n
(chemistry) A simple or compound principle, whose presence is necessary to produce acidity, as oxygen, chlorine, bromine, iodine, etc.
n
(chemistry, obsolete) Valence.
n
(chemistry) An attractive force between atoms, or groups of atoms, that contributes towards their forming bonds
adj
(chemistry, physics) Describing an atomic or molecular orbital whose energy increases as its constituent atoms are brought closer together - thus generating a repulsive force that hinders bonding.
n
(chemistry, physics) an atomic or molecular orbital whose energy increases as its constituent atoms are brought closer together - thus generating a repulsive force that hinders bonding
adj
(physics) Connected by an antibonding orbital (or the equivalent)
n
(chemistry) A ligand that has two or more bonds to the same metal centre.
n
(chemistry, physics) The transfer of one or more electrons from an atomic orbital of an atom to an antibonding orbital of a ligand
n
(chemistry) The angle between two bonds that have a common atom
n
(chemistry, physics) The distance between a pair of atoms that are bonded together in a molecule
n
(chemistry) The number of bonds between a pair of atoms in a molecule
adj
(chemistry) That forms a bond
n
(chemistry, physics) A molecular orbital, responsible for a covalent bond between two atoms, formed by overlap of their corresponding atomic orbitals
n
(chemistry) An intramolecular valence bond, atom or chain of atoms that connects two different parts of a molecule; the atoms so connected being bridgeheads.
v
(transitive) To react with carbon.
n
(inorganic chemistry) A method for the production of metallic sodium by the electrolysis of molten sodium hydroxide
n
(chemistry) The ability of a few elements, most especially carbon, to yield chains and rings by forming covalent bonds with atoms of the same element.
n
(chemistry) A noncovalent interaction between a cation, a positive ion like Li⁺ or Na⁺, and an aromatic residue such as benzene, ethylene, acetylene.
n
(chemistry) Any of several attractive forces that serve to bind atoms together to form molecules
n
(chemistry, of a molecular model) A numerical indication of how many pairs of atoms are unusually close together
n
(chemistry) An assemblage of atoms or molecules bound together
n
(chemistry) Any of two or more forms of the same compound that have different conformations, and can be interconverted typically by rotation about a single bond
n
(chemistry) The spatial arrangement of a group of atoms in a molecule as a result of rotation about a covalent bond which remains unbroken.
n
(electrochemistry) An electron donor and its corresponding electron acceptor form.
n
(chemistry) A system of delocalized orbitals consisting of alternating single bonds and double bonds
n
(chemistry) A type of covalent bond where the two electrons being shared originate from the same atom; a dative bond.
n
(physical chemistry) Coordinate bond.
n
(chemistry) the chemistry of coordination compounds
n
(chemistry) The number of other atoms surrounding an atom in a molecule
n
(chemistry) A form of valence in which electrons are shared between participating atoms
n
(chemistry) Alternative spelling of covalence [(chemistry) A form of valence in which electrons are shared between participating atoms]
n
(chemistry) A type of chemical bond where two atoms are connected to each other by the sharing of two or more electrons.
n
(chemistry) A molecular compound.
n
(chemistry) A covalent bond between two molecules (especially one of a series between polymer chains)
n
(metallurgy) The extraction of gold or silver from their ores using the cyanide process
adj
(sciences) Formed by two electrons contributed by one atom; see dative bond.
adj
(chemistry) Having an atomic valence of 10 (which is rarely found in nature but is theoretically possible).
n
(chemistry) the phenomenon in which bonding electrons of some molecules serve to bind several atoms instead of just two; it is observed in metals and in aromatic and conjugated organic compounds
n
(chemistry) The condition of being divalent
n
(chemistry) The condition of being divalent; divalence.
n
(chemistry) A group or molecule that donates either a radical, electrons or a moiety in a chemical reaction. Compare acceptor.
n
(physical chemistry) A covalent bond in which two electron pairs (instead of the usual one) are shared between two atoms; most common between carbon atoms and carbon, oxygen or nitrogen atoms, but several other forms are known.
n
(chemistry, dated) The theory, originated by Lavoisier and developed by Berzelius, that all definite compounds are binary in their nature, and consist of two distinct constituents, themselves simple or complex, and having opposite chemical or electrical affinities.
n
(chemistry) The number of electrons gained or lost during the formation of an ionic bond.
adj
(chemistry) Of or pertaining to electrovalency/electrovalence.
n
Initialism of expanded polytetrafluoroethylene.
n
(physics) An atomic nucleus whose radius is appreciably larger than that predicted by the liquid drop model (wherein the nucleus is assumed to be a sphere of constant density).
n
Alternative spelling of halo nucleus [(physics) An atomic nucleus whose radius is appreciably larger than that predicted by the liquid drop model (wherein the nucleus is assumed to be a sphere of constant density).]
n
(chemistry) A measure of the number of atoms of a ligand that are coordinated to a central atom.
n
Abbreviation of hydroxychloroquine sulfate.
adj
(chemistry, of a ligand) Partially labile
n
The condition of being heptavalent
adj
(chemistry) Concerning an effect in one entity that is controlled or influenced by a separate entity, such as when one ligand influences the binding of another ligand.
adj
(chemistry, rare) Relating to holmium.
adj
(chemistry) Having the same valency/valence.
n
(chemistry) The linear combination of atomic orbitals in a molecule to form hybrid orbitals.
