Novel Mixed-Valence Heteropolyoxometalates:  A Molybdenum Diphosphonate Anion [MoV7MoVIO16(O3PPhPO3H)4]3-and Its One- and Two-Dimensional Assemblies

2003 ◽  
Vol 42 (22) ◽  
pp. 7304-7308 ◽  
Author(s):  
Nathalie Calin ◽  
Slavi C. Sevov
Keyword(s):  
Mixed Valence ◽  
Two Dimensional

Structural and Magnetic Investigations of the Mixed-Valence FeII,III Two-Dimensional Layer Complex, [Fe2IIFe2III(HCOO)10(C6H7N)6]n

ChemPhysChem ◽  
2004 ◽  
Vol 5 (11) ◽  
pp. 1755-1761 ◽  
Author(s):  
Jacob Overgaard ◽  
Eva Rentschler ◽  
Grigore A. Timco ◽  
Finn K. Larsen
Keyword(s):  
Mixed Valence ◽  
Two Dimensional

K6[Fe8.27(HPO3)12]: a new mixed-valence iron phosphite

2014 ◽  
Vol 70 (4) ◽  
pp. 351-354 ◽  
Author(s):  
Farida Hamchaoui ◽  
Véronique Alonzo ◽  
Houria Rebbah ◽  
Eric Le Fur
Keyword(s):  
Title Compound ◽  
Mixed Valence ◽  
Bond Valence ◽  
Dimensional Structure ◽  
Two Dimensional ◽  
Space Group ◽  
Occupancy Factor ◽  
Mixed Alkali

The title compound, hexapotassium octairon(II,III) dodecaphosphonate, exhibiting a two-dimensional structure, is a new mixed alkali/3dmetal phosphite. It crystallizes in the space groupR\overline{3}m, with two crystallographically independent Fe atoms occupying sites of \overline{3}m(Fe1) and 3m(Fe2) symmetry. The Fe2 site is fully occupied, whereas the Fe1 site presents an occupancy factor of 0.757 (3). The three independent O atoms, one of which is disordered, are situated on a mirror and all other atoms are located on special positions with 3msymmetry. Layers of formula [Fe3(HPO3)4]2−are observed in the structure, formed by linear Fe3O12trimer units, which contain face-sharing FeO6octahedra interconnected by (HPO3)2−phosphite oxoanions. The partial occupancy of the Fe1 site might be described by the formation of two [Fe(HPO3)2]−layers derived from the [Fe3(HPO3)4]2−layer when the Fe1 atom is absent. Fe2+is localized at the Fe1 and Fe2 sites of the [Fe3(HPO3)4]2−sheets, whereas Fe3+is found at the Fe2 sites of the [Fe(HPO3)2]−sheets, according to bond-valence calculations. The K+cations are located in the interlayer spaces, between the [Fe3(HPO3)4]2−layers, and between the [Fe3(HPO3)4]2−and [Fe(HPO3)2]−layers.

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.

Investigating vibrational anharmonic couplings in cyanide-bridged transition metal mixed valence complexes using two-dimensional infrared spectroscopy

2014 ◽  
Vol 140 (8) ◽  
pp. 084505 ◽  
Author(s):  
Karla M. Slenkamp ◽  
Michael S. Lynch ◽  
Benjamin E. Van Kuiken ◽  
Jennifer F. Brookes ◽  
Caitlin C. Bannan ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Transition Metal ◽  
Mixed Valence ◽  
Two Dimensional ◽  
Two Dimensional Infrared Spectroscopy ◽  
Anharmonic Couplings

Coordination and Metalation Bifunctionality of Cu with 5,10,15,20-Tetra(4-pyridyl)porphyrin: Toward a Mixed-Valence Two-Dimensional Coordination Network

2012 ◽  
Vol 134 (14) ◽  
pp. 6401-6408 ◽  
Author(s):  
Yang Li ◽  
Jie Xiao ◽  
Tatyana E. Shubina ◽  
Min Chen ◽  
Ziliang Shi ◽  
...  
Keyword(s):  
Mixed Valence ◽  
Two Dimensional ◽  
Coordination Network
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