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5/-Electrons compounds

Hume-Rothery s rule The statement that the phase of many alloys is determined by the ratio.s of total valency electrons to the number of atoms in the empirical formula. See electron compounds. [Pg.206]

The unexpectedly complex product was isolated as an almost colourless air-stable powder, and a single-crystal X-ray analysis showed that it had the molecular adamantane-like structure (5). This is very similar to the structure of the iso-electronic compound P4O10 (p. 504). [Pg.390]

Introducing the bulky tri(isopropyl)phosphine causes a decrease in coordination number. This 16 electron compound undergoes a range of... [Pg.66]

In contrast to chloride compounds, niobium oxides have a VEC of 14 electrons, due to an overall anti-bonding character of the a2u state, caused by a stronger Nb-O anti-bonding contribution. In some cases, the VEC cannot be determined unambiguously due to the uncertainty in the electron distribution between the clusters and additional niobium atoms present in the majority of the structures. The 14-electron compounds exhibit semiconducting properties and weak temperature-independent paramagnetism. Unlike niobium chlorides, the oxides do not exhibit a correlation between the electronic configuration and intra-cluster bond distances. [Pg.84]

The newly synthesized heavy analogs of the 67r-electron compounds have found a very promising application as ligands for a new generation of transition metal... [Pg.104]

Hume-Rothery phases (brass phases, electron compounds ) are certain alloys with the structures of the different types of brass (brass = Cu-Zn alloys). They are classical examples of the structure-determining influence of the valence electron concentration (VEC) in metals. VEC = (number of valence electrons)/(number of atoms). A survey is given in Table 15.1. [Pg.161]

Experimentally, two equivalents of the alkyne for one equivalent of the metal species are necessary to achieve reaction. One equivalent serves to abstract H2 from the starting materials, RuH(H2)XL2 or OsH3XL2, hence generating in situ the very reactive 14-electron compound MHXL2 (M = Ru, Os). It is assumed that the reaction starts from the 14-electron complex modeled as MHC1(PH3)2 (M = Ru, Os) and the acetylene is used as a model for phenyl acetylene. DFT (B3LYP) calculations were carried out to... [Pg.146]

An important class of intermetallic phases (generally showing rather wide homogeneity ranges) are the Hume-Rothery phases, which are included within the so-called electron compounds . These are phases whose stable crystal structures may be supposed to be mainly controlled by the number of valence electrons per atom, that is, by the previously defined VEC. [Pg.296]

The Cu5Zn8 ( Cu5Zn6 9 — Cu5Zn9 7) phase is a classical example of a Hume-Rothery phase ( electron compounds , brass-type phases) that is of a phase in which there is a structure-determining influence of the VEC (valence electron concentration, see 4.4.5). [Pg.728]

This type of a-elimination with the generation of a singly coordinated four-valence-electron compound is rather unusual in silylium ion chemistry, only two... [Pg.208]

We have not discussed the structures of intermetallic compounds. Girgis (1983) has reviewed the systematics in the structures of intermetallic compounds, classifying them into valence compounds, electron compounds and size-factor compounds. [Pg.37]


See other pages where 5/-Electrons compounds is mentioned: [Pg.151]    [Pg.121]    [Pg.1178]    [Pg.192]    [Pg.120]    [Pg.204]    [Pg.100]    [Pg.159]    [Pg.184]    [Pg.116]    [Pg.368]    [Pg.355]    [Pg.103]    [Pg.63]    [Pg.114]    [Pg.203]    [Pg.351]    [Pg.114]    [Pg.153]    [Pg.115]    [Pg.22]    [Pg.23]    [Pg.222]    [Pg.77]    [Pg.93]    [Pg.25]    [Pg.192]    [Pg.74]    [Pg.398]    [Pg.16]    [Pg.1439]    [Pg.194]    [Pg.254]    [Pg.359]   
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18 valence electron metal-like compounds

