vol 2014 ◽  
pp. 1-4
Author(s):  
Marcus Tofanelli ◽  
Atta M. Arif ◽  
Richard D. Ernst
Keyword(s):  
Structural Study ◽  
Iron Atom ◽  
Axial Position ◽  
Monoclinic Space Group ◽  
Cadmium Atom ◽  
Apical Position ◽  
Space Group ◽  
Trigonal Bipyramidal ◽  
Iron Coordination

The new (en)2CdFe(CO)4 complex has been isolated from the crystallization of [(en)CdFe(CO)4]x from ethylenediamine (en). The cadmium center bears square-pyramidal coordination, with the iron atom occupying the apical position. The iron coordination may be described either as trigonal bipyramidal, with the cadmium atom being in an axial position, or as monocapped (by cadmium) tetrahedral. The Cd-Fe distance was found to be 2.6250(2) Å. The complex crystallizes in the monoclinic space group P21/a with a=14.4137(3) Å, b=7.65740(10) Å, c=14.5465(2) Å, and β=119.4972(9)° at 150(1) K.

scholarly journals Die Kristallstruktur von 2.2'-Bipyridin-bis(brenzkatechyl)phosphoniiimhexafluorophosphat / Crystal Structure of 2,2'-Bipyridine-bis(o-phenylenedioxy)phosphonium Hexafluorophosphate

1978 ◽  
Vol 33 (6) ◽  
pp. 583-587 ◽  
Author(s):  
William S. Sheldrick ◽  
Alfred Schmidpeter ◽  
Thomas von Criegern
Keyword(s):  
Crystal Structure ◽  
Phosphorus Atom ◽  
Chelate Ring ◽  
Octahedral Coordination ◽  
Monoclinic Space Group ◽  
Ring Systems ◽  
Space Group ◽  
Bond Angles ◽  
Bond Lengths ◽  
Bipyridine Ligand

Abstract 2,2'-Bipyridine-bis(o-phenylenedioxy)phosphonium hexafluorophosphate crystallises in the monoclinic space group C2/c (Z = 8) with a = 18.654(4), b = 10.131(2), c = 24.344(4) Å, β = 99.53(4)°. The cationic phosphorus atom displays an octahedral coordination slightly distorted towards the tetrahedral one of an uncomplexed phosphonium center. The OPO bond angles are between 91.6 and 95.7(2)°, the NPN angle of the bipyridine chelate ring in contrast is only 81.7(2)°. The ring systems of the bipyridine ligand are inclined slightly to one another at an angle of 4.7°. The bond lengths to the cationic phosphorus are P - 0 1.668-1.672(3), P-N 1.896(4) and 1.898(4) Å. The hexafluorophosphate anion is disordered

Notizen: Über die Kristallstruktur von β-SCl3+SbCl6- und interionischen Wechselwirkungen in SCl3+-Salzen/The Crystal Structure of β-SCl3+SbCl6- and Interionic Interactions in SCl3+ Salts

1992 ◽  
Vol 47 (4) ◽  
pp. 594-596 ◽  
Author(s):  
Rolf Minkwitz ◽  
Andreas Kornath ◽  
Hans Preut
Keyword(s):  
Crystal Structure ◽  
Crystal Structures ◽  
Unit Cell ◽  
Octahedral Coordination ◽  
Monoclinic Space Group ◽  
Space Group ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Interionic Interactions

Chlorosulfonium hexachloroantimonate crystallizes in the monoclinic space group C 2/m with a = 1405.5(3) pm, b = 1055.1(2) pm , c = 882.2(2) pm, β = 110.05(3)° at 169 K with 4 formula units per unit cell. A distorted octahedral coordination around sulphur is formed by three S - C l bonds and three interionic sulphur chlorine contacts. The interionic interactions in SCl3+ salts of known crystal structures are discussed.

