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18-electron rule

Index 18-electron rule

The 18-electron rule is a rule used primarily for predicting and rationalizing formulae for stable metal complexes, especially organometallic compounds. [1]

64 relations: Agostic interaction, Alkene, Alkoxide, Atomic orbital, Basis set (chemistry), Butyl group, Carbonyl group, Catalysis, Catalytic cycle, Chelation, Chemical Society Reviews, Chromium hexacarbonyl, Cobaltocene, Cyclopentadiene, D electron count, Dissociative substitution, Electron, Electron configuration, Electron counting, Electron shell, Ferrocene, Ferrocyanide, Fluoride, Hexamminecobalt(III) chloride, Hydroformylation, Hydrogenation, Imide, Iron pentacarbonyl, Irving Langmuir, Journal of Chemical Education, Journal of Computational Chemistry, Ligand, Ligand field theory, Molecular orbital, Molybdenum hexacarbonyl, Monsanto process, Neopentane, Nickel tetracarbonyl, Nickelocene, Nitride, Noble gas, Non-bonding orbital, Norbornane, Octahedral molecular geometry, Octet rule, Organometallic chemistry, Oxidation state, Oxide, Oxygen, Pentamethylcyclopentadiene, ..., Phosphine, Science (journal), Spectrochemical series, Spin states (d electrons), Square planar molecular geometry, Stoichiometry, Tetrahedral molecular geometry, Tetrahydrofuran, Titanium tetrachloride, Tolman's rule, Transition metal, Vanadium hexacarbonyl, Vaska's complex, Zeise's salt. Expand index (14 more) »

Agostic interaction

Agostic interaction is a term in organometallic chemistry for the interaction of a coordinatively-unsaturated transition metal with a C−H bond, when the two electrons involved in the C−H bond enter the empty d-orbital of a transition metal, resulting in a three-center two-electron bond.

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Alkene

In organic chemistry, an alkene is an unsaturated hydrocarbon that contains at least one carbon–carbon double bond.

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Alkoxide

An alkoxide is the conjugate base of an alcohol and therefore consists of an organic group bonded to a negatively charged oxygen atom.

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Atomic orbital

In quantum mechanics, an atomic orbital is a mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom.

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Basis set (chemistry)

A basis set in theoretical and computational chemistry is a set of functions (called basis functions) that is used to represent the electronic wave function in the Hartree–Fock method or density-functional theory in order to turn the partial differential equations of the model into algebraic equations suitable for efficient implementation on a computer.

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Butyl group

In organic chemistry, butyl is a four-carbon alkyl radical or substituent group with general chemical formula −C4H9, derived from either of the two isomers of butane.

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Carbonyl group

In organic chemistry, a carbonyl group is a functional group composed of a carbon atom double-bonded to an oxygen atom: C.

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Catalysis

Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalysthttp://goldbook.iupac.org/C00876.html, which is not consumed in the catalyzed reaction and can continue to act repeatedly.

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Catalytic cycle

In chemistry, a catalytic cycle is a multistep reaction mechanism that involves a catalyst.

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Chelation

Chelation is a type of bonding of ions and molecules to metal ions.

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Chemical Society Reviews

Chemical Society Reviews is a biweekly peer-reviewed scientific journal published by the Royal Society of Chemistry, for review articles on topics of current interest in chemistry.

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Chromium hexacarbonyl

Chromium carbonyl, also known as chromium hexacarbonyl, is the chemical compound with the formula Cr(CO)6.

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Cobaltocene

Cobaltocene, known also as bis(cyclopentadienyl)cobalt(II) or even "bis Cp cobalt", is an organocobalt compound with the formula Co(C5H5)2.

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Cyclopentadiene

Cyclopentadiene is an organic compound with the formula C5H6.

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D electron count

The d electron count is a chemistry formalism used to describe the electron configuration of the valence electrons of a transition metal center in a coordination complex.

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Dissociative substitution

Dissociative substitution describes a pathway by which compounds interchange ligands.

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Electron

The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.

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Electron configuration

In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals.

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Electron counting

Electron counting is a formalism used for classifying compounds and for explaining or predicting electronic structure and bonding.

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Electron shell

In chemistry and atomic physics, an electron shell, or a principal energy level, may be thought of as an orbit followed by electrons around an atom's nucleus.

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Ferrocene

Ferrocene is an organometallic compound with the formula Fe(C5H5)2.

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Ferrocyanide

Ferrocyanide is the name of the anion 4−.

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Fluoride

Fluoride.

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Hexamminecobalt(III) chloride

Hexaamminecobalt(III) chloride is the chemical compound with the formula Cl3.

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Hydroformylation

Hydroformylation, also known as oxo synthesis or oxo process, is an industrial process for the production of aldehydes from alkenes.

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Hydrogenation

Hydrogenation – to treat with hydrogen – is a chemical reaction between molecular hydrogen (H2) and another compound or element, usually in the presence of a catalyst such as nickel, palladium or platinum.

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Imide

In organic chemistry, an imide is a functional group consisting of two acyl groups bound to nitrogen.

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Iron pentacarbonyl

Iron pentacarbonyl, also known as iron carbonyl, is the compound with formula5.

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Irving Langmuir

Irving Langmuir (January 31, 1881 – August 16, 1957) was an American chemist and physicist.

