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Coordination Structures

Tin(II) chlorides are similarly complex (Fig. 10.5). In the gas phase, SnCh forms bent molecules, but the crystalline material (mp 246°, bp 623°) has a layer structure with chains of comer-shared trigonal pyramidal SnClsl groups. The dihydrate also has a 3-coordinated structure with only I of the H2O molecules directly bonded to the Sn (Fig. I0.5c) the neutral aquo complexes are arranged in double layers with the second H2O molecules interleaved between them to form a two-dimensional H-bonded network... [Pg.379]

The compounds are isolated by sublimation from the reaction mixture. Perhaps surprisingly the compounds fall into two quite distinct classes. Those of Np and Pu are unstable, volatile, monomeric liquids which at low temperatures crystallize with the 12-coordinate structure of Zr(BFl4)4 (Fig. 21.7, p. 969). The borohydrides of Th, Pa and U, on the other hand, are thermally more stable and less reactive solids. They possess a curious helical polymeric structure in which each An is surrounded by 6 BFI4 ions, 4 being bridging groups attached by 2 FI atoms and... [Pg.1277]

Ir(PMe2Ph)J + H2 -> IrH2(PMe2Ph)J With bulky phosphines, 6-coordinate structures are not possible [157]... [Pg.150]

Five-coordinated structures. R. R. Holmes, Prog. Inorg. Chem., 1984, 32,119 (352). [Pg.66]

Let — fe be the charge of the anion located at a corner shared among several polyhedra. We now postulate the following electrostatic valence principle II. In a stable coordination structure the electric charge of each anion tends to compensate the strength of the electrostatic valence bonds reaching to it from the cations at the centers of the polyhedra of which it forms a corner that is, for each anion... [Pg.289]

The coordination theory and the principles governing coordinated structures provide the foundation for an interpretation of the structure of the complex silicates and other complex ionic crystals which may ultimately lead to the understanding of the nature and the explanation of the properties of these interesting substances. This will be achieved completely only after the investigation of the structures of many crystals with x-rays. To illustrate the clarification introduced by the new conception the following by no means exhaustive examples are discussed. [Pg.296]

During the investigation of the structure of brookite, the orthorhombic form of titanium dioxide, another method of predicting a possible structure for ionic compounds was developed. This method, which is described in detail in Section III of this paper, depends on the assumption of a coordination structure. It leads to a number of possible simple structures, for each of which the size of the unit of structure, the space-group symmetry, and the positions of all ions are fixed. In some cases, but not all, these structures correspond to closepacking of the large ions when they do, the method further indicates... [Pg.484]

A series of paramagnetic [NiL-2H] complexes have been isolated in which L = 2,6-diacetylpyridine bis(azacyclothiosemicarbazones) with Ni(II) assuming a distorted five-coordinate structure with d-d bands at about 7250, 10510, 12500, 14400, 19200 and 20500 cm [153], None of these Ni(II) complexes were reported to have activity against the P388 lymphocytic leukemia test system in mice. [Pg.41]

The dinuclear active site of urease (1) has been studied in great detail23-29 and has inspired manifold model studies—hence a separate section, Section 6.3.4.12.7, is dedicated to the coordination chemistry related to urease. E. coli Glx I is the first example of a Ni-dependent isomerase and contains a single Ni11 ion coordinated by two histidines, two axial carboxylates of glutamic acid, and two water molecules (2).30-32 It is not active with Zn bound, which is believed to result from the inability of the Zn-substituted enzyme to bind a second aqua ligand and to adopt a six-coordinate structure. [Pg.249]

K. Fukui, Y. Fujisawa, H. Ohya-Nishiguchi, H. Kamada and H. Sakurai, In vivo coordination structural changes of a potent insulin-mimetic agent, bis(picolinato)oxovanadium(IV), studied by electron spin-echo modulation spectroscopy, J. Inorg. Biochem., 1999, 77, 215. [Pg.168]


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5-Coordinate intermediates, structures