n
(chemistry) The property of an atom (in a molecule) having a larger than normal coordination number (typically greater than 4)
n
(chemistry) A higher than normal valency (typically involving a transfer of the electrons from the central (hypervalent) atom to the nonbonding molecular orbitals which it forms with (usually more electronegative) ligands)
adj
(chemistry) having a higher than normal valence
n
(chemistry) any compound which contains more than eight formally assignable electrons in a valence shell directly associated with the central atom in direct bonding with a number of ligands
adj
(chemistry) Between bonds.
adj
(chemistry) Between metal sites that have different oxidation states.
adj
(chemistry) Within a ligand
n
(chemistry) A type of chemical bond where two atoms or molecules are connected to each other by electrostatic attraction.
n
(chemistry) The state of being ionocovalent.
adj
(chemistry, of a bond) Having both ionic and covalent character i.e. having some degree of sharing and some degree of separation of electrons
adj
(chemistry) Describing a form of hyperconjugation in which there are contributions from different degrees of bonding between a pair of atoms.
adj
(chemistry) Forming alkalis with oxygen, as some metals do.
adj
(chemistry) In the form of an adsorbate or adduct.
n
A simple mathematical approximation of the interaction between a pair of neutral atoms or molecules.
adj
(chemistry) binding with a ligand
n
(chemistry) A bond of affinity, or a unit of valence between atoms; applied to a unit of chemical force or attraction.
n
(informal) Lennard-Jones potential
n
(chemistry) A pair of electrons in the valence shell of an atom that does not participate in bonding.
n
(chemistry) a chemical bond in which mobile electrons are shared over many nuclei; this leads to electrical conduction
n
(chemistry) A specific segment of a molecule.
n
Any propellant that consists of a single substance, or of a mixture of fuel and oxidant in the same container
n
(chemistry, rare) The state of being univalent.
adj
(chemistry) Having multiple conformers
adj
Containing multiple electrons
adj
(chemistry) Characteristic of multiple parent compounds.
n
(chemistry, physics) A covalent bond formed by the overlap of multiple pairs or electron orbitals
adj
(chemistry) Having more than one valency.
adj
(chemistry) Having more than one valency or having a valency greater than 3; polyvalent.
n
Initialism of nerve agent. [Synonym of nerve gas]
n
(chemistry, physics) Any ion near another one that is involved in transport through a membrane, and that is influencing its transport properties (especially one that assists, rather than counters, the transport of another ion)
adj
(chemistry) Having an atomic valence of 9.
n
(chemistry, physics) A nonbonding relationship between two atoms
adj
(chemistry) Describing a form of bonding between large molecules that does not involve discrete bonds between pairs of atoms
n
(chemistry) The number of central metal atoms in a coordination compound.
n
(chemistry) The condition of being octavalent
n
(chemistry) The statement that when atoms combine to form molecules they generally each lose, gain, or share valence electrons until they attain or share eight; also called [Lewis rule of eight]
v
(inorganic chemistry) To have a higher than normal coordination number
n
Alternative spelling of pairbonding [The formation of a pair bond.]
n
The formation of a pair bond.
n
(chemistry) The condition of being paucivalent
adj
(chemistry) Having a low valency
adj
Having five identical units
n
The condition of being pentavalent
n
Alternative form of pentavalence [The condition of being pentavalent]
adj
(medicine) Having a vaccine valence of 5.
n
(physics, chemistry) A form of covalent bond in which a pair of atomic orbitals are shared
n
(chemistry) A covalent bond in which the electrons are not shared equally, giving the bond some ionic character
adj
(physics, of an atom) Having more than one electron
adj
(chemistry) Having multiple valencies.
adj
(chemistry) Following attachment of a ligand
n
(chemistry) in a coordination compound, the number of negative ions needed to satisfy the charge on the central metal ion
n
(chemistry) Any of several logical or physical connections between specified atoms that are not standard covalent bonds; examples include steric constraints (logical) and hydrogen bonds (physical).
adj
(chemistry) Having a valence of four
n
(organic chemistry) A bond between atoms of neighbouring rings
n
(chemistry) in a coordination compound, the number of ions or molecules that are coordinated to the central metal ion; its coordination number
adj
(chemistry) heptavalent.
n
(chemistry) A covalent atomic bond that is rotationally symmetric about its axis.
n
(chemistry) A covalent bond in which one electron pair is shared between two atoms.
n
(chemistry) The cleavage of a covalent bond.
adj
(physics, chemistry) Exhibiting a valency (oxidation number) that is less than normal
n
(physics) A superheavy element.
adj
(chemistry) Describing the interactions between molecules due to intermolecular forces rather than covalent or ionic bonds
adj
(medicine) Having a vaccine valence of 4.
n
(chemistry) The condition of being trivalent
n
(chemistry) The condition of being trivalent; trivalence.
adj
(chemistry) Having no ligands bridging two centres
adj
(chemistry) Having an atomic valence of 1, or having only one valence.
n
(chemistry) The combining capacity of an atom, radical or functional group determined by the number of electrons that it will lose, gain, or share when it combines with other atoms etc.
n
(chemistry) A bond formed between one or more pairs of electrons in the valence shell of two or more atoms
n
(chemistry) any of the electrons in the outermost shell of an atom; capable of forming bonds with other atoms
n
(chemistry) the outermost shell of electrons in an atom; these electrons take part in bonding with other atoms
n
(especially chemistry) Valence.
adj
(chemistry, linguistics) Having valence.
n
(chemistry) A method of representing the three-dimensional structure of a molecule in which simple lines represent bonds in the plane of the image, wedge-shaped lines represent bonds towards the viewer, and dashed lines represent bonds away from the viewer.
adj
(inorganic chemistry) Having a valency of zero
n
(chemistry) Alternative form of pi bond [(physics, chemistry) A form of covalent bond in which a pair of atomic orbitals are shared]
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