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Pi bond

Index 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. [1]

37 relations: Acetylene, Alkene, Alkyne, Antibonding molecular orbital, Atomic nucleus, Atomic orbital, Bond length, Carbon–carbon bond, ChemComm, Chemical bond, Chemistry, Coordination complex, Covalent bond, Delta bond, Diatomic carbon, Diatomic molecule, Diborane(2), Double bond, Electron density, Ethane, Ethylene, Homonuclear molecule, Molecular geometry, Molecular orbital, Molecular symmetry, Node (physics), Orbital overlap, Pi backbonding, Pi interaction, Picometre, Quadruple bond, Quantum mechanics, Quintuple bond, Sigma bond, Stacking (chemistry), Transition metal, Triple bond.


Acetylene (systematic name: ethyne) is the chemical compound with the formula C2H2.

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

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In organic chemistry, an alkyne is an unsaturated hydrocarbon containing at least one carbon—carbon triple bond.

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Antibonding molecular orbital

In chemical bonding theory, an antibonding orbital is a type of molecular orbital (MO) that weakens the bond between two atoms and helps to raise the energy of the molecule relative to the separated atoms.

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Atomic nucleus

The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford based on the 1909 Geiger–Marsden gold foil experiment.

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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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Bond length

In molecular geometry, bond length or bond distance is the average distance between nuclei of two bonded atoms in a molecule.

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Carbon–carbon bond

A carbon–carbon bond is a covalent bond between two carbon atoms.

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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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Chemical bond

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds.

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Chemistry is the scientific discipline involved with compounds composed of atoms, i.e. elements, and molecules, i.e. combinations of atoms: their composition, structure, properties, behavior and the changes they undergo during a reaction with other compounds.

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Coordination complex

In chemistry, a coordination complex consists of a central atom or ion, which is usually metallic and is called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.

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Covalent bond

A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms.

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Delta bond

In chemistry, delta bonds (δ bonds) are covalent chemical bonds, where four lobes of one involved atomic orbital overlap four lobes of the other involved atomic orbital.

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Diatomic carbon

Diatomic carbon (systematically named ethenediylidene and dicarbon(C—C)), also called dicarbon, is an inorganic chemical with the chemical formula C.

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Diatomic molecule

Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements.

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Diborane(2) is an inorganic compound having the formula B2H2.

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Double bond

A double bond in chemistry is a chemical bond between two chemical elements involving four bonding electrons instead of the usual two.

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Electron density

Electron density is the measure of the probability of an electron being present at a specific location.

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Ethane is an organic chemical compound with chemical formula.

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Ethylene (IUPAC name: ethene) is a hydrocarbon which has the formula or H2C.

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Homonuclear molecule

Homonuclear molecules, or homonuclear species, are molecules composed of only one type of element.

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Molecular geometry

Molecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule.

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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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Molecular symmetry

Molecular symmetry in chemistry describes the symmetry present in molecules and the classification of molecules according to their symmetry.

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Node (physics)

A node is a point along a standing wave where the wave has minimum amplitude.

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Orbital overlap

In chemical bonds, an orbital overlap is the concentration of orbitals on adjacent atoms in the same regions of space.

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Pi backbonding

π backbonding, also called π backdonation, is a concept from chemistry in which electrons move from an atomic orbital on one atom to an appropriate symmetry antibonding orbital on a π-acceptor ligand.

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Pi interaction

In chemistry, π-effects or π-interactions are a type of non-covalent interaction that involves π systems.

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The picometre (international spelling as used by the International Bureau of Weights and Measures; SI symbol: pm) or picometer (American spelling) is a unit of length in the metric system, equal to, or one trillionth of a metre, which is the SI base unit of length.

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Quadruple bond

A quadruple bond is a type of chemical bond between two atoms involving eight electrons.

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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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Quintuple bond

A quintuple bond in chemistry is an unusual type of chemical bond, first reported in 2005 for a dichromium compound.

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Sigma bond

In chemistry, sigma bonds (σ bonds) are the strongest type of covalent chemical bond.

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Stacking (chemistry)

In chemistry, pi stacking (also called π–π stacking) refers to attractive, noncovalent interactions between aromatic rings, since they contain pi bonds.

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Transition metal

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

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Triple bond

A triple bond in chemistry is a chemical bond between two atoms involving six bonding electrons instead of the usual two in a covalent single bond.

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[1] https://en.wikipedia.org/wiki/Pi_bond

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