Arene complexes, ring structures, -coordination

Backbone structure coordination polymers

Backbone structure metal coordination polymers

Backbone structure transition metals coordination

Bis four-coordinate structures, vibrational

CHAIN structure. Reaction coordinate

Capped octahedron coordination structures

Capped trigonal prism coordination structures

Chelating agents coordination structure

Coordinate covalent bonds structure

Coordinates, crystal structure

Coordination Number Pattern Recognition Theory of Carborane Structures

Coordination Number Pattern Recognition Theory of Carborane Structures Robert E. Williams

Coordination Numbers and Structures

Coordination and Network Structures

Coordination and structure

Coordination chemistry chiral structures

Coordination chemistry helical structures

Coordination chemistry molecular structures

Coordination complexes bridging ligand structures

Coordination complexes cluster structures

Coordination complexes rules for drawing structure

Coordination compound structural isomerism

Coordination compounds electronic structures

Coordination compounds structural

Coordination compounds structural formulae

Coordination compounds structure representation

Coordination geometry structures

Coordination helical structure

Coordination in Metalloproteins Structural and Electronic Aspects

Coordination number ionic structure

Coordination numbers, lead structures

Coordination polymers interpenetrated structures

Coordination polymers structure

Coordination sites in host mineral structures accommodating transition metal ions

Coordination spheres electronic structure

Coordination structural data

Coordination-type structure

Crystal structure coordination number

Crystal structure studies, coordination

Crystal structure studies, coordination compounds

Cyclobutadiene complexes, -coordinated ring structures

Cyclobutadienes metal-coordinated structures

Disordered phases, structural coordination

Electronic structure coordination sphere effects

Electronic structure of coordination

Electronic structures of coordination compounds

Five-membered ring structures, -coordination

Four-coordinate structures

Four-coordinate structures complexes

Iron Coordination Structure

Lattice, coordination structure

Layered structures coordination polymer networks

Linear coordination structures

Liquid structure coordination number

Local coordinative saturation structure

Low-coordinate structures

Magnesium, tetrahedral coordination general structure

Metalloprotein metal coordination site structures, examples

Molecular structure coordinate covalent bonds

Molecular structures lanthanide-coordination chemistry

Nickel complexes four-coordinate structures

Nomenclature, geometrical structure and isomerism of coordination compounds

Nucleobase coordination chemistry structures

Nucleophilic attack 5- coordinate intermediate structure

Nucleotide-metal complexes, coordination structure

Octahedral coordination structures

Octahedral coordination structures, edge-sharing

Pentagonal bipyramid coordination structures

Pore structure, porous coordination polymers

Resonance Raman spectroscopy four-coordinate structure

Ring structures metal coordination complexes, phthalocyanines

Second coordination sphere structure

Self-assemblies through coordination structure

Solid structures coordination number

Solution coordination structural considerations

Spherical structures, lanthanide-coordination

Square planar coordination structures

Square pyramid coordination structures

Structural Relaxation in Relation to Fragility and Mean Coordination

Structural arrangement, coordination

Structural arrangement, coordination shell

Structural coordination chemistry

Structure and Bonding in Coordination Compounds

Structure and Isomerism in Coordination Compounds

Structure and atomic coordinates

Structure and bonding of H2 coordination compounds

Structure intramolecularly coordinating substituents

Structure ligand coordination

Structure of coordination compounds

Structures as assemblies of coordination polyhedra

Structures coordination compounds

Structures of Coordination Complexes

Supramolecular Coordination Networks Employing Sulfonate and Phosphonate Linkers From Layers to Open Structures

Syntheses and Coordination Structures

THE SOLUBILITY OF COORDINATION COMPOUNDS RELATIONSHIP TO COMPOSITION AND STRUCTURE

Tetrahedral coordination structures

Tetrahedral structures, lanthanide-coordination

Tin Electronic Structure, Bonding Type, and Coordination

Transition metal complexes (coordination structure

Trigonal bipyramid coordination structures

Trigonal coordination structures

Twelve-coordinate structures

Water Activation Coordination Sphere Effects on M-OH2 Acidity and Structure

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