Slow Magnetic Relaxation in Co(III)–Co(II) Mixed-Valence Dinuclear Complexes with a CoIIO5X (X = Cl, Br, NO3) Distorted-Octahedral Coordination Sphere

2013 ◽  
Vol 52 (8) ◽  
pp. 4554-4561 ◽  
Author(s):  
Vadapalli Chandrasekhar ◽  
Atanu Dey ◽  
Antonio J. Mota ◽  
Enrique Colacio
Keyword(s):  
Coordination Sphere ◽  
Magnetic Relaxation ◽  
Mixed Valence ◽  
Octahedral Coordination ◽  
Dinuclear Complexes ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Slow Magnetic Relaxation

A mixed-valence complex of cobalt based on 3-methoxysalicylaldoxime

2014 ◽  
Vol 70 (4) ◽  
pp. 364-367 ◽  
Author(s):  
Tiantian Yao ◽  
Jing Lu ◽  
Dacheng Li ◽  
Jianmin Dou
Keyword(s):  
Magnetic Properties ◽  
Cobalt Complex ◽  
Mixed Valence ◽  
Ethanol Solution ◽  
Octahedral Coordination ◽  
Supramolecular Network ◽  
Two Dimensional ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Mixed Valence Complex

A new tetranuclear mixed-valence cobalt complex, namely di-μ2-azido-diazidodiethanolbis{μ2-2-[(hydroxyimino)methyl]-6-methoxyphenolato}bis{μ3-6-methoxy-2-[(oxidoimino)methyl]phenolato}dicobalt(II)dicobalt(III) ethanol disolvate, [CoII2CoIII2(C8H7NO3)2(C8H8NO3)2(N3)4(C2H5OH)2]·2C2H5OH, has been synthesized by the reaction of Co(OAc)2·4H2O (OAc is acetate) with 3-methoxysalicylaldoxime (H2mosao) in an ethanol solution. In the complex, the four Co cations all display distorted octahedral coordination environments and they are bridged by two κ2,κ1,κ1;μ3-mosao2−ligands, two κ2,κ2;μ2-Hmosao−ligands and two μ2-N3−anions to form a tetranuclear [Co4N4O4] cluster. Adjacent clusters are connected through weak C—H...N and C—H...O interactions, resulting in a two-dimensional supramolecular network parallel to theacplane. The magnetic properties of the complex have also been studied.

scholarly journals (3-Methylbenzonitrile-1κN)-cis-tetrakis(μ-N-phenylacetamidato)-1:2κ4N:O;1:2κ4O:N-dirhodium(II)(Rh—Rh)

2014 ◽  
Vol 70 (8) ◽  
pp. m304-m304 ◽  
Author(s):  
Cassandra T. Eagle ◽  
Fredricka Quarshie ◽  
Kevin M. Cook
Keyword(s):  
Bond Length ◽  
Coordination Sphere ◽  
Title Compound ◽  
Mirror Symmetry ◽  
Bond Angle ◽  
Complex Molecule ◽  
Octahedral Coordination ◽  
Torsion Angles ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral

The complex molecule of the title compound, [Rh2{N(C6H5)COCH3}4(NCC7H7)], has crystallographically-imposed mirror symmetry. The four acetamide ligands bridging the dirhodium core are arranged in a 2,2-cismanner with two N atoms and two O atoms coordinating to the unique RhIIatomcisto one another. The Neq—Rh—Rh—Oeqtorsion angles on the acetamide bridge are 0.75 (7) and 1.99 (9)°. The axial nitrile ligand completes the distorted octahedral coordination sphere of one RhIIatom and shows a nonlinear coordination, with an Rh—N—C bond angle of 162.8 (5)°; the N—C bond length is 1.154 (7) Å.

scholarly journals Crystal structure of chlorido(dimethyl sulfoxide-κS)bis[4-(pyridin-2-yl)benzaldehyde-κ3C2,N]iridium(III) acetonitrile monosolvate

2017 ◽  
Vol 73 (9) ◽  
pp. 1279-1281 ◽  
Author(s):  
Andrew J. Peloquin ◽  
Madelyn B. Smith ◽  
Gary J. Balaich ◽  
Scott T. Iacono
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Dimethyl Sulfoxide ◽  
Coordination Sphere ◽  
Title Compound ◽  
Octahedral Coordination ◽  
Distorted Octahedral Coordination ◽  
Hydrogen Bonding Interactions ◽  
Distorted Octahedral ◽  
Chloride Ligand