18 valence electron related compounds

Absorption spectroscopy, lead compounds electronic transitions

Alkali graphite intercalation compounds electronic structures

Alkynyl compounds carrying unpaired electrons in remote substituents

Alkynyl compounds, unpaired electrons

Alloys electron compounds

Aluminum, electron-deficient compounds

Aromatic Compounds with Strongly Electron-Withdrawing Groups

Aromatic compounds electron count rules

Aromatic compounds electron delocalization

Aromatic compounds electron pairs

Aromatic compounds electron transfer

Aromatic compounds electronic structure

Atomic structure, organic compounds valence shell electrons

Auger electron spectroscopy compounds

Boron electron-deficient compounds

Boron, electron-deficient molecular compounds

C-Glycosyl compounds electron spin resonance

C-Glycosyl compounds one-electron reduction

Carbonyl compounds electron deficiency

Carbonyl compounds electronic effects

Carbonyl compounds, electron

Carbonyl compounds, electron charge transfer states

Carbonyl compounds, electron ligand interaction

Carbonyl compounds, electron selection

Carbonyl compounds, electron spectroscopy

Chlorine compounds, electron

Chlorine compounds, electron density

Chromium compounds, electronic structure

Closed-shell compounds electron transfer

Cluster compounds Electron counting

Cluster compounds electron affinity

Cluster compounds electron-rich clusters

Compound electron-deficient

Compound semiconductors electron mobility

Compound surface electronic properties

Compound, electron interstitial

Compounds Sharing Electrons

Compounds electron affinity

Compounds, electronically conducting organic

Coordination compounds 18-electron rule

Coordination compounds electron configurations

Coordination compounds electron mediators

Coordination compounds electron transfer

Coordination compounds electronic spectra

Coordination compounds electronic structures

Coordination compounds, electronic

Core electrons Covalent compounds

Covalent compounds unpaired electrons

Cyanide compounds electronic spectroscopy

Cycloaddition and Heterocyclization Reactions of Acetylenic Compounds with Electron-Withdrawing Substituents

Delocalization Energy Is the Additional Stability Delocalized Electrons Give to a Compound

Diazo compounds decomposition, electronic

Disordered compounds electronic band structure

Double-bond compounds electronic structure

Ejected electron spectroscopy compounds

Electron Affinities of Organic Carbonyl Compounds by the ECD

Electron Affinities of Organic Nitro Compounds the ECD and TCT

Electron Transfer Mechanisms in Molybdenum and Tungsten Model Compounds

Electron Transfer from Aliphatic and Alicyclic Compounds

Electron Transfer in Intermetallic Compounds

Electron Transfer to and from Diazo Compounds Ion Radicals

Electron affinity, organic compounds

Electron aluminium compounds

Electron cadmium compounds

Electron compound formation and

Electron counting borane cluster compounds, 364

Electron counting compounds

Electron counting isoelectronic compound

Electron density distributions transition metal compounds

Electron distribution in compounds

Electron donor-acceptor compounds

Electron donor-acceptor compounds application

Electron donor-acceptor compounds interactions

Electron donor-acceptor transfer compounds

Electron gallium compounds

Electron indium compounds

Electron intercalated compounds

Electron intervalence compounds

Electron involving quinone-like compound

Electron ionization compound

Electron ionization zinc compounds

Electron mercury compounds

Electron pairs, lead compounds, small

Electron spin in coordination compounds

Electron spin resonance compounds

Electron spin resonance radical compounds, identification

Electron spin resonance spectra compounds

Electron transfer reactions coordination compounds

Electron tunneling reactions between inorganic ion radicals and transition metal compounds

Electron tunneling reactions between metal compounds

Electron withdrawing groups compounds

Electron, atom ratio compound

Electron, atom ratio deficient compound

Electron, atom ratio excess compound

Electron-Density Distributions Inorganic Compounds

Electron-Density Distributions in Inorganic Compounds

Electron-Poor Aromatic Compounds

Electron-affinic compounds

Electron-beam system, compound

Electron-capturing compounds

Electron-counting rules transition element compounds

Electron-deficient (multicentre bonded) compounds

Electron-deficient bridge-bonded main group compounds

Electron-phonon interaction in intermetallic compounds

Electron-rich aromatic compounds

Electron-rich heteroaromatic compounds

Electron-transfer Reactions of Aromatic Compounds

Electron-transfer Reactions of Carbonyl Compounds

Electron-transfer Reactions of Heteroaromatic Compounds

Electron-transfer reactions with neutral metal compounds

Electron-withdrawing substituents carbonyl and nitro compounds

Electronic Spectra of Coordination Compounds

Electronic Transitions and Lifetime of Excited States in Porphyrin-Based Compounds