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Journal of Chemical Education

The Journal of Chemical Education is a monthly peer-reviewed academic journal available in both print and electronic versions.

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Journal of Computational Chemistry

The Journal of Computational Chemistry is a peer-reviewed scientific journal published since 1980 by John Wiley & Sons.

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Ligand

In coordination chemistry, a ligand is an ion or molecule (functional group) that binds to a central metal atom to form a coordination complex.

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Ligand field theory

Ligand field theory (LFT) describes the bonding, orbital arrangement, and other characteristics of coordination complexes.

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Molecular orbital

In chemistry, a molecular orbital (MO) is a mathematical function describing the wave-like behavior of an electron in a molecule.

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Molybdenum hexacarbonyl

Molybdenum hexacarbonyl (also called molybdenum carbonyl) is the chemical compound with the formula Mo(CO)6.

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Monsanto process

The Monsanto process is an industrial method for the manufacture of acetic acid by catalytic carbonylation of methanol.

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Neopentane

Neopentane, also called 2,2-dimethylpropane, is a double-branched-chain alkane with five carbon atoms.

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Nickel tetracarbonyl

Nickel carbonyl (IUPAC name: tetracarbonylnickel) is the organonickel compound with the formula Ni(CO)4.

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Nickelocene

Nickelocene is the organonickel compound with the formula Ni(''η''5-C5H5)2.

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Nitride

In chemistry, a nitride is a compound of nitrogen where nitrogen has a formal oxidation state of 3-.

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Noble gas

The noble gases (historically also the inert gases) make up a group of chemical elements with similar properties; under standard conditions, they are all odorless, colorless, monatomic gases with very low chemical reactivity.

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Non-bonding orbital

A non-bonding orbital, also known as non-bonding molecular orbital (NBMO), is a molecular orbital whose occupation by electrons neither increases nor decreases the bond order between the involved atoms.

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Norbornane

Norbornane (also known as bicycloheptane) is an organic compound and a saturated hydrocarbon with chemical formula C7H12.

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Octahedral molecular geometry

In chemistry, octahedral molecular geometry describes the shape of compounds with six atoms or groups of atoms or ligands symmetrically arranged around a central atom, defining the vertices of an octahedron.

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Octet rule

The octet rule is a chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electron configuration as a noble gas.

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Organometallic chemistry

Organometallic chemistry is the study of organometallic compounds, chemical compounds containing at least one chemical bond between a carbon atom of an organic molecule and a metal, including alkaline, alkaline earth, and transition metals, and sometimes broadened to include metalloids like boron, silicon, and tin, as well.

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Oxidation state

The oxidation state, sometimes referred to as oxidation number, describes degree of oxidation (loss of electrons) of an atom in a chemical compound.

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Oxide

An oxide is a chemical compound that contains at least one oxygen atom and one other element in its chemical formula.

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Oxygen

Oxygen is a chemical element with symbol O and atomic number 8.

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Pentamethylcyclopentadiene

1,2,3,4,5-Pentamethylcyclopentadiene is a cyclic dialkene with the formula C5Me5H (Me.

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Phosphine

Phosphine (IUPAC name: phosphane) is the compound with the chemical formula PH3.

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Science (journal)

Science, also widely referred to as Science Magazine, is the peer-reviewed academic journal of the American Association for the Advancement of Science (AAAS) and one of the world's top academic journals.

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Spectrochemical series

A spectrochemical series is a list of ligands ordered on ligand strength and a list of metal ions based on oxidation number, group and its identity.

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Spin states (d electrons)

Spin states when describing transition metal coordination complexes refers to the potential spin configurations of the metal center's d electrons.

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Square planar molecular geometry

The square planar molecular geometry in chemistry describes the stereochemistry (spatial arrangement of atoms) that is adopted by certain chemical compounds.

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Stoichiometry

Stoichiometry is the calculation of reactants and products in chemical reactions.

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Tetrahedral molecular geometry

In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron.

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Tetrahydrofuran

Tetrahydrofuran (THF) is an organic compound with the formula (CH2)4O.

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Titanium tetrachloride

Titanium tetrachloride is the inorganic compound with the formula TiCl4.

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Tolman's rule

Tolman's rule states that, in a certain chemical reaction, the steps involve exclusively intermediates of 18- and 16 electron configuration.

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Transition metal

In chemistry, the term transition metal (or transition element) has three possible meanings.

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Vanadium hexacarbonyl

Vanadium hexacarbonyl is the inorganic compound with the formula V(CO)6.

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Vaska's complex

Vaska's complex is the trivial name for the chemical compound trans-carbonylchlorobis(triphenylphosphine)iridium(I), which has the formula IrCl(CO)2.

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Zeise's salt

Zeise's salt, potassium trichloro(ethene)platinate(II), is the chemical compound with the formula K·H2O.

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16-Electron Complexes, 16-Electron complex, 16-Electron complexes, 18 electron rule, 18-Electron rule, 18-electron complex, 18VE compound, 18e complex, 18e rule, Duodectet rule, Eighteen electron rule, Eighteen-electron rule, Electron Rule, Electron count.

References

[1] https://en.wikipedia.org/wiki/18-electron_rule

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