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Hückel's rule

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In organic chemistry, Hückel's rule estimates whether a planar ring molecule will have aromatic properties. [1]

46 relations: Addition reaction, Alkene, Angewandte Chemie, Annulene, Aromaticity, Baird's rule, Benzene, Buckminsterfullerene, ChemComm, Conjugated system, Coronene, Cyclic compound, Cyclobutadiene, Cyclooctatetraene, Cyclooctatetraenide anion, Cyclopentadienyl, Cyclopropenium ion, Electron, Erich Hückel, Erlangen, Fullerene, Germany, Hückel method, Integer, Journal of the American Chemical Society, Linear combination of atomic orbitals, Möbius–Hückel concept, Molecule, Orbital hybridisation, Organic chemistry, Pariser–Parr–Pople method, Particle in a ring, Physical chemistry, Pi bond, Plane (geometry), Pyrene, Quantum mechanics, Regular icosahedron, Resonance (chemistry), Sodium cyclopentadienide, Square number, Substitution reaction, Triplet state, Tropylium cation, William von Eggers Doering, Zeitschrift für Physik.

Addition reaction

An addition reaction, in organic chemistry, is in its simplest terms an organic reaction where two or more molecules combine to form the larger one (the adduct).

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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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Angewandte Chemie

Angewandte Chemie (meaning "Applied Chemistry") is a weekly peer-reviewed scientific journal that is published by Wiley-VCH on behalf of the German Chemical Society (Gesellschaft Deutscher Chemiker).

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Annulene

Annulenes are completely conjugated monocyclic hydrocarbons.

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Aromaticity

In organic chemistry, the term aromaticity is used to describe a cyclic (ring-shaped), planar (flat) molecule with a ring of resonance bonds that exhibits more stability than other geometric or connective arrangements with the same set of atoms.

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Baird's rule

In organic chemistry, Baird's rule estimates whether a lowest triplet state of planar cyclic structure will have aromatic properties.

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Benzene

Benzene is an important organic chemical compound with the chemical formula C6H6.

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Buckminsterfullerene

Buckminsterfullerene is a type of fullerene with the formula C60.

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ChemComm

ChemComm (or Chemical Communications), formerly known as Journal of the Chemical Society D: Chemical Communications (1969–1971), Journal of the Chemical Society, Chemical Communications (1972–1995), is a peer-reviewed scientific journal published by the Royal Society of Chemistry.

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Conjugated system

In chemistry, a conjugated system is a system of connected p-orbitals with delocalized electrons in molecules which are conventionally represented as having alternating single and multiple bonds, which in general may lower the overall energy of the molecule and increase stability.

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Coronene

Coronene (also known as superbenzene) is a polycyclic aromatic hydrocarbon (PAH) comprising six peri-fused benzene rings.

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Cyclic compound

A cyclic compound (ring compound) is a term for a compound in the field of chemistry in which one or more series of atoms in the compound is connected to form a ring.

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Cyclobutadiene

Cyclobutadiene is an organic compound with the formula 44.

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Cyclooctatetraene

1,3,5,7-Cyclooctatetraene (COT) is an unsaturated derivative of cyclooctane, with the formula C8H8.

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Cyclooctatetraenide anion

In chemistry, the cyclooctatetraenide anion or cyclooctatetraenide is an aromatic species with a formula of 2− and abbreviated as COT2−.

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Cyclopentadienyl

Cyclopentadienyl can refer to.

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Cyclopropenium ion

The cyclopropenium ion is the cation with the formula C3H3+.

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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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Erich Hückel

Erich Armand Arthur Joseph Hückel (August 9, 1896, Berlin – February 16, 1980, Marburg) was a German physicist and physical chemist.

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Erlangen

Erlangen (East Franconian: Erlang) is a Middle Franconian city in Bavaria, Germany.

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Fullerene

A fullerene is a molecule of carbon in the form of a hollow sphere, ellipsoid, tube, and many other shapes.

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Germany

Germany (Deutschland), officially the Federal Republic of Germany (Bundesrepublik Deutschland), is a sovereign state in central-western Europe.