The title compound, [IrCl(C12H8NO)2{(CH3)2SO}]·H3CCN or [IrCl(fppy)2(DMSO)]·H3CCN [where fppy is 4-(pyridin-2-yl)benzaldehyde and DMSO is dimethyl sulfoxide], is a mononuclear iridium(III) complex including two fppy ligands, a sulfur-coordinating DMSO ligand, and one terminal chloride ligand that define a distorted octahedral coordination sphere. The complex crystallizes from 1:1 DMSO–acetonitrile as an acetonitrile solvate. In the crystal, weak C—H...O and C—H...N hydrogen-bonding interactions between adjacent complexes and between the acetonitrile solvent and the complex consolidate the packing.

scholarly journals Bis{2-[bis(3,5-dimethyl-1H-pyrazol-1-yl-κN 2)methyl]pyridine-κN}cobalt(II) dinitrate

2012 ◽  
Vol 68 (6) ◽  
pp. m857-m857 ◽  
Author(s):  
Chao-Hu Xiao ◽  
Xue-Yan Song ◽  
Zan Sun ◽  
Ping Cao ◽  
Ting Pang
Keyword(s):  
Coordination Sphere ◽  
Rotation Axis ◽  
Title Complex ◽  
Octahedral Coordination ◽  
Distorted Octahedral Coordination ◽  
Pyridine Ligands ◽  
Distorted Octahedral ◽  
Methyl Pyridine

The central CoII ion in the title complex, [Co(C16H19N5)2](NO3)2, is located on a twofold rotation axis and has a slightly distorted octahedral coordination sphere. It is bonded to six N atoms from two 2-[bis(3,5-dimethyl-1H-pyrazol-1-yl)methyl]pyridine ligands. In the crystal, molecules are linked by weak C—H...O interactions.

scholarly journals trans-Diaquabis(1,1,1,5,5,5-hexafluoropentane-2,4-dionato-κ2O,O′)cobalt(II) dihydrate

IUCrData ◽  
2017 ◽  
Vol 2 (1) ◽  
Author(s):  
Takumi Tominaga ◽  
Tomoyuki Mochida
Keyword(s):  
Hydrogen Bonds ◽  
Coordination Sphere ◽  
Title Compound ◽  
Octahedral Coordination ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral

The CoIIatom in the mononuclear title compound, [Co(C5HF6O2)2(H2O)2]·2H2O, is situated on an inversion centre and exhibits a slightly distorted octahedral coordination sphere. In the crystal, molecules are arranged in layers parallel to (100), held together by O—H...O and O—H...F hydrogen bonds.

Calcium-bis { [tris(trimethylsilyl)silyl]tellanid } · 4 THF-Synthese, spektroskopische Charakterisierung und Struktur / Calcium-bis{[tris(trimethylsilyl)silyl]tellanide} · 4THF-Synthesis, Spectroscopic Characterization and Structure

1992 ◽  
Vol 47 (9) ◽  
pp. 1225-1232 ◽  
Author(s):  
Gerd Becker ◽  
Karl Wilhelm Klinkhammer ◽  
Wolfgang Schwarz ◽  
Matthias Westerhausen ◽  
Thomas Hildenbrand
Keyword(s):  
Coordination Sphere ◽  
Structure Determination ◽  
Spectroscopic Characterization ◽  
Octahedral Coordination ◽  
Trans Position ◽  
Calcium Atom ◽  
X Ray ◽  
H Nmr ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral

Calcium bis{[tris(trimethylsilyl)silyl]tellanide} · 4THF is obtained by metallation of [tris(trimethylsilyl)silyl]tellane using dimeric calcium bis[bis(trimethylsilyl)amide] in toluene, followed by recrystallisation from tetrahydrofuran. The compound is characterized by a remarkable highfield shift of the 125Te{1H}-NMR resonance (-2204 ppm vs. Me2Te). The X-ray structure determination (triclinic, P1; Z = 1; a = 1042.6(2), b = 995.7(2), c = 1379.6(3) pm; α = 90.06(2), β = 92.76(2), γ = 94,03(2)° at -100 °C) shows a distorted octahedral coordination sphere of the calcium atom (Ca-Te 319; Ca-O 236 and 241 pm). The two [tris(trimethylsilyl)silyl]-tellanide ligands are in a trans position; the angle Ca-Te-Si is widened to 129°.

scholarly journals Bis(tetraphenylarsonium) hexachloridozirconate(IV) acetonitrile tetrasolvate