The structure of [Ir2(CO)2(μ-H)(μ-CO)(Ph2PCH2PPh2)2][BF4] and comparisons with its rhodium analogue and other related doubly bridged A-frames

1986 ◽  
Vol 64 (3) ◽  
pp. 464-469 ◽  
Author(s):  
Bruce R. Sutherland ◽  
Martin Cowie
Keyword(s):  
Solid State ◽  
Iridium Complex ◽  
Monoclinic Space Group ◽  
Diphosphine Ligands ◽  
Space Group ◽  
Coordination Sites ◽  
Metal Metal ◽  
Hydride Ligand

The structure of [Ir2(CO)2(μ-H)(μ-CO)(DPM)2][BF4] (DPM = Ph2PCH2PPh2) has been determined crystallographically. It crystallizes in the monoclinic space group P21/n (a = 13.7740(6) Å, b = 15.277(2) Å, c = 23.581(2) Å, β = 97.015(5)°, V = 4924.9 Å3, Z = 4) and on the basis of 6628 unique observations and variation of 272 parameters, the structure converged to R = 0.031 and Rw = 0.043. This metal–metal bonded complex is similar to its rhodium analogue, having the two essentially identical Ir centres bridged by the carbonyl, hydride, and two diphosphine ligands. The major difference between this compound and the rhodium species (in the solid state) relates to the orientation of the phenyl groups of the diphosphine ligands; in the iridium complex four of these groups block the sites adjacent to the bridging hydride ligand, whereas these sites are relatively unobstructed in the rhodium analogue. This difference may result in different coordination sites for substrate molecules and therefore in different chemistry.

A New Host Lattice Built of the Werner-Type Copper(I,II) Cyanide Complex Involving a Macrocyclic Ligand

1998 ◽  
Vol 63 (5) ◽  
pp. 622-627 ◽  
Author(s):  
Hidetaka Yuge ◽  
Takayoshi Soma ◽  
Takeshi Ken Miyamoto
Keyword(s):  
Macrocyclic Ligand ◽  
Host Lattice ◽  
Macrocyclic Complex ◽  
Monoclinic Space Group ◽  
Cyanide Complex ◽  
New Host ◽  
Space Group

Crystals of a new clathrate [CuII(hmtd)CuI(CN)3]·CH2Cl2 were afforded from a Me2CO-EtOH-CH2Cl2 solution of a macrocyclic complex CuII(hmtd)CuI(CN)3·2 H2O (hmtd = 5,7,7,12,14,14-hexamethyl- 1,4,8,11-tetraazacyclotetradeca- 4,11-diene). It crystallizes in the monoclinic space group P21/n, a = 7.936(5), b = 18.717(4), c = 17.783(6) Å, β = 98.55(4)°, Z = 4, R = 0.0558 for 1 870 reflections. Unprecedentedly, only one of the three nitrogen-ends of a CuI(CN)3 moiety is coordinated to the square-pyramidal Cu(II) center. The guest CH2Cl2 molecules are captured in the channel between the potlid-shaped [CuII(hmtd)CuI(CN)3] molecules.

scholarly journals Molekül- und Kristallstruktur von 1.1-Dimethylsilylentitanocendichlorid, (CH3)2Si(C5H4)2TiCl2 / Molecular and Crystal Structure of l,r-Dimethylsilylene Titanocene Dichloride, (CH3)2Si(C5H4)2TiCl2

1981 ◽  
Vol 36 (10) ◽  
pp. 1208-1210 ◽  
Author(s):  
Hartmut Köpf ◽  
Joachim Pickardt
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Structure Determination ◽  
Titanocene Dichloride ◽  
Molecular And Crystal Structure ◽  
Monoclinic Space Group ◽  
Crystal Data ◽  
Space Group ◽  
X Ray ◽  
Structural Dimensions

Abstract The molecular structure of the bridged [1]-titanocenophane 1,1'-dimethylsilylene titanocene dichloride, (CH3)2Si(C5H4)2TiCl2, has been investigated by an X-ray structure determination. Crystal data: monoclinic, space group C2/c, Z = 4, a = 1332.9(3), 6 = 988.7(3), c = 1068.9(3) pm, β = 113.43(2)°. The results are compared with the structural dimensions of similar compounds: 1,1'-methylene titanocene dichloride, CH2(C5H4)TiCl2, with the unbridged titanocene dichloride, (C5H5)2TiCl2 and the ethylene-bridged compound (CH2)2(C5H4)2TiCl2

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