Electronic absorption spectra coordination compounds

Electronic aluminium compounds

Electronic aspects of purine tautomerism compounds

Electronic assemblies intermetallic compounds

Electronic beryllium compounds

Electronic boron compounds

Electronic cadmium compounds

Electronic compound semiconductor devices

Electronic compounds

Electronic compounds

Electronic gallium compounds

Electronic indium compounds

Electronic magnesium compounds

Electronic mercury compounds

Electronic spectra adsorbed compounds

Electronic spectra inorganic compounds

Electronic spectra of large-ring heterocyclic compounds

Electronic spectra of small-ring heterocyclic compounds

Electronic spectra sulfur compounds

Electronic spectroscopy compounds

Electronic spectroscopy transition metal compounds

Electronic structure of carbonyl compounds

Electronic structure of heterocyclic sulfur compounds

Electronic structure transition metal compounds

Electronic structures of coordination compounds

Electronic transitions of organic compounds

Electronic zinc compounds

Electrons toward inorganic compounds

Fluorinations electron rich aromatic compounds

Graphite electronic structure, intercalation compounds

Graphite intercalation compounds acceptor, electronic structures

Graphite intercalation compounds electron transfer

Graphite intercalation compounds stage-2 electronic structure

Graphite, intercalation compounds electronic properties

Heterocyclic aromatic compounds valence electrons

Heterocyclic compounds electron-deficient heterocycles

Heterocyclic compounds electron-rich heterocycles

Heterocyclic compounds sulfur, electronic structure

Heterocyclic sulphur compounds, electronic

Heterocyclic sulphur compounds, electronic structure

Hydrated electrons, reactions of, with organic compounds

Intermetallic compounds, 5/-electrons

Ionic compounds electron configurations

Ionic compounds valence electrons

Lanthanide compounds electron-transfer reactions

Layer lattice compounds electron diffraction

Lead compounds electronic screening

Lithium bridged electron-deficient compounds

Magnesium bridged electron-deficient compounds

Metal cluster compounds electronic configurations

Metal oxide-based compounds electron transfer reaction

Metal surfaces compounds Electron energy loss

Mixed valence compounds electronic spectra

Mixed-valence compounds electronic coupling

Mixed-valence compounds optical electron transfer

Molecular Compounds Sharing Electrons

Molecular electronics inclusion compounds)

Molecular electronics intercalated layered compounds

Molybdenum cluster compounds electronic structure

Monomeric compound electronic stabilization

Nickel compounds electron spectroscopy

Nickel compounds transition metal electronic structure

Noble gas electron configurations in ionic compounds

Octet rule electron-deficient compounds

Olefins electrons from aromatic compounds

One-Electron Reductions of Carbonyl Compounds and Esters Reductive Coupling

One-electron oxidation of selenium and tellurium compounds

One-electron reduced organic nitro and nitroso compounds

Organic silicon compounds, electron impact

Organic silicon compounds, electron impact ionization

Organolithium compounds electronic structure

Organolithium compounds, electron-transfer

Organolithium compounds, electron-transfer formation

Organometallic compounds electron deficiency

Organometallic compounds electron rules

Organometallic compounds electron-density distributions

Organometallic compounds, electronic

Organosilicon compounds photoinduced electron

Palladium compounds, electronic structure

Palladium compounds, electronic structure transition state

Para-Halogenations, electron-rich aromatic compounds

Photoinduced electron transfer donor-acceptor compounds

Platinum compounds electron-poor

Potzel, G.M. Kalvius and J. Gal, Mossbauer studies on electronic structure of intermetallic compounds

Pyrroles electron deficient unsaturated compounds

Rare earth elements, and compounds electronic structures

Rare earth elements, and compounds thereof electronic structures

Rich Compounds as Electron Donors

Selected Topic in Depth Electron-Deficient Compounds

Structural studies, lead compounds electron pairs

Structures of Main Group Organometallic Compounds Containing Electron-Deficient

Structures of Main Group Organometallic Compounds Containing Electron-Deficient Bridge

Structures of Main Group Organometallic Compounds Containing Electron-Deficient Bridge Bonds

Sulfur compounds, electronic structure

Suppliers of Adhesives and Potting Compounds for Electronics

Ten-electron compounds

Thalmeier and B. Liithi, The electron—phonon interaction in intermetallic compounds

The Electronic Structure of Transition Metal Compounds

Three-centre two-electron bonding in beryllium compounds

Transferring Electrons Organic Compounds

Transition metal compounds chemical electron-sharing bonds

Triple-bond compounds electronic structure

Valence electrons compounds

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