IUCrData ◽  
2018 ◽  
Vol 3 (4) ◽  
Author(s):  
Rosendo Borjas ◽  
Samundeeswari Mariappan Balasekaran ◽  
Frederic Poineau
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Coordination Sphere ◽  
Octahedral Coordination ◽  
Experimental Procedure ◽  
Bond Lengths ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral

The bis(tetraphenylarsonium) hexachloridozirconate(IV) salt, (AsPh4)2[ZrCl6] (Ph = C6H5), was prepared more than 25 years ago [Esmadi & Sutcliffe (1991). Indian J. Chem. 30 A, 99–101], but its crystal structure was never reported. By following a similar experimental procedure, the compound was synthesized and its crystal structure was investigated as a acetonitrile tetrasolvate, (As(C6H5)4)2[ZrCl6]·4CH3CN, by single-crystal X–ray diffraction. The [ZrCl6]2− anion adopts a slightly distorted octahedral coordination sphere, with Zr—Cl bond lengths of 2.4586 (6), 2.4723 (6), and 2.4818 (5) Å, and Cl—Zr—Cl angles ranging from 89.602 (19) to 90.397 (19)°.

scholarly journals Crystal structure oftrans-aqua(perchlorato-κO)bis(propane-1,3-diamine-κ2N,N′)copper(II) perchlorate

2014 ◽  
Vol 70 (11) ◽  
pp. 438-440
Author(s):  
J. Govindaraj ◽  
K. Rajkumar ◽  
A. S. Ganeshraja ◽  
K. Anbalagan ◽  
A. SubbiahPandi
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Coordination Sphere ◽  
Equatorial Plane ◽  
Title Compound ◽  
Octahedral Coordination ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Diamine Ligands

In the title compound, [Cu(ClO4)(C3H10N2)2(H2O)]ClO4, the CuIIatom has a distorted octahedral coordination sphere and is coordinated by the N atoms of two propane-1,3-diamine ligands in the equatorial plane. The axial positions are occupied by a water O atom and an O atom of a disordered perchlorate anion [occupancy ratio 0.631 (9):0.369 (9)]. In the crystal, the various components are linkedviaO—H...O, N—H...O and C—H...O hydrogen bonds, forming sheets lying parallel to (001).

scholarly journals Crystal structure of dichlorido[2-(1H-imidazol-2-yl-κN3)imidazolato-κN]bis(tri-n-butylphosphane-κP)rhodium(III)

2014 ◽  
Vol 70 (11) ◽  
pp. 362-364
Author(s):  
Jin-Long ◽  
Masahiro Ebihara
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Coordination Sphere ◽  
Title Compound ◽  
Chloride Ions ◽  
Octahedral Coordination ◽  
Distorted Octahedral Coordination ◽  
Distorted Octahedral ◽  
Complex Forms ◽  
Related Complex

In the title compound, [Rh(C6H5N4)Cl2(C12H27P)2], the RhIIIion is chelated by the singly deprotonated 2,2′-biimidazolate (Hbim−) ligand and coordinated by two chloride ions and two tri-n-butylphosphane ligands. The chloride ions and N atoms of the Hbim−ligand lie in a plane where the sum ofX—Rh—Xangles betweencissites is 360°. The phosphane ligands occupy the sites perpendicular to the plane, completing the overall distorted octahedral coordination sphere. The complex forms a self-complementary hydrogen-bonded dimer with the inversion-related complex through N—H...N hydrogen bonds.

scholarly journals Bis[1-phenyl-3-(1H-1,2,4-triazol-1-yl-κN4)propan-1-one]bis(thiocyanato-κN)copper(II)

2012 ◽  
Vol 68 (8) ◽  
pp. m1115-m1115
Author(s):  
Hua Cai ◽  
Ying Guo ◽  
Jian-Gang Li
Keyword(s):  
Hydrogen Bonds ◽  
Coordination Sphere ◽  
Title Compound ◽  
Octahedral Coordination ◽  
Planar Geometry ◽  
Inversion Center ◽  
Distorted Octahedral Coordination ◽  
Square Planar ◽  
Distorted Octahedral

The title compound, [Cu(NCS)2(C11H11N3O)2], contains two independent CuIIatoms. Each CuIIatom, lying on an inversion center, is coordinated by two N atoms from two NCS−anions and two N atoms from two monodentate 1-phenyl-3-(1H-1,2,4-triazol-1-yl)propan-1-one ligands in a distorted square-planar geometry. Two S atoms from adjacent molecules occupy the axial positions with long Cu...S distances [3.0495 (10) and 3.1045 (9) Å] and complete the overall distorted octahedral coordination sphere. Weak intermolecular C—H...O hydrogen bonds are present.

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