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Hückel method

The Hückel method or Hückel molecular orbital method (HMO), proposed by Erich Hückel in 1930, is a very simple linear combination of atomic orbitals molecular orbitals method for the determination of energies of molecular orbitals of π electrons in conjugated hydrocarbon systems, such as ethylene, benzene and butadiene.

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Integer

An integer (from the Latin ''integer'' meaning "whole")Integer 's first literal meaning in Latin is "untouched", from in ("not") plus tangere ("to touch").

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Journal of the American Chemical Society

The Journal of the American Chemical Society (also known as JACS) is a weekly peer-reviewed scientific journal that was established in 1879 by the American Chemical Society.

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Linear combination of atomic orbitals

A linear combination of atomic orbitals or LCAO is a quantum superposition of atomic orbitals and a technique for calculating molecular orbitals in quantum chemistry.

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Möbius–Hückel concept

The Möbius–Hückel treatment is one of two predicting reaction allowedness versus forbiddenness.

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Molecule

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds.

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Orbital hybridisation

In chemistry, orbital hybridisation (or hybridization) is the concept of mixing atomic orbitals into new hybrid orbitals (with different energies, shapes, etc., than the component atomic orbitals) suitable for the pairing of electrons to form chemical bonds in valence bond theory.

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Organic chemistry

Organic chemistry is a chemistry subdiscipline involving the scientific study of the structure, properties, and reactions of organic compounds and organic materials, i.e., matter in its various forms that contain carbon atoms.

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Pariser–Parr–Pople method

In molecular physics, the Pariser–Parr–Pople method applies semi-empirical quantum mechanical methods to the quantitative prediction of electronic structures and spectra, in molecules of interest in the field of organic chemistry.

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Particle in a ring

In quantum mechanics, the case of a particle in a one-dimensional ring is similar to the particle in a box.

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Physical chemistry

Physical Chemistry is the study of macroscopic, atomic, subatomic, and particulate phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, thermodynamics, quantum chemistry, statistical mechanics, analytical dynamics and chemical equilibrium.

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Pi bond

In chemistry, pi bonds (π bonds) are covalent chemical bonds where two lobes of an orbital on one atom overlap two lobes of an orbital on another atom.

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Plane (geometry)

In mathematics, a plane is a flat, two-dimensional surface that extends infinitely far.

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Pyrene

Pyrene is a polycyclic aromatic hydrocarbon (PAH) consisting of four fused benzene rings, resulting in a flat aromatic system.

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Quantum mechanics

Quantum mechanics (QM; also known as quantum physics, quantum theory, the wave mechanical model, or matrix mechanics), including quantum field theory, is a fundamental theory in physics which describes nature at the smallest scales of energy levels of atoms and subatomic particles.

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Regular icosahedron

In geometry, a regular icosahedron is a convex polyhedron with 20 faces, 30 edges and 12 vertices.

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Resonance (chemistry)

In chemistry, resonance or mesomerism is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by one single Lewis structure.

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Sodium cyclopentadienide

Sodium cyclopentadienide is an organosodium compound with the formula C5H5Na.

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Square number

In mathematics, a square number or perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself.

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Substitution reaction

Substitution reaction (also known as single displacement reaction or single substitution reaction) is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group.

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Triplet state

In quantum mechanics, a triplet is a quantum state of a system with a spin of quantum number s.

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Tropylium cation

In organic chemistry, the tropylium ion is an aromatic species with a formula of +. Its name derives from the molecule tropine (itself named for the molecule atropine).

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William von Eggers Doering

William von Eggers Doering (June 22, 1917 – January 3, 2011) was a Professor Emeritus at Harvard University and the former Chair of its Chemistry Department.

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Zeitschrift für Physik

Zeitschrift für Physik (English: Journal for physics) is a defunct series of German peer-reviewed German scientific journal of physics established in 1920 by Springer Berlin Heidelberg.

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Redirects here:

4n + 2 rule, 4n+2 rule, Heckel's Rule, Huckel rule, Huckel's Rule, Huckel's Rules, Huckel's rule, Huckle's rule, Hueckel rule, Hueckel's rule, Häckel's Rule, Hückel Rule, Hückel rule, Hückel’s rule.

References

[1] https://en.wikipedia.org/wiki/Hückel's_rule

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